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You searched for subject:(Perturb AND observe). Showing records 1 – 2 of 2 total matches.

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Brno University of Technology

1. Uhlíř, Marcel. MPPT regulátor systému fotovoltaické elektrárny s inteligentním managementem baterií: MPPT regulator of photovoltaic power plant with smart battery management.

Degree: 2020, Brno University of Technology

The thesis deals with design of photovoltaic controller using MPPT technology based on Perturb & Observe algorithm extended by fuzzy logic processing. The converted energy is stored in a battery system with an optional voltage 12 V or 24 V. The battery system is provided by intelligent battery management, which allows to use a voltage balancer and desulphation. The whole system can be powered by external power supply, which is used to charge the batteries if there is the absence of photovoltaic energy. The device contains 12 V and 5 V outputs for connecting external devices. Through USB and Ethernet interfaces, it communicates with utility software that allows user to configure controller parameters and display battery system values. The purpose of this work is directed to the field of portable island systems for use in residential vans or caravans. Advisors/Committee Members: Háze, Jiří (advisor), Boušek, Jaroslav (referee).

Subjects/Keywords: Fotovoltaický panel; fotovoltaická elektrárna; fotovoltaický regulátor; MPPT; odchyl a vyhodnoť; fuzzy logika; soběstačný systém; Photovoltaic panel; photovoltaic power plant; photovoltaic controller; MPPT; perturb and observe; fuzzy logic; self-sufficient system

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

APA (6th Edition):

Uhlíř, M. (2020). MPPT regulátor systému fotovoltaické elektrárny s inteligentním managementem baterií: MPPT regulator of photovoltaic power plant with smart battery management. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/190536

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

Chicago Manual of Style (16th Edition):

Uhlíř, Marcel. “MPPT regulátor systému fotovoltaické elektrárny s inteligentním managementem baterií: MPPT regulator of photovoltaic power plant with smart battery management.” 2020. Thesis, Brno University of Technology. Accessed December 03, 2020. http://hdl.handle.net/11012/190536.

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

MLA Handbook (7th Edition):

Uhlíř, Marcel. “MPPT regulátor systému fotovoltaické elektrárny s inteligentním managementem baterií: MPPT regulator of photovoltaic power plant with smart battery management.” 2020. Web. 03 Dec 2020.

Vancouver:

Uhlíř M. MPPT regulátor systému fotovoltaické elektrárny s inteligentním managementem baterií: MPPT regulator of photovoltaic power plant with smart battery management. [Internet] [Thesis]. Brno University of Technology; 2020. [cited 2020 Dec 03]. Available from: http://hdl.handle.net/11012/190536.

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

Council of Science Editors:

Uhlíř M. MPPT regulátor systému fotovoltaické elektrárny s inteligentním managementem baterií: MPPT regulator of photovoltaic power plant with smart battery management. [Thesis]. Brno University of Technology; 2020. Available from: http://hdl.handle.net/11012/190536

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


Robert Gordon University

2. Hebala, Osama Mohamed. Design and analysis of current stress minimalisation controllers in multi-active bridge DC-DC converters.

Degree: PhD, 2020, Robert Gordon University

Multi active bridge (MAB) DC-DC converters have attracted significant research attention in power conversion applications within DC microgrids, medium voltage DC and high voltage DC transmission systems. This is encouraged by MAB's several functionalities such as DC voltage stepping/matching, bidirectional power flow regulation and DC fault isolation. In that sense this family of DC-DC converters is similar to AC transformers in AC grids and are hence called DC transformers. However, DC transformers are generally less efficient compared to AC transformers, due to the introduction of power electronics. Moreover, the control scheme design is challenging in DC transformers, due to its nonlinear characteristics and multi degrees of freedom introduced by the phase shift control technique of the converter bridges. The main purpose of this research is to devise control techniques that enhance the conversion efficiency of DC transformers via the minimisation of current stresses. This is achieved by designing two generalised controllers that minimise current stresses in MAB DC transformers. The first controller is for a dual active bridge (DAB). This is the simplest form of MAB, where particle swarm optimisation (PSO) is implemented offline to obtain optimal triple phase shift (TPS) parameters, for minimising the RMS current. This is achieved by applying PSO on DAB steady-state model, with generic per unit expressions of converter AC RMS current and transferred power under all possible switching modes. Analysing the generic data pool generated by the offline PSO algorithm enabled the design of a generic real-time closed-loop PI-based controller. The proposed control scheme achieves bidirectional active power regulation in DAB over the 1 to -1 pu power range with minimum-RMS-current for buck/boost/unity modes, without the need for online optimisation or memory-consuming look-up tables. Extending the same controller design procedure for MAB was deemed not feasible, as it would involve a highly complex PSO exercise that is difficult to generalise for N number of bridges; it would therefore generate a massive data pool that would be quite cumbersome to analyse and generalise. For this reason, a second controller is developed for MAB converter without using a converter-based model, where current stress is minimised and active power is regulated. This is achieved through a new real-time minimum-current point-tracking (MCPT) algorithm, which realises iterative-based optimisation search using adaptive-step perturb and observe (P&O) method. Active power is regulated in each converter bridge using a new power decoupler algorithm. The proposed controller is generalised to MAB regardless of the number of ports, power level and values of DC voltage ratios between the different ports. Therefore, it does not require an extensive look-up table for implementation, the need for complex non-linear converter modelling and it is not circuit parameter-dependent. The main disadvantages of this proposed controller are the slightly slow transient…

Subjects/Keywords: RMS current stress; Current stress; Multi-active bridge (MAB); Dual-active bridge (DAB); Particle swarm optimisation (PSO); Triple-phase shift (TPS); Perturb and observe (P&O); Minimum-current point-tracking (MCPT)

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

APA (6th Edition):

Hebala, O. M. (2020). Design and analysis of current stress minimalisation controllers in multi-active bridge DC-DC converters. (Doctoral Dissertation). Robert Gordon University. Retrieved from https://rgu-repository.worktribe.com/output/950481 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.809656

Chicago Manual of Style (16th Edition):

Hebala, Osama Mohamed. “Design and analysis of current stress minimalisation controllers in multi-active bridge DC-DC converters.” 2020. Doctoral Dissertation, Robert Gordon University. Accessed December 03, 2020. https://rgu-repository.worktribe.com/output/950481 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.809656.

MLA Handbook (7th Edition):

Hebala, Osama Mohamed. “Design and analysis of current stress minimalisation controllers in multi-active bridge DC-DC converters.” 2020. Web. 03 Dec 2020.

Vancouver:

Hebala OM. Design and analysis of current stress minimalisation controllers in multi-active bridge DC-DC converters. [Internet] [Doctoral dissertation]. Robert Gordon University; 2020. [cited 2020 Dec 03]. Available from: https://rgu-repository.worktribe.com/output/950481 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.809656.

Council of Science Editors:

Hebala OM. Design and analysis of current stress minimalisation controllers in multi-active bridge DC-DC converters. [Doctoral Dissertation]. Robert Gordon University; 2020. Available from: https://rgu-repository.worktribe.com/output/950481 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.809656

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