subject:(High current low voltage)

University of Houston

1. Gampa, Ravishanker Venkata. Powering Particle Accelerators.

Degree: MS, Mechanical Engineering, 2017, University of Houston

► This thesis considers the design of power supplies for the magnetic and electrical dipoles used in typical particle accelerators. First the thermoelectric current generation system… (more)

Subjects/Keywords: Thermoelectric module; Power supply; High voltage low current; High current low voltage; Electric dipole; Magnetic dipole; Superconductivity

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APA (6^th Edition):

Gampa, R. V. (2017). Powering Particle Accelerators. (Masters Thesis). University of Houston. Retrieved from http://hdl.handle.net/10657/4544

Chicago Manual of Style (16^th Edition):

Gampa, Ravishanker Venkata. “Powering Particle Accelerators.” 2017. Masters Thesis, University of Houston. Accessed January 18, 2021. http://hdl.handle.net/10657/4544.

MLA Handbook (7^th Edition):

Gampa, Ravishanker Venkata. “Powering Particle Accelerators.” 2017. Web. 18 Jan 2021.

Vancouver:

Gampa RV. Powering Particle Accelerators. [Internet] [Masters thesis]. University of Houston; 2017. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/10657/4544.

Council of Science Editors:

Gampa RV. Powering Particle Accelerators. [Masters Thesis]. University of Houston; 2017. Available from: http://hdl.handle.net/10657/4544

Universitat Politècnica de Catalunya

2. López Julià, Toni. Prospects of voltage regulators for next generation computer microprocessors.

Degree: Departament d'Enginyeria Electrònica, 2010, Universitat Politècnica de Catalunya

URL: http://hdl.handle.net/10803/77908

► Synchronous buck converter based multiphase architectures are evaluated to determine whether or not the most widespread voltage regulator topology can meet the power delivery requirements… (more)

▼ Synchronous buck converter based multiphase architectures are evaluated to determine whether or not the most widespread voltage regulator topology can meet the power delivery requirements of next generation computer microprocessors. According to the prognostications, the load current will rise to 200A along with the decrease of the supply voltage to 0.5V and staggering tight dynamic and static load line tolerances. In view of these demands, researchers face serious challenges to bring forth compliant solutions that can further offer acceptable conversion efficiencies and minimum mainboard area occupancy. Among the most prominent investigation fronts are those surveying fundamental technology improvements aiming at making power semiconductor devices more effective at high switching frequency. The latter is of critical importance as the increase of the switching frequency is fundamentally recognized as the way forward to enhance power density conversion. Provided that switching losses must be kept low to enable the miniaturization of the filter components, one primary goal is to cope with semiconductor and system integration technologies enabling fast dynamic operation of ultra-low ON resistance power switches. This justifies the main focus of this thesis work, centered around a comprehensive analysis of the MOSFET switching behavior in the synchronous buck converter. The MOSFETs dynamic operation, far from being well describable with the traditional clamped inductive hard-switching mode, is strongly influenced by a number of frequently ignored linear and nonlinear parasitic elements that must be taken into account in order to fully predict real switching waveforms, understand their dynamics, and most importantly, identify and quantify the related mechanisms leading to heat generation. This will be revealed from in-depth investigations of the switched converter under fast switching speeds and heavy load. Recognizing the key relevance of appropriate modeling tools that support this task, the second focal point of the thesis aims at developing a number of suitable models for the switching analysis of power MOSFETs. Combined with a series of design guidelines and optimization procedures, these models form the basis of a proposed methodological approach, where numerical computations replace the usually enormous experimental effort to elucidate the most effective pathways towards reducing power losses. This gives rise to the concept referred to as virtual design loop, which is successfully applied to the development of a new power MOSFET technology offering outstanding dynamic and static performance characteristics. From a system perspective, the limits of the power density conversion will be explored for this and other emerging technologies that promise to open up a new paradigm in power integration capabilities. Advisors/Committee Members: [email protected] (authoremail), false (authoremailshow), Alarcón Cot, Eduard (director), true (authorsendemail).

Subjects/Keywords: Voltage regulators; Power mosfets; High switching frequency; Buck converter; Syncaronous; Microprocessor; Power supply; High current; Low voltage; 621.3

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APA (6^th Edition):

López Julià, T. (2010). Prospects of voltage regulators for next generation computer microprocessors. (Thesis). Universitat Politècnica de Catalunya. Retrieved from http://hdl.handle.net/10803/77908

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

López Julià, Toni. “Prospects of voltage regulators for next generation computer microprocessors.” 2010. Thesis, Universitat Politècnica de Catalunya. Accessed January 18, 2021. http://hdl.handle.net/10803/77908.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

López Julià, Toni. “Prospects of voltage regulators for next generation computer microprocessors.” 2010. Web. 18 Jan 2021.

Vancouver:

López Julià T. Prospects of voltage regulators for next generation computer microprocessors. [Internet] [Thesis]. Universitat Politècnica de Catalunya; 2010. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/10803/77908.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

López Julià T. Prospects of voltage regulators for next generation computer microprocessors. [Thesis]. Universitat Politècnica de Catalunya; 2010. Available from: http://hdl.handle.net/10803/77908

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toronto

3. Li, Chuanwei. Class-C PA-VCO Cell for FSK and GFSK Transmitters in 130nm Technology.

Degree: 2017, University of Toronto

URL: http://hdl.handle.net/1807/76641

►

Ultra-low power transceivers are widely used in portable devices powered by coin batteries, including applications for indoor localization and body area networks. In these applications,… (more)

Subjects/Keywords: BLE Transmitter; Current-reuse; High Efficiency; Power Amplifier; Ultra-low Power; Voltage-controlled Oscillator; 0544

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APA (6^th Edition):

Li, C. (2017). Class-C PA-VCO Cell for FSK and GFSK Transmitters in 130nm Technology. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/76641

Chicago Manual of Style (16^th Edition):

Li, Chuanwei. “Class-C PA-VCO Cell for FSK and GFSK Transmitters in 130nm Technology.” 2017. Masters Thesis, University of Toronto. Accessed January 18, 2021. http://hdl.handle.net/1807/76641.

MLA Handbook (7^th Edition):

Li, Chuanwei. “Class-C PA-VCO Cell for FSK and GFSK Transmitters in 130nm Technology.” 2017. Web. 18 Jan 2021.

Vancouver:

Li C. Class-C PA-VCO Cell for FSK and GFSK Transmitters in 130nm Technology. [Internet] [Masters thesis]. University of Toronto; 2017. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/1807/76641.

Council of Science Editors:

Li C. Class-C PA-VCO Cell for FSK and GFSK Transmitters in 130nm Technology. [Masters Thesis]. University of Toronto; 2017. Available from: http://hdl.handle.net/1807/76641

University of KwaZulu-Natal

4. Chamane, Mbalenhle Nokwanda. Protection of a voltage source converter (VSC) based HVDC system.

Degree: 2017, University of KwaZulu-Natal

URL: https://researchspace.ukzn.ac.za/handle/10413/16540

► To conserve energy and promote environmental sustainability, the power industry has invested a great deal into the generation of electricity using renewable energy (RE) sources.… (more)

▼ To conserve energy and promote environmental sustainability, the power industry has invested a great deal into the generation of electricity using renewable energy (RE) sources. For such applications, high voltage direct current (HVDC) systems are considered a highly efficient alternative for bulk power transmission. Recent advances in technology favour the use of voltage source converter (VSC) based HVDC systems for the integration of RE sources. These schemes are favoured for their controllability and provide major reinforcements to the power systems. Despite its promising future, the technology is constrained by the unavailability of a reliable protection scheme, as the operating times for HVDC protection schemes are required to be ten to a hundred times faster than existing AC protection algorithms. VSC-HVDC networks are usually more vulnerable to DC-side faults. Selective protection against these faults is therefore essential for safe and reliable operation of the network. This study provides the necessary concepts to develop VSC-HVDC protection algorithms for multi-terminal (MT) meshed HVDC systems. DC fault characteristics were initially investigated. They provided a basic understanding of the VSCs natural responses to DC fault scenarios. The study also focused on analysing factors that may adversely influence the systems protection performance. These include the DC fault distance, DC-link conductor sizes and DC fault impedance. Results obtained from these variations show that the DC-link capacitor was one of the main sources that cause the high rise of DC fault currents and that these are the highest and the most dangerous when closest to the converter station. With a clear understanding of the DC fault characteristics, a protection scheme has been proposed. Initially, different methods are discussed with the intent of deciding on the scheme that is the most suitable. Detection techniques based on the discrete wavelet transform (DWT) for primary protection and the current derivative technique for back-up were chosen as the most promising. These techniques offer accuracy, speed and selectivity which are factors that are all important for the network. The single VSC terminal travelling wave technique was implemented to identify the exact position of a DC fault. This method reduces costs as it eliminates the need of communication links. Finally, to isolate the affected cables, the hybrid DC circuit breakers (CB) were implemented into the VSC-HVDC system. The CBs have been coupled with a reactance for fault current limiting and to isolate the system before it reaches an uninterruptable current magnitude. Back-up AC CBs were included on the AC side of the network and were stationed to separate the VSC network from the AC grid in cases where the implemented primary protection scheme fails. Advisors/Committee Members: Dorrell, David George. (advisor), Davidson, Innocent Ewean. (advisor), Gitau, Michael Njoroge. (advisor).

Subjects/Keywords: HIGH-voltage.; Voltage source converter.; Direct current.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chamane, M. N. (2017). Protection of a voltage source converter (VSC) based HVDC system. (Thesis). University of KwaZulu-Natal. Retrieved from https://researchspace.ukzn.ac.za/handle/10413/16540

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chamane, Mbalenhle Nokwanda. “Protection of a voltage source converter (VSC) based HVDC system.” 2017. Thesis, University of KwaZulu-Natal. Accessed January 18, 2021. https://researchspace.ukzn.ac.za/handle/10413/16540.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chamane, Mbalenhle Nokwanda. “Protection of a voltage source converter (VSC) based HVDC system.” 2017. Web. 18 Jan 2021.

Vancouver:

Chamane MN. Protection of a voltage source converter (VSC) based HVDC system. [Internet] [Thesis]. University of KwaZulu-Natal; 2017. [cited 2021 Jan 18]. Available from: https://researchspace.ukzn.ac.za/handle/10413/16540.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chamane MN. Protection of a voltage source converter (VSC) based HVDC system. [Thesis]. University of KwaZulu-Natal; 2017. Available from: https://researchspace.ukzn.ac.za/handle/10413/16540

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Hong Kong University of Science and Technology

5. Hu, Xiao Hao. Analysis and design of three-state controlled transition mode for a buck-boost converter with efficiency and dynamic response enhancement.

Degree: 2013, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-62303 ; https://doi.org/10.14711/thesis-b1251120 ; http://repository.ust.hk/ir/bitstream/1783.1-62303/1/th_redirect.html

► Integrated non-inverting Buck-Boost converter is drawing more and more attention because it can achieve both voltage step-down and step-up. Conventionally, a Buck-Boost converter is operated… (more)

▼ Integrated non-inverting Buck-Boost converter is drawing more and more attention because it can achieve both voltage step-down and step-up. Conventionally, a Buck-Boost converter is operated in Buck Mode, Boost Mode or Transition Mode when the input voltage is larger than, smaller than or close to the output voltage, respectively. However, Transition Mode has a lower efficiency compared with Buck Mode and Boost Mode mainly due to its larger average inductor current and inductor current ripple. In order to minimize the power loss of Transition Mode, an additional state, where both the input and output are connected to the inductor, has been introduced in prior art. This leads to a Three-State Transition Mode which has a lower average inductor current and thus a higher efficiency compared to conventional Transition Mode. This technique has been used in some applications to enhance efficiency and achieve smooth mode transition. However, detailed analyses on how the duration of the additional state may affect the efficiency are not provided. The dependences of other converter parameters such as average inductor current, inductor current ripple and output voltage ripple on the additional state are not revealed. Moreover, it still remains unknown how the small-signal dynamic behavior of the power converter will be modified by incorporating a third state. In this thesis, detailed analyses on Three-State Transition Mode are given, which show the conduction loss reduction due to the reduced average inductor current and inductor current ripple. In addition, with this state, output voltage ripple is also reduced. Furthermore, dynamic behavior of Three-State Transition Mode is also analyzed, which indicates a shift of complex poles and right-half-plane (RHP) zero to higher frequency with this additional state. This implies an improvement in dynamic response. A prototype circuit of a Buck-Boost converter operating in Three-State Transition Mode has been designed and implemented using AMS 0.35μm CMOS technology to verify the analyses. A novel Ramp and CLK Generator is proposed and utilized in the control circuitry to achieve regulation for Three-State Transition Mode. Measurement results show that 30% efficiency improvement can be achieved at the maximum loading current of 500mA. Gain-Phase Analyzer measurement verifies that the location of complex poles of Three-State Transition Mode is moved to twice as high as conventional Transition Mode. The location of RHP zero is also higher with the additional state. Besides, converter using Three-State Transition Mode can be stabilized with a smaller compensation capacitor.

Subjects/Keywords: Electric current converters ; Low voltage integrated circuits

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hu, X. H. (2013). Analysis and design of three-state controlled transition mode for a buck-boost converter with efficiency and dynamic response enhancement. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-62303 ; https://doi.org/10.14711/thesis-b1251120 ; http://repository.ust.hk/ir/bitstream/1783.1-62303/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hu, Xiao Hao. “Analysis and design of three-state controlled transition mode for a buck-boost converter with efficiency and dynamic response enhancement.” 2013. Thesis, Hong Kong University of Science and Technology. Accessed January 18, 2021. http://repository.ust.hk/ir/Record/1783.1-62303 ; https://doi.org/10.14711/thesis-b1251120 ; http://repository.ust.hk/ir/bitstream/1783.1-62303/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hu, Xiao Hao. “Analysis and design of three-state controlled transition mode for a buck-boost converter with efficiency and dynamic response enhancement.” 2013. Web. 18 Jan 2021.

Vancouver:

Hu XH. Analysis and design of three-state controlled transition mode for a buck-boost converter with efficiency and dynamic response enhancement. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2013. [cited 2021 Jan 18]. Available from: http://repository.ust.hk/ir/Record/1783.1-62303 ; https://doi.org/10.14711/thesis-b1251120 ; http://repository.ust.hk/ir/bitstream/1783.1-62303/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hu XH. Analysis and design of three-state controlled transition mode for a buck-boost converter with efficiency and dynamic response enhancement. [Thesis]. Hong Kong University of Science and Technology; 2013. Available from: http://repository.ust.hk/ir/Record/1783.1-62303 ; https://doi.org/10.14711/thesis-b1251120 ; http://repository.ust.hk/ir/bitstream/1783.1-62303/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

6. Srujana, A. Soft computing techniques for HVDC control.

Degree: Electrical and Electronics, 2011, Jawaharlal Nehru Technological University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/3490

►

High Voltage Direct Current transmission systems have a very important place in today’s power system Scenario. HVDC link is inherently non-linear in nature. Obtaining an… (more)

Subjects/Keywords: Soft computing techniques; High Voltage Direct Current

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Srujana, A. (2011). Soft computing techniques for HVDC control. (Thesis). Jawaharlal Nehru Technological University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/3490

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Srujana, A. “Soft computing techniques for HVDC control.” 2011. Thesis, Jawaharlal Nehru Technological University. Accessed January 18, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/3490.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Srujana, A. “Soft computing techniques for HVDC control.” 2011. Web. 18 Jan 2021.

Vancouver:

Srujana A. Soft computing techniques for HVDC control. [Internet] [Thesis]. Jawaharlal Nehru Technological University; 2011. [cited 2021 Jan 18]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/3490.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Srujana A. Soft computing techniques for HVDC control. [Thesis]. Jawaharlal Nehru Technological University; 2011. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/3490

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

7. Rama Devi, A. Investigations on the study of capacitor commutated converter HVDC System.

Degree: Electronics, 2011, Jawaharlal Nehru Technological University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/3497

►

High Voltage Direct Current abbreviated as HVDC are extremely used for transmitting power all over the world. Line commutated thyristor converters used in HVDC schemes… (more)

▼

High Voltage Direct Current abbreviated as HVDC are extremely used for transmitting power all over the world. Line commutated thyristor converters used in HVDC schemes are often the economic means of transmitting bulk power over long distance through overhead lines/cables or for interconnection of asynchronous AC networks. However, the relative portion of the DC power to the total system is growing. In other words, the AC system at the terminals of HVDC is becoming relatively weaker. The conventional HVDC schemes rely on AC network voltage to commutate the thyristor valves. The robustness of the AC networks is therefore critical for proper operation of the converters. This imposes a serious limitation during inverter operation and particularly, when the converter is applied in extremely long DC cable transmission or feeds a weak AC network. The present work focuses on the improvements to be made to the conventional converter HVDC technology when operated with weak AC networks by performing extensive studies. One effective way to overcome the shortcomings of conventional converter technology is by proposing a special converter known as Capacitor Commutated Converter abbreviated as CCC HVDC scheme uses series capacitor as an auxiliary device during commutation process. The CCC is characterized by having a series capacitor inserted between converter valve and the converter transformer. The series capacitor contributes to the support of the reactive power for the converter station avoiding the necessity of an additional compensators and reducing the cost of the filter. It also alleviates the system to operate steadily even if the firing angle or inverter extinction angle is nearly zero or negative. Under such circumstances, commutation failures are avoided and reactive power consumption is greatly reduced. Because of the positive impedance characteristics, the CCC technology is superior when applied in HVDC transmission with long cable weak AC systems.

References p. 232-242, Appendix p. 243-249

Advisors/Committee Members: Amarnath, J, Murthy, G R K.

Subjects/Keywords: High Voltage Direct Current; Line Commutated Converter

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Rama Devi, A. (2011). Investigations on the study of capacitor commutated converter HVDC System. (Thesis). Jawaharlal Nehru Technological University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/3497

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Rama Devi, A. “Investigations on the study of capacitor commutated converter HVDC System.” 2011. Thesis, Jawaharlal Nehru Technological University. Accessed January 18, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/3497.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Rama Devi, A. “Investigations on the study of capacitor commutated converter HVDC System.” 2011. Web. 18 Jan 2021.

Vancouver:

Rama Devi A. Investigations on the study of capacitor commutated converter HVDC System. [Internet] [Thesis]. Jawaharlal Nehru Technological University; 2011. [cited 2021 Jan 18]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/3497.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Rama Devi A. Investigations on the study of capacitor commutated converter HVDC System. [Thesis]. Jawaharlal Nehru Technological University; 2011. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/3497

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of KwaZulu-Natal

8. Lasabi, Olanrewaju Adedamola. Performance of insulators under HVDC stress.

Degree: 2018, University of KwaZulu-Natal

URL: https://researchspace.ukzn.ac.za/handle/10413/16643

► Ongoing industrialization and expansion in developing economies around the world calls for an upgrade and reinforcement of the current electrical power systems with the use… (more)

▼ Ongoing industrialization and expansion in developing economies around the world calls for an upgrade and reinforcement of the current electrical power systems with the use of high voltage direct current (HVDC) transmission and distribution systems. A major factor for these systems is the choice of suitable insulators required by the transmission lines. Insulators under HVDC are expected to function irrespective of the various stresses associated with their use, varying and extreme environmental conditions. The electric field distribution around insulators under HVDC stress is different to that of insulators under an AC stress due to electrical characteristics (resistivity and permittivity) and the space charge accumulation in the air-solid interface of the insulation system. This contributes to the mechanism of breakdown for insulators under DC stress. This study contributes to the knowledge and understanding of insulator breakdown voltage under HVDC stress. Experiments were carried out with a 22 kV silicone rubber insulator according to IEC 60060-1 standards, to understand the breakdown voltage under impulse, AC and HVDC in both dry and wet conditions. The results indicated that the impulse breakdown occurred at a higher voltage, compared to DC and AC, as expected due to the short duration of the applied voltage. It was noted that the breakdown voltage for negative DC was higher than the positive DC, an indication that the space charge generation and distribution may be the cause. Breakdown tests were carried out on 22 kV silicone rubber and glass cap-and-pin insulators under AC, negative and positive polarity HVDC stress where the effect of the surface charge was investigated. The course of these surface charges was modified through a corona source and quantified by measuring the leakage current along the insulator surface. The results were analyzed and showed that the choice of insulator material plays a crucial role in DC insulation system: silicone rubber being an organic material exhibited more current than the non-organic glass insulators. To further aid the understanding of the differences in the electric field, the test arrangements were analysed using finite element models. The simulation results showed that under the application of DC voltage, the presence of space charges on the insulator surface distorts the electric field distribution along the insulators and the field becomes resistive as against capacitive under AC voltage when there is an increase in surface conductivity. Advisors/Committee Members: Swanson, Andrew Graham. (advisor).

Subjects/Keywords: High-voltage direct current.; Electrical insulators.

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APA (6^th Edition):

Lasabi, O. A. (2018). Performance of insulators under HVDC stress. (Thesis). University of KwaZulu-Natal. Retrieved from https://researchspace.ukzn.ac.za/handle/10413/16643

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lasabi, Olanrewaju Adedamola. “Performance of insulators under HVDC stress.” 2018. Thesis, University of KwaZulu-Natal. Accessed January 18, 2021. https://researchspace.ukzn.ac.za/handle/10413/16643.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lasabi, Olanrewaju Adedamola. “Performance of insulators under HVDC stress.” 2018. Web. 18 Jan 2021.

Vancouver:

Lasabi OA. Performance of insulators under HVDC stress. [Internet] [Thesis]. University of KwaZulu-Natal; 2018. [cited 2021 Jan 18]. Available from: https://researchspace.ukzn.ac.za/handle/10413/16643.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lasabi OA. Performance of insulators under HVDC stress. [Thesis]. University of KwaZulu-Natal; 2018. Available from: https://researchspace.ukzn.ac.za/handle/10413/16643

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

9. PAN XUEWEI. Soft-switching current-fed power converters for low voltage high current applications.

Degree: 2014, National University of Singapore

URL: http://scholarbank.nus.edu.sg/handle/10635/118902

Subjects/Keywords: Soft-switching; Current-fed; Power converters; Low voltage high current; Fuel Cell Vehicles

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

XUEWEI, P. (2014). Soft-switching current-fed power converters for low voltage high current applications. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/118902

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

XUEWEI, PAN. “Soft-switching current-fed power converters for low voltage high current applications.” 2014. Thesis, National University of Singapore. Accessed January 18, 2021. http://scholarbank.nus.edu.sg/handle/10635/118902.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

XUEWEI, PAN. “Soft-switching current-fed power converters for low voltage high current applications.” 2014. Web. 18 Jan 2021.

Vancouver:

XUEWEI P. Soft-switching current-fed power converters for low voltage high current applications. [Internet] [Thesis]. National University of Singapore; 2014. [cited 2021 Jan 18]. Available from: http://scholarbank.nus.edu.sg/handle/10635/118902.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

XUEWEI P. Soft-switching current-fed power converters for low voltage high current applications. [Thesis]. National University of Singapore; 2014. Available from: http://scholarbank.nus.edu.sg/handle/10635/118902

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of KwaZulu-Natal

10. Kangwa, Nsofwa Mwilwa. Small signal stability analysis of a voltage source converter (VSC) based high voltage direct current system with onshore wind power generation.

Degree: 2017, University of KwaZulu-Natal

URL: https://researchspace.ukzn.ac.za/handle/10413/16618

► Advances in power electronics over several decades has led to high voltage direct current (HVDC) transmission emerging as a good option for electricity transmission in… (more)

▼ Advances in power electronics over several decades has led to high voltage direct current (HVDC) transmission emerging as a good option for electricity transmission in many circumstances, and it is able to integrate with, and augment, conventional high voltage alternating current (HVAC) transmission. This is because HVDC provides enhanced system operation and improved support in the development of onshore and offshore transmission networks. Because of its speed and flexibility, HVDC technology can provide transmission systems with several advantages such as transfer capacity enhancement, better power flow control, transient stability improvement, damping of power oscillations, enhanced voltage stability and control, rejection of cascading disturbances, and the absence of reactive power generation or absorption by the cable or line. In Africa, there are three HVDC systems. The Caprivi Link Interconnector between Zambia and Namibia is the first and only one on the continent employing voltage source converters (VSC), as opposed to conventional line commutated converters (LCC). HVDC VSCs use insulated gate bipolar transistors (IGBTs) technology as switches. IGBTs provide more controllability and flexibility than the thyristors used in LCC technology. These features make them suitable for implementation in multi-terminal HVDC networks; which are envisaged to form HVDC grids in future. The Caprivi Link interconnector is therefore a pioneering project in the development of electricity transmission in Africa. The southern African power pool (SAPP) currently has inadequate electricity generation capacity. Investing in more renewable energy options, such as wind generation, coupled with the use of HVDC transmission, could be possible remedies for this. The aim of this research was to investigate small signal stability issues that can be present in VSC-HVDC systems. The Caprivi Link Interconnector is used as the contextualization of the investigated system. Different conditions such as AC system strength, controller parameter and wind power generation levels are investigated for their influence on the small signal stability of the system. Small signal stability analysis is also investigated for different HVDC configurations. It is found that the systems experience both electromagnetic as well as sub-synchronous oscillations. The sub-synchronous oscillations are generally well damped and only affect the DC impedances. Power System Stabilizers (PSS) as well as Thyristor Controlled Series Compensators (TCSC) are implemented as mitigation for the electromagnetic modes. Advisors/Committee Members: Venugopal, Chitra. (advisor), Dorrell, David George. (advisor).

Subjects/Keywords: Voltage source converter.; High-voltage direct current.; Wind power.

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APA (6^th Edition):

Kangwa, N. M. (2017). Small signal stability analysis of a voltage source converter (VSC) based high voltage direct current system with onshore wind power generation. (Thesis). University of KwaZulu-Natal. Retrieved from https://researchspace.ukzn.ac.za/handle/10413/16618

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kangwa, Nsofwa Mwilwa. “Small signal stability analysis of a voltage source converter (VSC) based high voltage direct current system with onshore wind power generation.” 2017. Thesis, University of KwaZulu-Natal. Accessed January 18, 2021. https://researchspace.ukzn.ac.za/handle/10413/16618.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kangwa, Nsofwa Mwilwa. “Small signal stability analysis of a voltage source converter (VSC) based high voltage direct current system with onshore wind power generation.” 2017. Web. 18 Jan 2021.

Vancouver:

Kangwa NM. Small signal stability analysis of a voltage source converter (VSC) based high voltage direct current system with onshore wind power generation. [Internet] [Thesis]. University of KwaZulu-Natal; 2017. [cited 2021 Jan 18]. Available from: https://researchspace.ukzn.ac.za/handle/10413/16618.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kangwa NM. Small signal stability analysis of a voltage source converter (VSC) based high voltage direct current system with onshore wind power generation. [Thesis]. University of KwaZulu-Natal; 2017. Available from: https://researchspace.ukzn.ac.za/handle/10413/16618

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Delft University of Technology

11. Palmans, J.A. (author). Partial Discharge Analysis and Recognition in Cables with Medium Voltage DC.

Degree: 2015, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:23ce777c-44ac-4707-9bd1-2986152afebd

► With the current state of power electronic conversion operating at Direct Current (DC) can in some cases be more efficient than ordinary Alternating Current (AC).… (more)

▼ With the current state of power electronic conversion operating at Direct Current (DC) can in some cases be more efficient than ordinary Alternating Current (AC). DC voltage energy transmission and distribution is, thus, playing an increasingly important role. The continuity of the electrical energy supply is essential for a well-functioning society. At AC voltage problems with cables can in most cases be prematurely detected with Partial Discharge (PD) measurements. Partial discharges represent defects in the insulation system of electrical cables and devices. They can be categorized in three groups: corona, surface and internal discharges. By knowing the source of the partial discharges and quantifying the discharges, the dielectric condition of a cable can be estimated. At AC voltage the various patterns of partial discharges, also known as fingerprints, can already be recognized and the source of the defect can be determined. The trend for electrical power distribution is, thus, to use DC voltage instead of AC voltage. However, one problem that should be tackled is that partial discharges under DC voltage form a challenge in recognizing the source of the discharge. Therefore, it is still difficult to properly estimate the dielectric condition of the cable based on DC voltage partial discharges. To help overcome this challenge this master thesis research will try to find a relation between measured medium voltage DC partial discharge patterns and the actual source of the discharges. The influence of noise and data segregation of the measurements will be investigated. A method to separate multiple types of partial discharge from a single measurement will also be discussed. Furthermore, limits will be determined in how long a measurement needs to take in order to reliably detect the source of a certain defect. Four artificial PD defects were used to acquire specific data on the individual types of discharges at DC voltage. PD analysis has been done with a self-written Matlab program. By creating classification figures trends have been found that help recognizing the type of defect in a DC PD measurement. The influence of noise and data segregation on DC PD measurements has also been evaluated. Noise can significantly influence the classification figure. Therefore, noise should be prevented or filtered out prior to the classification process. A single noise waveform can already cause a large standard deviation in the classification figures. However, the calculated average values keep displaying the same trend. Thus, a single noise waveform does not hinder the recognition of the PD source. If due to high background noise lower amplitude PDs are lost, data segregation occurs. The physical relationships of time and charge between succeeding discharges will be distorted. To achieve a successful classification a minimum amount of PD waveforms is necessary, which has been investigated. For positive corona at least 250 PDs should be acquired to get the same trends in the classification figure as with 1000 PD waveforms. To… Advisors/Committee Members: Rodrigo Mor, A. (mentor).

Subjects/Keywords: Partial Discharge; High Voltage; Medium Voltage; Direct Current

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APA (6^th Edition):

Palmans, J. A. (. (2015). Partial Discharge Analysis and Recognition in Cables with Medium Voltage DC. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:23ce777c-44ac-4707-9bd1-2986152afebd

Chicago Manual of Style (16^th Edition):

Palmans, J A (author). “Partial Discharge Analysis and Recognition in Cables with Medium Voltage DC.” 2015. Masters Thesis, Delft University of Technology. Accessed January 18, 2021. http://resolver.tudelft.nl/uuid:23ce777c-44ac-4707-9bd1-2986152afebd.

MLA Handbook (7^th Edition):

Palmans, J A (author). “Partial Discharge Analysis and Recognition in Cables with Medium Voltage DC.” 2015. Web. 18 Jan 2021.

Vancouver:

Palmans JA(. Partial Discharge Analysis and Recognition in Cables with Medium Voltage DC. [Internet] [Masters thesis]. Delft University of Technology; 2015. [cited 2021 Jan 18]. Available from: http://resolver.tudelft.nl/uuid:23ce777c-44ac-4707-9bd1-2986152afebd.

Council of Science Editors:

Palmans JA(. Partial Discharge Analysis and Recognition in Cables with Medium Voltage DC. [Masters Thesis]. Delft University of Technology; 2015. Available from: http://resolver.tudelft.nl/uuid:23ce777c-44ac-4707-9bd1-2986152afebd

Brno University of Technology

12. Kolařík, Robin. Zkratové proudy ve stejnosměrných systémech: Short Circuit Currents in DC Systems.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/173695

► The bachelor thesis deals with the analysis of short-circuit currents in DC systems. The thesis introduces the possibility of application of low voltage DC distribution… (more)

Subjects/Keywords: Stejnosměrný proud; stejnosměrná síť; nízké napětí; vysoké napětí; stejnosměrný zkrat; přenosová síť; stejnosměrné napětí; distribuční síť; střídavá síť; zkratový proud; Direct current; DC network; low voltage; High Voltage; DC short circuit; transmission network; DC voltage; distribution network; AC network; short-circuit current

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APA (6^th Edition):

Kolařík, R. (2019). Zkratové proudy ve stejnosměrných systémech: Short Circuit Currents in DC Systems. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/173695

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kolařík, Robin. “Zkratové proudy ve stejnosměrných systémech: Short Circuit Currents in DC Systems.” 2019. Thesis, Brno University of Technology. Accessed January 18, 2021. http://hdl.handle.net/11012/173695.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kolařík, Robin. “Zkratové proudy ve stejnosměrných systémech: Short Circuit Currents in DC Systems.” 2019. Web. 18 Jan 2021.

Vancouver:

Kolařík R. Zkratové proudy ve stejnosměrných systémech: Short Circuit Currents in DC Systems. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/11012/173695.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kolařík R. Zkratové proudy ve stejnosměrných systémech: Short Circuit Currents in DC Systems. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/173695

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Manchester

13. Kawano, Kayoko. Application of the ultra high resolution, low voltage scanning electron microscopy in the materials science.

Degree: PhD, 2012, University of Manchester

URL: https://www.research.manchester.ac.uk/portal/en/theses/application-of-the-ultra-high-resolution-low-voltage-scanning-electron-microscopy-in-the-materials-science(341c7955-1da7-49be-9dd3-a3f3248bae05).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719270

► The efficiency of low voltage scanning electron microscopy, which presents near-surface information, has been well known for a long time. However, it is not widely… (more)

Subjects/Keywords: 620.1; ultra high resolution, low voltage SEM

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APA (6^th Edition):

Kawano, K. (2012). Application of the ultra high resolution, low voltage scanning electron microscopy in the materials science. (Doctoral Dissertation). University of Manchester. Retrieved from https://www.research.manchester.ac.uk/portal/en/theses/application-of-the-ultra-high-resolution-low-voltage-scanning-electron-microscopy-in-the-materials-science(341c7955-1da7-49be-9dd3-a3f3248bae05).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719270

Chicago Manual of Style (16^th Edition):

Kawano, Kayoko. “Application of the ultra high resolution, low voltage scanning electron microscopy in the materials science.” 2012. Doctoral Dissertation, University of Manchester. Accessed January 18, 2021. https://www.research.manchester.ac.uk/portal/en/theses/application-of-the-ultra-high-resolution-low-voltage-scanning-electron-microscopy-in-the-materials-science(341c7955-1da7-49be-9dd3-a3f3248bae05).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719270.

MLA Handbook (7^th Edition):

Kawano, Kayoko. “Application of the ultra high resolution, low voltage scanning electron microscopy in the materials science.” 2012. Web. 18 Jan 2021.

Vancouver:

Kawano K. Application of the ultra high resolution, low voltage scanning electron microscopy in the materials science. [Internet] [Doctoral dissertation]. University of Manchester; 2012. [cited 2021 Jan 18]. Available from: https://www.research.manchester.ac.uk/portal/en/theses/application-of-the-ultra-high-resolution-low-voltage-scanning-electron-microscopy-in-the-materials-science(341c7955-1da7-49be-9dd3-a3f3248bae05).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719270.

Council of Science Editors:

Kawano K. Application of the ultra high resolution, low voltage scanning electron microscopy in the materials science. [Doctoral Dissertation]. University of Manchester; 2012. Available from: https://www.research.manchester.ac.uk/portal/en/theses/application-of-the-ultra-high-resolution-low-voltage-scanning-electron-microscopy-in-the-materials-science(341c7955-1da7-49be-9dd3-a3f3248bae05).html ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719270

University of Manchester

14. Kawano, Kayoko. Application of the Ultra High Resolution, Low Voltage Scanning Electron Microscopy in the Materials Science.

Degree: 2012, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:163192

► The efficiency of low voltage scanning electron microscopy, which presents near-surface information, has been well known for a long time. However, it is not widely… (more)

Subjects/Keywords: ultra high resolution; low voltage SEM

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kawano, K. (2012). Application of the Ultra High Resolution, Low Voltage Scanning Electron Microscopy in the Materials Science. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:163192

Chicago Manual of Style (16^th Edition):

Kawano, Kayoko. “Application of the Ultra High Resolution, Low Voltage Scanning Electron Microscopy in the Materials Science.” 2012. Doctoral Dissertation, University of Manchester. Accessed January 18, 2021. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:163192.

MLA Handbook (7^th Edition):

Kawano, Kayoko. “Application of the Ultra High Resolution, Low Voltage Scanning Electron Microscopy in the Materials Science.” 2012. Web. 18 Jan 2021.

Vancouver:

Kawano K. Application of the Ultra High Resolution, Low Voltage Scanning Electron Microscopy in the Materials Science. [Internet] [Doctoral dissertation]. University of Manchester; 2012. [cited 2021 Jan 18]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:163192.

Council of Science Editors:

Kawano K. Application of the Ultra High Resolution, Low Voltage Scanning Electron Microscopy in the Materials Science. [Doctoral Dissertation]. University of Manchester; 2012. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:163192

University of Washington

15. Pepin, Eric Philip. High-Voltage Compliant, Electrode-Invariant Neural Stimulation Electronics Compatible with Low-Voltage, Bulk-CMOS Integration.

Degree: 2015, University of Washington

URL: http://hdl.handle.net/1773/33811

► This work explores the challenges of implementing practical, electrical neural stimulation interfaces using modern silicon CMOS technologies. To overcome said challenges, which stem from the… (more)

▼ This work explores the challenges of implementing practical, electrical neural stimulation interfaces using modern silicon CMOS technologies. To overcome said challenges, which stem from the discrepancy between the low-voltage limitations of modern CMOS devices and the large stimulation voltages often observed at response-evoking stimulus levels, a new stimulator front-end is proposed. The high-voltage compliant front-end can reliably drive biphasic, constant-current stimulus through a wide range of electrode impedances while being safely implemented in a low-voltage, bulk-CMOS technology. The topology of the front-end is based on a sink-regulated H-bridge. Stimulus current is supplied using specialized, fully-integrated dynamic voltage supplies (DVSs), which are controlled in closed-loop to have an output voltage approximately equal to the voltage of the electrode each supplies stimulus to. The entire stimulus waveform is regulated by a single, low-voltage current-DAC, which can safely interface with the electrodes (which may be at high voltages) via specialized high-voltage adapter (HVA) circuits. To account for “capacitive-looking” electrodes and to provide unique, “electrode-invariant” performance, the front-end uses the balancing stimulus current to discharge the electrode-tissue-interface impedance (ZE), and only after full ZE discharge has been detected is a DVS used to supply the remaining balancing stimulus. In this thesis the described front-end topology and the enabling high-voltage operating circuits are presented and discussed in detail. Additionally, a stand-alone DVS circuit has been fabricated in 65nm bulk-CMOS, demonstrating the power-supplying and transient performance required by the proposed stimulator design. Another chip, featuring the entire integrated neural stimulator front-end, has also been designed in 65nm bulk-CMOS, with post-layout simulations showing ±11V compliance (approximately) across a 50μA to 2mA stimulus amplitude range. The efficacy of the proposed integrated electronics in potential neural stimulation applications is also explored using a board-level prototype and in-vivo evaluation. Advisors/Committee Members: Rudell, Jacques C (advisor).

Subjects/Keywords: high-voltage; low-voltage CMOS; neural stimulation; Electrical engineering; electrical engineering

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APA (6^th Edition):

Pepin, E. P. (2015). High-Voltage Compliant, Electrode-Invariant Neural Stimulation Electronics Compatible with Low-Voltage, Bulk-CMOS Integration. (Thesis). University of Washington. Retrieved from http://hdl.handle.net/1773/33811

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pepin, Eric Philip. “High-Voltage Compliant, Electrode-Invariant Neural Stimulation Electronics Compatible with Low-Voltage, Bulk-CMOS Integration.” 2015. Thesis, University of Washington. Accessed January 18, 2021. http://hdl.handle.net/1773/33811.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pepin, Eric Philip. “High-Voltage Compliant, Electrode-Invariant Neural Stimulation Electronics Compatible with Low-Voltage, Bulk-CMOS Integration.” 2015. Web. 18 Jan 2021.

Vancouver:

Pepin EP. High-Voltage Compliant, Electrode-Invariant Neural Stimulation Electronics Compatible with Low-Voltage, Bulk-CMOS Integration. [Internet] [Thesis]. University of Washington; 2015. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/1773/33811.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pepin EP. High-Voltage Compliant, Electrode-Invariant Neural Stimulation Electronics Compatible with Low-Voltage, Bulk-CMOS Integration. [Thesis]. University of Washington; 2015. Available from: http://hdl.handle.net/1773/33811

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of New South Wales

16. Morsalin, Sayidul. Diagnostic Measurement and Modelling of Electrical Insulation Based on Very Low Frequency High Voltage Excitation.

Degree: Electrical Engineering & Telecommunications, 2020, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/67032

► Electrical insulation of high voltage (HV) power equipment plays essential roles in sound functioning and reliability of power systems. Examining the insulation condition through various… (more)

▼ Electrical insulation of high voltage (HV) power equipment plays essential roles in sound functioning and reliability of power systems. Examining the insulation condition through various diagnostic testings such as dielectric response (DR) and partial discharge (PD) measurements may be able to reveal the presence of defects and degradations in the insulation. Very low frequency (VLF- 1 Hz or lower) applied voltage has emerged as a promising diagnostic tool as it significantly reduces the required reactive power from the test supply. However, the existing interpretation knowledge at conventional power frequency (PF) 50 Hz cannot be directly applied to understand test results in the VLF range. This is the main motivation of the research which explores the dielectric behaviours and associated physical processes under VLF excitation.For dielectric response, experimental studies were carried out on short sections of medium voltage service-aged cross-linked polyethylene (XLPE) cables to diagnose the bulk insulation condition, such as the measurement of dissipation factor, polarisation and depolarisation current, frequency domain spectroscopy, activation energy etc. Experimental results show that dielectric behaviours of electric insulation are influenced by several factors including the excitation frequency, voltage amplitude, ambient temperature, dipolar processes (e.g. conduction and polarisation) etc. An empirical physical model describing the loss-factor measurement based on well-known dipolar theories is developed and verified by experimental results. Different partial discharge processes (e.g. cavity, surface and corona) are also investigated at both VLF (0.1 Hz) and 50 Hz applied voltage. Measurement results are presented with the phase-resolved image and show that discharge characteristics (inception voltage, magnitude and repetition rate) are strongly dependent on the applied frequency. Based on the finite element analysis (FEA) method, a dynamic model to simulate the discharge behaviours in the cavity or on the degraded surface is developed to examine the frequency dependence. The main contributions of this research include the measurement and modelling of both the dielectric response and partial discharge in electrical insulation. The research findings provide valuable information to understand the diagnostic characteristics at very low frequency excitation. Advisors/Committee Members: Phung, A/Prof. Toan, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW.

Subjects/Keywords: High voltage testing; Diagnostic testing; Very low frequency excitation; Dielectric response; Partial discharge; Dielectric dissipation factor; Modelling; Cavity, surface and corona discharge; Pol/depolarisation current method; Frequency domain spectroscopy

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APA (6^th Edition):

Morsalin, S. (2020). Diagnostic Measurement and Modelling of Electrical Insulation Based on Very Low Frequency High Voltage Excitation. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/67032

Chicago Manual of Style (16^th Edition):

Morsalin, Sayidul. “Diagnostic Measurement and Modelling of Electrical Insulation Based on Very Low Frequency High Voltage Excitation.” 2020. Doctoral Dissertation, University of New South Wales. Accessed January 18, 2021. http://handle.unsw.edu.au/1959.4/67032.

MLA Handbook (7^th Edition):

Morsalin, Sayidul. “Diagnostic Measurement and Modelling of Electrical Insulation Based on Very Low Frequency High Voltage Excitation.” 2020. Web. 18 Jan 2021.

Vancouver:

Morsalin S. Diagnostic Measurement and Modelling of Electrical Insulation Based on Very Low Frequency High Voltage Excitation. [Internet] [Doctoral dissertation]. University of New South Wales; 2020. [cited 2021 Jan 18]. Available from: http://handle.unsw.edu.au/1959.4/67032.

Council of Science Editors:

Morsalin S. Diagnostic Measurement and Modelling of Electrical Insulation Based on Very Low Frequency High Voltage Excitation. [Doctoral Dissertation]. University of New South Wales; 2020. Available from: http://handle.unsw.edu.au/1959.4/67032

Delft University of Technology

17. Subbaraj, vignesh bangaru (author). LVDC for buildings in the Netherlands: Technical and commercial potentials from DC Office Lab.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:2eae40ac-520b-4b9d-a7cb-afb1792ed204

► Current energy concerns like growing energy demand, the desire for a clean environment and energy conservation started thrusting the society towards distributed renewable electricity generation… (more)

▼ Current energy concerns like growing energy demand, the desire for a clean environment and energy conservation started thrusting the society towards distributed renewable electricity generation (DG) technologies. These technologies such as PV solar, Fuel Cells (FC) and urban wind produce Direct Current (DC). The electronic equipment such as laptops, PCs, communication systems, LED lighting, batteries, Electric Vehicles (EV) and Fuel Cell Electric Vehicles (FCEV) also operate in DC. But the present-day electricity distribution system is based on Alternating Current (AC). From this conventional system, the conversion losses can be substantial when DC generation and DC loads are operated. For which, several (DC/AC – AC/DC) conversion steps are required. These conversion losses can be mitigated by removing the intermediate conversion steps and distributing DC power to the DC loads directly. For which, the main aim of the thesis focuses on the technical and commercial potential of Low Voltage DC (LVDC) grids for buildings in the Netherlands. DC office is a small office building at The Green Village (TGV) in TU Delft where a 350 Vdc LVDC system is installed for experimental purposes. The experiments are carried out using both LVDC and LVAC grids in DC Office project. The obtained experimental data are randomized using Matlab to create a year-long load profile. The results are used for discussing the LVDC technical potential in terms of overall efficiency and energy savings. From these results cost-savings are calculated. Along with this, usage of copper and aluminum as electrical conductor in buildings and its investment cost-savings are discussed. For the commercial potential of LVDC grids for buildings in the Netherlands, the Function of Innovation Systems (FIS) approach is used to identify the corresponding LVDC stakeholders, research, pilot projects, rules and regulations and policies for development. For the technical potential, there are three different cases formulated for analysis. They are ACTube case, DCLED case and ACLED case. In the experiments, tubelights are used in the ACTube case and LEDs are used in the DCLED case, in-order to neglect the energy savings obtained from LED technology, ACLED case is assumed. The overall efficiency of the LVDC grid (DCLED case) is 94.82% and the LVAC grid (ACTube case) is 88.16% and the LVAC grid (ACLED case) is 88.67%. From all these cases, the LVDC grid is around 6.5% more efficient than LVAC grid in small buildings similar to the DC Office. The energy savings obtained by LVDC grid replacing LVAC grid (ACTube) is 2013 kWh/year, and if tubelights in AC are replaced with LEDs in AC, then 1854 kWh/year is estimated to be saved. The cost-savings are calculated from the energy savings obtained by replacing LVAC grid (ACTube case) with LVDC grid (DCLED case). Considering the total lifetime of the LVDC system as 12 years, the cost savings obtained are € 221.43/year achieving payback in 6 years. For the commercial potential, using seven functions of FIS it is identified that there… Advisors/Committee Members: Kamp, Linda (mentor), Fens, Theo (graduation committee), van Wijk, Ad (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: low voltage; Direct Current; Function of Innovation; FIS; LVDC grid; LVDC

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Subbaraj, v. b. (. (2019). LVDC for buildings in the Netherlands: Technical and commercial potentials from DC Office Lab. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:2eae40ac-520b-4b9d-a7cb-afb1792ed204

Chicago Manual of Style (16^th Edition):

Subbaraj, vignesh bangaru (author). “LVDC for buildings in the Netherlands: Technical and commercial potentials from DC Office Lab.” 2019. Masters Thesis, Delft University of Technology. Accessed January 18, 2021. http://resolver.tudelft.nl/uuid:2eae40ac-520b-4b9d-a7cb-afb1792ed204.

MLA Handbook (7^th Edition):

Subbaraj, vignesh bangaru (author). “LVDC for buildings in the Netherlands: Technical and commercial potentials from DC Office Lab.” 2019. Web. 18 Jan 2021.

Vancouver:

Subbaraj vb(. LVDC for buildings in the Netherlands: Technical and commercial potentials from DC Office Lab. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 18]. Available from: http://resolver.tudelft.nl/uuid:2eae40ac-520b-4b9d-a7cb-afb1792ed204.

Council of Science Editors:

Subbaraj vb(. LVDC for buildings in the Netherlands: Technical and commercial potentials from DC Office Lab. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:2eae40ac-520b-4b9d-a7cb-afb1792ed204

NSYSU

18. Wang, Sheng-Syong. High-Voltage Current Sensing Circuit Designs for Battery Management Systems.

Degree: Master, Electrical Engineering, 2015, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0609115-190814

► Battery management system (BMS) is one of the key technologies of electric vehicles (EVs) nowadays. The current sensing technologies are critical factors of the safety… (more)

Subjects/Keywords: current sensor; battery management system (BMS); nominal voltage; high-voltage; electric vehicles (EVs)

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APA (6^th Edition):

Wang, S. (2015). High-Voltage Current Sensing Circuit Designs for Battery Management Systems. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0609115-190814

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wang, Sheng-Syong. “High-Voltage Current Sensing Circuit Designs for Battery Management Systems.” 2015. Thesis, NSYSU. Accessed January 18, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0609115-190814.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wang, Sheng-Syong. “High-Voltage Current Sensing Circuit Designs for Battery Management Systems.” 2015. Web. 18 Jan 2021.

Vancouver:

Wang S. High-Voltage Current Sensing Circuit Designs for Battery Management Systems. [Internet] [Thesis]. NSYSU; 2015. [cited 2021 Jan 18]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0609115-190814.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wang S. High-Voltage Current Sensing Circuit Designs for Battery Management Systems. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0609115-190814

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

California State University – Sacramento

19. Kang, Harpreet Singh. Enhancement of power system stability with VSC-HVDC transmission.

Degree: MS, Electrical and Electronic Engineering, 2016, California State University – Sacramento

URL: http://hdl.handle.net/10211.3/170938

► The bulk power system is renovated with the introduction of power electronic devices and renewable energy. Maintaining the stability of the renovated system has been… (more)

Subjects/Keywords: Power system; Stability; VSC HVDC; Voltage Source Converter; High voltage direct current

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APA (6^th Edition):

Kang, H. S. (2016). Enhancement of power system stability with VSC-HVDC transmission. (Masters Thesis). California State University – Sacramento. Retrieved from http://hdl.handle.net/10211.3/170938

Chicago Manual of Style (16^th Edition):

Kang, Harpreet Singh. “Enhancement of power system stability with VSC-HVDC transmission.” 2016. Masters Thesis, California State University – Sacramento. Accessed January 18, 2021. http://hdl.handle.net/10211.3/170938.

MLA Handbook (7^th Edition):

Kang, Harpreet Singh. “Enhancement of power system stability with VSC-HVDC transmission.” 2016. Web. 18 Jan 2021.

Vancouver:

Kang HS. Enhancement of power system stability with VSC-HVDC transmission. [Internet] [Masters thesis]. California State University – Sacramento; 2016. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/10211.3/170938.

Council of Science Editors:

Kang HS. Enhancement of power system stability with VSC-HVDC transmission. [Masters Thesis]. California State University – Sacramento; 2016. Available from: http://hdl.handle.net/10211.3/170938

Loughborough University

20. Beharrysingh, Shiva. Phase unbalance on low-voltage electricity networks and its mitigation using static balancers.

Degree: PhD, 2014, Loughborough University

URL: http://hdl.handle.net/2134/16252

► Existing low-voltage networks may not accommodate high penetrations of low-carbon technologies. The topic of this thesis is unbalance, which if minimised can delay or avoid… (more)

Subjects/Keywords: 621.381; Current unbalance; Voltage unbalance; Forward-backward sweep method; Static balancer; Low-voltage electricity networks; Low-carbon technologies

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APA (6^th Edition):

Beharrysingh, S. (2014). Phase unbalance on low-voltage electricity networks and its mitigation using static balancers. (Doctoral Dissertation). Loughborough University. Retrieved from http://hdl.handle.net/2134/16252

Chicago Manual of Style (16^th Edition):

Beharrysingh, Shiva. “Phase unbalance on low-voltage electricity networks and its mitigation using static balancers.” 2014. Doctoral Dissertation, Loughborough University. Accessed January 18, 2021. http://hdl.handle.net/2134/16252.

MLA Handbook (7^th Edition):

Beharrysingh, Shiva. “Phase unbalance on low-voltage electricity networks and its mitigation using static balancers.” 2014. Web. 18 Jan 2021.

Vancouver:

Beharrysingh S. Phase unbalance on low-voltage electricity networks and its mitigation using static balancers. [Internet] [Doctoral dissertation]. Loughborough University; 2014. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/2134/16252.

Council of Science Editors:

Beharrysingh S. Phase unbalance on low-voltage electricity networks and its mitigation using static balancers. [Doctoral Dissertation]. Loughborough University; 2014. Available from: http://hdl.handle.net/2134/16252

21. Håkansson, Eva. Galvanic Corrosion of High-Temperature Low-Sag (HTLS) High Voltage Conductors: New Materials—New Challenges.

Degree: MS, Mechanical Engineering, 2013, U of Denver

URL: https://digitalcommons.du.edu/etd/979

► High-Temperature Low-Sag (HTLS) high voltage overhead conductors offer higher operating temperatures, reduced resistance and less sag than conventional designs. With up to twice the… (more)

Subjects/Keywords: Galvanic corrosion; High voltage conductors; High-temperature; Low-sag; Mechanical Engineering

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APA (6^th Edition):

Håkansson, E. (2013). Galvanic Corrosion of High-Temperature Low-Sag (HTLS) High Voltage Conductors: New Materials—New Challenges. (Thesis). U of Denver. Retrieved from https://digitalcommons.du.edu/etd/979

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Håkansson, Eva. “Galvanic Corrosion of High-Temperature Low-Sag (HTLS) High Voltage Conductors: New Materials—New Challenges.” 2013. Thesis, U of Denver. Accessed January 18, 2021. https://digitalcommons.du.edu/etd/979.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Håkansson, Eva. “Galvanic Corrosion of High-Temperature Low-Sag (HTLS) High Voltage Conductors: New Materials—New Challenges.” 2013. Web. 18 Jan 2021.

Vancouver:

Håkansson E. Galvanic Corrosion of High-Temperature Low-Sag (HTLS) High Voltage Conductors: New Materials—New Challenges. [Internet] [Thesis]. U of Denver; 2013. [cited 2021 Jan 18]. Available from: https://digitalcommons.du.edu/etd/979.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Håkansson E. Galvanic Corrosion of High-Temperature Low-Sag (HTLS) High Voltage Conductors: New Materials—New Challenges. [Thesis]. U of Denver; 2013. Available from: https://digitalcommons.du.edu/etd/979

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Salford

22. Naik, K. R. Series operation of thyristors in HVDC converters.

Degree: PhD, 1970, University of Salford

URL: http://usir.salford.ac.uk/id/eprint/43026/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.466768

► High voltage direct current. (hvdc) transmission of electrical paver has been made possible with the recent advent of multi-anode mercury arc valves with grading electrodes.… (more)

Subjects/Keywords: 621.3815; High voltage direct current

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APA (6^th Edition):

Naik, K. R. (1970). Series operation of thyristors in HVDC converters. (Doctoral Dissertation). University of Salford. Retrieved from http://usir.salford.ac.uk/id/eprint/43026/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.466768

Chicago Manual of Style (16^th Edition):

Naik, K R. “Series operation of thyristors in HVDC converters.” 1970. Doctoral Dissertation, University of Salford. Accessed January 18, 2021. http://usir.salford.ac.uk/id/eprint/43026/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.466768.

MLA Handbook (7^th Edition):

Naik, K R. “Series operation of thyristors in HVDC converters.” 1970. Web. 18 Jan 2021.

Vancouver:

Naik KR. Series operation of thyristors in HVDC converters. [Internet] [Doctoral dissertation]. University of Salford; 1970. [cited 2021 Jan 18]. Available from: http://usir.salford.ac.uk/id/eprint/43026/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.466768.

Council of Science Editors:

Naik KR. Series operation of thyristors in HVDC converters. [Doctoral Dissertation]. University of Salford; 1970. Available from: http://usir.salford.ac.uk/id/eprint/43026/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.466768

University of New South Wales

23. Moghe, Yashodhan. DC Current Measurement Systems for Neurostimulator Implants.

Degree: Electrical Engineering & Telecommunications, 2014, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/53603 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12298/SOURCE02?view=true

► This research explores methods of accurately measuring DC current flowing in a circuit sub-block or an entire chip. The major application demonstrated is a novel… (more)

▼ This research explores methods of accurately measuring DC current flowing in a circuit sub-block or an entire chip. The major application demonstrated is a novel mixed-signal system to monitor DC current imbalance on the supply/ground lines of the stimulation circuitry in a neurostimulator implant chip, which indicates a fault that may lead to dangerous levels of DC current leaking into tissue. The system can detect all known failure modes that cause leakage current including ESD damage, fluid leaks and electrode/PCB/component shorts. Furthermore, the system is agnostic of the inner workings of the stimulation circuitry it monitors, and can be applied to highly complex implants containing any number of electrodes, without having to scale circuit area and power.The system is sensitive to DC current imbalances 50-56 dB smaller than the full-scale current, programmable in the range 0.25-8mA, yielding an absolute detection sensitivity of 0.75-12uA; sufficient to make it useful in current and future implants. Static and dynamic power consumption of the system in a typical implant scenario with 10V stimulation supply are 0.22-0.49mW and 0.64-1.17mW respectively, while the supply/ground current sensors consume a total of up to 1V of stimulation voltage headroom. The trade-off between sensitivity and headroom loss can be programmed digitally, as can all other aspects of the system. Practical guidelines on integrating the system into real implant systems are given.The system was developed and tested on a mainstream 0.35um CMOS process, with care taken to ensure mass-producibility. An essential part of this was the development of 2-3ns latency HV digital level-shifters that outperform all prior designs. The supply/ground current sensor itself performed up to 22 dB better than comparable prior art. The level-shifter and the sensor have general applicability to many systems beyond neurostimulator implants. Advisors/Committee Members: Lehmann, Torsten, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW.

Subjects/Keywords: Level shifter high voltage; DC current leakage detection; Implant neurostimulator biomedical

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APA (6^th Edition):

Moghe, Y. (2014). DC Current Measurement Systems for Neurostimulator Implants. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/53603 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12298/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Moghe, Yashodhan. “DC Current Measurement Systems for Neurostimulator Implants.” 2014. Doctoral Dissertation, University of New South Wales. Accessed January 18, 2021. http://handle.unsw.edu.au/1959.4/53603 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12298/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Moghe, Yashodhan. “DC Current Measurement Systems for Neurostimulator Implants.” 2014. Web. 18 Jan 2021.

Vancouver:

Moghe Y. DC Current Measurement Systems for Neurostimulator Implants. [Internet] [Doctoral dissertation]. University of New South Wales; 2014. [cited 2021 Jan 18]. Available from: http://handle.unsw.edu.au/1959.4/53603 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12298/SOURCE02?view=true.

Council of Science Editors:

Moghe Y. DC Current Measurement Systems for Neurostimulator Implants. [Doctoral Dissertation]. University of New South Wales; 2014. Available from: http://handle.unsw.edu.au/1959.4/53603 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12298/SOURCE02?view=true

Georgia Southern University

24. Odogwu, Ifechukwude Gideon. Phase-Locked Loop Control In Low-Inertia Grid-Connected Voltage-Source Converters.

Degree: MS, Electrical Engineering, Department of Electrical and Computer Engineering, 2020, Georgia Southern University

URL: https://digitalcommons.georgiasouthern.edu/etd/2115

► As the integration of renewable energy on the grid increases, the number of voltage-source converters (VSC) installed also does. VSC controls both switch turn-on… (more)

Subjects/Keywords: Phase-Locked Loop Dynamics; Low-Inertia Grid; Voltage-Source Converter; High-Voltage Direct Current Converter; Line-Commutated Converter; Weak Grid.; Electrical and Computer Engineering; Electrical and Electronics; Engineering; Power and Energy

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APA (6^th Edition):

Odogwu, I. G. (2020). Phase-Locked Loop Control In Low-Inertia Grid-Connected Voltage-Source Converters. (Masters Thesis). Georgia Southern University. Retrieved from https://digitalcommons.georgiasouthern.edu/etd/2115

Chicago Manual of Style (16^th Edition):

Odogwu, Ifechukwude Gideon. “Phase-Locked Loop Control In Low-Inertia Grid-Connected Voltage-Source Converters.” 2020. Masters Thesis, Georgia Southern University. Accessed January 18, 2021. https://digitalcommons.georgiasouthern.edu/etd/2115.

MLA Handbook (7^th Edition):

Odogwu, Ifechukwude Gideon. “Phase-Locked Loop Control In Low-Inertia Grid-Connected Voltage-Source Converters.” 2020. Web. 18 Jan 2021.

Vancouver:

Odogwu IG. Phase-Locked Loop Control In Low-Inertia Grid-Connected Voltage-Source Converters. [Internet] [Masters thesis]. Georgia Southern University; 2020. [cited 2021 Jan 18]. Available from: https://digitalcommons.georgiasouthern.edu/etd/2115.

Council of Science Editors:

Odogwu IG. Phase-Locked Loop Control In Low-Inertia Grid-Connected Voltage-Source Converters. [Masters Thesis]. Georgia Southern University; 2020. Available from: https://digitalcommons.georgiasouthern.edu/etd/2115

Texas A&M University

25. Zhang, Haiyu. Topology and Control for Photovoltaic Microinverters.

Degree: PhD, Electrical Engineering, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/156953

► Motivated by the continuously increasing world energy demands and greenhousegas (GHG) emissions from conventional fossil fuels, renewable energy, especially solar energy is ready to become… (more)

▼ Motivated by the continuously increasing world energy demands and greenhousegas (GHG) emissions from conventional fossil fuels, renewable energy, especially solar energy is ready to become a significant part of global energy portfolio. The microinverters, as the interface between the photovoltaic (PV) modules and the ac electrical power grid, have become popular due to the potentials to achieve high reliability, improved system flexibility and enhanced electrical safety compared with the string or central inverters. Thanks to the decreasing costs and disruptive enabling technologies, they have rapidly emerged in the global residential and even commercial PV market. This dissertation proposes a two stage isolated PV microinverter comprised of dc-dc converter followed by dc-ac inverter. For the front-end dc-dc converter, the with enhancement gallium nitride filed-effect transistors (eGaN FETs) is used to achieve high voltage gain, soft switching and high frequency operation. To further explore the electrical and thermal characteristics of eGaN FETs, the driving signals of eGaN FETs with appropriate overlap are proposed and implemented to not only optimize the reverse conduction performance of eGaN FETs, but also avoid shoot-through current during dead time in single phase leg structure. To evaluate the cooling requirements in advance to ensure effective heat dissipation with minimized heat sink, a simplified thermal resistor model of eGaN FETs is proposed and verified thorugh both finite element analysis (FEA) and LabVIEW/ Multisim co-simulation. Single phase inverters are inherently subject to the double line frequency ripple power at both ac and dc sides. The general solutions that unify all existing power decoupling techniques is obtained. The component counts, energy utilization and voltage/current ripple of energy storage components, dc voltage utilizations of both main circuit and power decoupling circuit, and the current stresses of power devices in main circuit are derived and investigated. The evaluations on all existing power decoupling techniques for the two stage PV microinverters, are summarized to provide helpful guidance during design. A digitally implemented proportional resonant (PR) and hybrid hysteresis current control with soft switching in the dc-ac inverter of the two stage PV microinverters is proposed to reduced switching losses, optimize zero-crossing distortions and mitigate low frequency harmonics. Advisors/Committee Members: Balog, Robert S (advisor), Enjeti, Prasad (committee member), Bhattacharyya, Shankar P (committee member), Kim, Won-Jong (committee member).

Subjects/Keywords: photovoltaic microinverters; front-end resonant dc-dc converter; high voltage gain; soft switching; eGaN FETs; reverse conduction; loss analysis; thermal study; double line frequency; power decoupling; general solutions; dc-ac inverter; zero voltage switching; zero current switching; frequency analysis; zero-crossing distortions; low frequency harmonics; proportional resonant control; hybrid hysteresis current control

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APA (6^th Edition):

Zhang, H. (2016). Topology and Control for Photovoltaic Microinverters. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/156953

Chicago Manual of Style (16^th Edition):

Zhang, Haiyu. “Topology and Control for Photovoltaic Microinverters.” 2016. Doctoral Dissertation, Texas A&M University. Accessed January 18, 2021. http://hdl.handle.net/1969.1/156953.

MLA Handbook (7^th Edition):

Zhang, Haiyu. “Topology and Control for Photovoltaic Microinverters.” 2016. Web. 18 Jan 2021.

Vancouver:

Zhang H. Topology and Control for Photovoltaic Microinverters. [Internet] [Doctoral dissertation]. Texas A&M University; 2016. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/1969.1/156953.

Council of Science Editors:

Zhang H. Topology and Control for Photovoltaic Microinverters. [Doctoral Dissertation]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/156953

Cal Poly

26. Aarstad, Cassidy Alan. Arc Fault Circuit Interrupter Development for Residential DC Electricity.

Degree: MS, Electrical Engineering, 2016, Cal Poly

URL: https://digitalcommons.calpoly.edu/theses/1649 ; 10.15368/theses.2016.111

► The following technical report describes the development and testing of an arc fault circuit interrupter (AFCI) for DC circuits operating primarily at 48 volts.… (more)

Subjects/Keywords: Arc Fault Circuit Interrupter; AFCI; DC; Direct Current; Low Voltage; Frequency Spectrum; Power and Energy

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APA (6^th Edition):

Aarstad, C. A. (2016). Arc Fault Circuit Interrupter Development for Residential DC Electricity. (Masters Thesis). Cal Poly. Retrieved from https://digitalcommons.calpoly.edu/theses/1649 ; 10.15368/theses.2016.111

Chicago Manual of Style (16^th Edition):

Aarstad, Cassidy Alan. “Arc Fault Circuit Interrupter Development for Residential DC Electricity.” 2016. Masters Thesis, Cal Poly. Accessed January 18, 2021. https://digitalcommons.calpoly.edu/theses/1649 ; 10.15368/theses.2016.111.

MLA Handbook (7^th Edition):

Aarstad, Cassidy Alan. “Arc Fault Circuit Interrupter Development for Residential DC Electricity.” 2016. Web. 18 Jan 2021.

Vancouver:

Aarstad CA. Arc Fault Circuit Interrupter Development for Residential DC Electricity. [Internet] [Masters thesis]. Cal Poly; 2016. [cited 2021 Jan 18]. Available from: https://digitalcommons.calpoly.edu/theses/1649 ; 10.15368/theses.2016.111.

Council of Science Editors:

Aarstad CA. Arc Fault Circuit Interrupter Development for Residential DC Electricity. [Masters Thesis]. Cal Poly; 2016. Available from: https://digitalcommons.calpoly.edu/theses/1649 ; 10.15368/theses.2016.111

Cape Peninsula University of Technology

27. Giraneza, Martial. High voltage direct current (HVDC) in applications for distributed independent power providers (IPP) .

Degree: 2013, Cape Peninsula University of Technology

URL: http://etd.cput.ac.za/handle/20.500.11838/1077

► The development of power electronics did remove most of technical limitations that high voltage direct current (HVDC) used to have. HVDC, now, is mostly used… (more)

Subjects/Keywords: Electric power distribution; High-tension electric transmission; Direct-current transmission; High voltages; High voltage direct current (HVDC); Voltage source converter (VSC); VSC-HVDC; Independent power providers (IPP); Dissertations, Academic; MTech

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APA (6^th Edition):

Giraneza, M. (2013). High voltage direct current (HVDC) in applications for distributed independent power providers (IPP) . (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/1077

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Giraneza, Martial. “High voltage direct current (HVDC) in applications for distributed independent power providers (IPP) .” 2013. Thesis, Cape Peninsula University of Technology. Accessed January 18, 2021. http://etd.cput.ac.za/handle/20.500.11838/1077.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Giraneza, Martial. “High voltage direct current (HVDC) in applications for distributed independent power providers (IPP) .” 2013. Web. 18 Jan 2021.

Vancouver:

Giraneza M. High voltage direct current (HVDC) in applications for distributed independent power providers (IPP) . [Internet] [Thesis]. Cape Peninsula University of Technology; 2013. [cited 2021 Jan 18]. Available from: http://etd.cput.ac.za/handle/20.500.11838/1077.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Giraneza M. High voltage direct current (HVDC) in applications for distributed independent power providers (IPP) . [Thesis]. Cape Peninsula University of Technology; 2013. Available from: http://etd.cput.ac.za/handle/20.500.11838/1077

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Central Florida

28. Yao, Liangbin. High Current Density Low Voltage Isolated Dc-dc Converterswith Fast Transient Response.

Degree: 2007, University of Central Florida

URL: https://stars.library.ucf.edu/etd/3421

► With the rapid development of microprocessor and semiconductor technology, industry continues to update the requirements for power supplies. For telecommunication and computing system applications, power… (more)

Subjects/Keywords: dc-dc converter; power density; current density; low voltage; high current; high efficiency; half bridge; current doubler; digital control; current sharing; current tripler; rectification; transient response; Electrical and Computer Engineering; Electrical and Electronics; Engineering

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APA (6^th Edition):

Yao, L. (2007). High Current Density Low Voltage Isolated Dc-dc Converterswith Fast Transient Response. (Doctoral Dissertation). University of Central Florida. Retrieved from https://stars.library.ucf.edu/etd/3421

Chicago Manual of Style (16^th Edition):

Yao, Liangbin. “High Current Density Low Voltage Isolated Dc-dc Converterswith Fast Transient Response.” 2007. Doctoral Dissertation, University of Central Florida. Accessed January 18, 2021. https://stars.library.ucf.edu/etd/3421.

MLA Handbook (7^th Edition):

Yao, Liangbin. “High Current Density Low Voltage Isolated Dc-dc Converterswith Fast Transient Response.” 2007. Web. 18 Jan 2021.

Vancouver:

Yao L. High Current Density Low Voltage Isolated Dc-dc Converterswith Fast Transient Response. [Internet] [Doctoral dissertation]. University of Central Florida; 2007. [cited 2021 Jan 18]. Available from: https://stars.library.ucf.edu/etd/3421.

Council of Science Editors:

Yao L. High Current Density Low Voltage Isolated Dc-dc Converterswith Fast Transient Response. [Doctoral Dissertation]. University of Central Florida; 2007. Available from: https://stars.library.ucf.edu/etd/3421

Brno University of Technology

29. Jašek, František. Návrh nových aktivních filtrů pomocí grafů signálových toků: Design of new active filters, using signal flow graphs.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/5249

► This master’s thesis describes the design of the frequency filters by the help of the graph of the signal flows. There are defined by modern… (more)

Subjects/Keywords: Aktivní kmitočtový filtr; dolní propust; horní propust; pásmová propust; pásmová zádrž; napěťový mód; proudový mód; smíšený mód; proudový konvejor; napěťový konvejor; proudový sledovač; graf signálových toků.; Active frequency filter; low pass; high pass; band pass; band stop; autonomous circuit; voltage mode; current mode; hybrid mode; current conveyor; coltage conveyor; current follower; signal flow graph.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jašek, F. (2019). Návrh nových aktivních filtrů pomocí grafů signálových toků: Design of new active filters, using signal flow graphs. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/5249

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Jašek, František. “Návrh nových aktivních filtrů pomocí grafů signálových toků: Design of new active filters, using signal flow graphs.” 2019. Thesis, Brno University of Technology. Accessed January 18, 2021. http://hdl.handle.net/11012/5249.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Jašek, František. “Návrh nových aktivních filtrů pomocí grafů signálových toků: Design of new active filters, using signal flow graphs.” 2019. Web. 18 Jan 2021.

Vancouver:

Jašek F. Návrh nových aktivních filtrů pomocí grafů signálových toků: Design of new active filters, using signal flow graphs. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/11012/5249.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Jašek F. Návrh nových aktivních filtrů pomocí grafů signálových toků: Design of new active filters, using signal flow graphs. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/5249

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Anna University

30. Amuthan N. Grid code requirements and Performance of adaptive internal Model controllers for better Voltage sag ride through in doubly Fed induction generator Wind farm;.

Degree: Grid code requirements and Performance of adaptive internal Model controllers for better Voltage sag ride through in doubly Fed induction generator Wind farm, 2015, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/39092

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Renewable energy sources such as wind solar geothermal tidal and newlinebiomass are important energy sources Production of power from renewable newlineenergy promotes the economic status… (more)

Subjects/Keywords: low speed and high speed shafts; Voltage Sag Ride Through

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

N, A. (2015). Grid code requirements and Performance of adaptive internal Model controllers for better Voltage sag ride through in doubly Fed induction generator Wind farm;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/39092

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

N, Amuthan. “Grid code requirements and Performance of adaptive internal Model controllers for better Voltage sag ride through in doubly Fed induction generator Wind farm;.” 2015. Thesis, Anna University. Accessed January 18, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/39092.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

N, Amuthan. “Grid code requirements and Performance of adaptive internal Model controllers for better Voltage sag ride through in doubly Fed induction generator Wind farm;.” 2015. Web. 18 Jan 2021.

Vancouver:

N A. Grid code requirements and Performance of adaptive internal Model controllers for better Voltage sag ride through in doubly Fed induction generator Wind farm;. [Internet] [Thesis]. Anna University; 2015. [cited 2021 Jan 18]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/39092.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

N A. Grid code requirements and Performance of adaptive internal Model controllers for better Voltage sag ride through in doubly Fed induction generator Wind farm;. [Thesis]. Anna University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/39092

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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