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Oregon State University
1.
Cicilio, Phylicia.
Dynamic Load Model Placement and Development with Case Study of Microgrid in Nome, Alaska.
Degree: MS, 2017, Oregon State University
URL: http://hdl.handle.net/1957/61896 
► Dynamic modeling is key to the successful operation and reliability of electrical grids by evaluating transient stability. Developing dynamic load models and identifying where they…
(more)
▼ Dynamic modeling is key to the successful operation and reliability of electrical grids by evaluating transient stability. Developing dynamic load models and identifying where they are necessary is a challenging task as loads are an aggregation of individual devices that change throughout the year. This thesis investigates how to develop those load models and provides preliminary guidelines for where to prioritize placement of dynamic load models in the system.
A case study in Nome, Alaska is performed on developing a dynamic load model for their microgrid. Electricity cost in Alaska's rural communities reaches up to five times higher than the national average. Theses rural communities' microgrids are powered primarily by diesel generators causing high electricity costs. This thesis examines the community of Nome, Alaska which has installed wind turbines to combat their dependency on diesel. Intermittent generation from the wind turbines can compromise the grid's resiliency and reliability. Dynamic modeling and reliability analysis are necessary to analyze possible solutions for stabilizing the grid. Adequate fidelity for the load model is necessary to perform dynamic simulations. A static ZIP load model and composite load model are created in this paper and are compared for improved modelling. Additionally, this load benchmark is used to evaluate the integration of an energy storage device to Nome's microgrid for improved transient stability. Using the composite load model in the microgrid model, a battery is modeled using the PSS/E CBEST energy storage model, demonstrating the transient stability improvement provided by installing an energy storage device to the grid. Any microgrid utility, such as in Nome, Alaska, can adapt and use this load model development process depending on available computation resources and necessary data resolution for a particular generation and demand portfolio.
Advisors/Committee Members: Sanchez%2C%20Eduardo%22%29&pagesize-30">
Cotilla-
Sanchez,
Eduardo (advisor),
Brekken, Ted (committee member).
Subjects/Keywords: power systems
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APA (6th Edition):
Cicilio, P. (2017). Dynamic Load Model Placement and Development with Case Study of Microgrid in Nome, Alaska. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/61896
Chicago Manual of Style (16th Edition):
Cicilio, Phylicia. “Dynamic Load Model Placement and Development with Case Study of Microgrid in Nome, Alaska.” 2017. Masters Thesis, Oregon State University. Accessed April 22, 2021.
http://hdl.handle.net/1957/61896.
MLA Handbook (7th Edition):
Cicilio, Phylicia. “Dynamic Load Model Placement and Development with Case Study of Microgrid in Nome, Alaska.” 2017. Web. 22 Apr 2021.
Vancouver:
Cicilio P. Dynamic Load Model Placement and Development with Case Study of Microgrid in Nome, Alaska. [Internet] [Masters thesis]. Oregon State University; 2017. [cited 2021 Apr 22].
Available from: http://hdl.handle.net/1957/61896.
Council of Science Editors:
Cicilio P. Dynamic Load Model Placement and Development with Case Study of Microgrid in Nome, Alaska. [Masters Thesis]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/61896
Oregon State University
2.
Muñoz Constantine, Juan Pablo.
Grid Voltage Frequency Estimation Using an Adaptive Complex Master-Slave Unscented Kalman Filter.
Degree: MS, Electrical and Computer Engineering, 2015, Oregon State University
URL: http://hdl.handle.net/1957/57444
► Due to the popularity of electronically controlled loads and the widespread use of alternative energy sources such as wind turbines and solar cells, the power…
(more)
▼ Due to the popularity of electronically controlled loads and the widespread use of alternative energy sources such as wind turbines and solar cells, the power quality at the distribution level must be carefully monitored. One of the many different means to monitor power quality is through frequency measurements. Nonlinearities cause harmonic generation effectively distorting the signals seen at the load, and so this seemingly simple task becomes a challenge. Recent advances in digital computing have allowed powerful linear estimators like the Kalman filter (KF) to be widely implemented for frequency estimation. In real physical applications, systems exhibit nonlinear behavior raising the need to adapt the Kalman Filter to fit nonlinear models. The Extended Kalman Filter (EKF) deals with nonlinearities in the system by linearizing the model around a known
state. However, this makes the estimation process inaccurate because second order or higher nonlinearities are neglected.
The recently developed Unscented Kalman filter (UKF) takes advantage of the Unscented Transformation (UT) to deal with nonlinear models without the need of linearization and with the same computational complexity as the EKF. However, any variations of the Kalman filter exhibit a very similar robustness problem when modeling uncertainty and are also sensitive to initial conditions. In order to overcome these limitations, an improved UKF algorithm based on the theory of strong tracking filters (STF) has been developed. If tuned properly, this new algorithm improves tracking for sudden changes and avoids divergence. However, if the process and/or measurement noise change with time, the filter will not estimate with the same accuracy it was tuned for. This thesis work proposes an adaptive algorithm based on an Unscented Kalman Filter (UKF), in order to improve the frequency estimation of power signals which undergo changes and are corrupted by white noise. The adaptive algorithm is based on a Master-Slave configuration, where the "master" estimates the
state and the "slave", which operates in parallel, estimates the noise covariance matrix. Since the voltage signal is less distorted than the current signal, the former is employed to derive a complex
state-space model to estimate the fundamental frequency. In order to evaluate the performance of the proposed algorithm, several simulations with synthetic data are implemented.
Advisors/Committee Members: Magana, Mario E. (advisor), Sanchez%2C%20Eduardo%22%29&pagesize-30">
Cotilla-
Sanchez,
Eduardo (committee member).
Subjects/Keywords: Unscented; Kalman filtering
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APA (6th Edition):
Muñoz Constantine, J. P. (2015). Grid Voltage Frequency Estimation Using an Adaptive Complex Master-Slave Unscented Kalman Filter. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/57444
Chicago Manual of Style (16th Edition):
Muñoz Constantine, Juan Pablo. “Grid Voltage Frequency Estimation Using an Adaptive Complex Master-Slave Unscented Kalman Filter.” 2015. Masters Thesis, Oregon State University. Accessed April 22, 2021.
http://hdl.handle.net/1957/57444.
MLA Handbook (7th Edition):
Muñoz Constantine, Juan Pablo. “Grid Voltage Frequency Estimation Using an Adaptive Complex Master-Slave Unscented Kalman Filter.” 2015. Web. 22 Apr 2021.
Vancouver:
Muñoz Constantine JP. Grid Voltage Frequency Estimation Using an Adaptive Complex Master-Slave Unscented Kalman Filter. [Internet] [Masters thesis]. Oregon State University; 2015. [cited 2021 Apr 22].
Available from: http://hdl.handle.net/1957/57444.
Council of Science Editors:
Muñoz Constantine JP. Grid Voltage Frequency Estimation Using an Adaptive Complex Master-Slave Unscented Kalman Filter. [Masters Thesis]. Oregon State University; 2015. Available from: http://hdl.handle.net/1957/57444
Oregon State University
3.
Li, Qianyun.
Electric Machine Capability Characterization for Actuators in Disaster Response Robots.
Degree: MS, Electrical and Computer Engineering, 2016, Oregon State University
URL: http://hdl.handle.net/1957/59396
► Disaster response robots need to be simultaneously able to survive extreme environment and complete the mission efficiently and robustly. One of the determinants is the…
(more)
▼ Disaster response robots need to be simultaneously able to survive extreme environment
and complete the mission efficiently and robustly. One of the determinants is
the performance of the actuators in each joint, which drive the robot to the desired
motion accurately. In robotics society, people usually build their robots directly using
off-the-shelf motor according to the maximum torque and speed they need and the
capability of the motors. Without appropriate torque-speed characteristic, the actuators
will fail to get to their designated position with enough torque and speed. This
thesis simulated different situations that a disaster response robot would encounter,
and the toque-speed characteristic that a motor need for each different joint of the
lower body of a robot in various motion. Forward and inverse kinematic have been
calculated to analyze the dynamic movement of the robot. Command trajectories
have been generated according to human biomechanics and justified by Zero Moment
Point (ZMP) criteria in order to keep the equilibrium of the robot. There is a
servomotor attached to every one degree-of-freedom (DoF) joint to simulate a perfect
actuator ensuring the joint following the desired trajectory. This thesis achieved
keeping the robot stable at all time and found out the torque-speed characteristic
required to act as an ankle, knee, or hip actuator.
Advisors/Committee Members: Zhang, Julia (advisor), Sanchez%2C%20Eduardo%20J.%22%29&pagesize-30">
Cotilla-
Sanchez,
Eduardo J. (committee member).
Subjects/Keywords: Capability; Actuators
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APA (6th Edition):
Li, Q. (2016). Electric Machine Capability Characterization for Actuators in Disaster Response Robots. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/59396
Chicago Manual of Style (16th Edition):
Li, Qianyun. “Electric Machine Capability Characterization for Actuators in Disaster Response Robots.” 2016. Masters Thesis, Oregon State University. Accessed April 22, 2021.
http://hdl.handle.net/1957/59396.
MLA Handbook (7th Edition):
Li, Qianyun. “Electric Machine Capability Characterization for Actuators in Disaster Response Robots.” 2016. Web. 22 Apr 2021.
Vancouver:
Li Q. Electric Machine Capability Characterization for Actuators in Disaster Response Robots. [Internet] [Masters thesis]. Oregon State University; 2016. [cited 2021 Apr 22].
Available from: http://hdl.handle.net/1957/59396.
Council of Science Editors:
Li Q. Electric Machine Capability Characterization for Actuators in Disaster Response Robots. [Masters Thesis]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/59396
Oregon State University
4.
AL-Anazi, Falah.
Determining The Impact of Photovoltaic Generation on Power Systems.
Degree: MS, Electrical and Computer Engineering, 2016, Oregon State University
URL: http://hdl.handle.net/1957/59429
► The National Conference of State Legislatures NCSL declares that 29 states have been active in adopting and increasing renewable portfolio standards. Present renewable portfolio standards…
(more)
▼ The National Conference of
State Legislatures NCSL declares that 29 states have
been active in adopting and increasing renewable portfolio standards. Present
renewable portfolio standards require utilities to increase integration of renewable
energy sources such as photovoltaic (PV). The increased penetration of PV systems
is expected to destabilize the power system. Therefore, this thesis studies the
steady
state voltage of Western Electric Coordinating Council (WECC) as the
penetration level of the PV system increases to find the point where the penetration
level makes the system unstable. In addition, this study serves to pinpoint the
violated transmission lines as the penetration level increases, while also identifying
why this violation occurs. The study is divided into two scenarios: integration of a
rooftop only PV system at unity power factor and integration of both rooftop and
utility scale PV systems. The study uses MATpower simulation program to solve
the system power flow for each scenario. The results show that when we integrate a
rooftop only PV system, the steady
state voltage in the light loaded buses becomes
unstable as the penetration level increases. However, integrating both rooftop and
utility scale PV systems enhance the system stability. Also, the transmission line
violations are observed while PV system penetration level increases.
Advisors/Committee Members: Brekken, Ted (advisor), Sanchez%2C%20Eduardo%22%29&pagesize-30">
Cotilla-
Sanchez,
Eduardo (committee member).
Subjects/Keywords: PV; Photovoltaic power generation
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Manager
APA (6th Edition):
AL-Anazi, F. (2016). Determining The Impact of Photovoltaic Generation on Power Systems. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/59429
Chicago Manual of Style (16th Edition):
AL-Anazi, Falah. “Determining The Impact of Photovoltaic Generation on Power Systems.” 2016. Masters Thesis, Oregon State University. Accessed April 22, 2021.
http://hdl.handle.net/1957/59429.
MLA Handbook (7th Edition):
AL-Anazi, Falah. “Determining The Impact of Photovoltaic Generation on Power Systems.” 2016. Web. 22 Apr 2021.
Vancouver:
AL-Anazi F. Determining The Impact of Photovoltaic Generation on Power Systems. [Internet] [Masters thesis]. Oregon State University; 2016. [cited 2021 Apr 22].
Available from: http://hdl.handle.net/1957/59429.
Council of Science Editors:
AL-Anazi F. Determining The Impact of Photovoltaic Generation on Power Systems. [Masters Thesis]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/59429
Oregon State University
5.
Patapanchala, Panini Sai.
Exploring Security Metrics for Electric Grid Infrastructure Leveraging Attack Graphs.
Degree: MS, Computer Science, 2016, Oregon State University
URL: http://hdl.handle.net/1957/59808
► Electric grid is a critical cyber-physical infrastructure that serves as lifeline for modern society. With the increasing trend of cyber-attacks, electric grid security has become…
(more)
▼ Electric grid is a critical cyber-physical infrastructure that serves as lifeline for modern society. With the increasing trend of cyber-attacks, electric grid security has become a significant concern. Electric grid operators are working hard to reduce the risk of these attacks towards the system. Having security metrics for monitoring the risk to the cyber-physical power grid infrastructures would be very helpful to grid operators. However, security metrics to assess the security posture or risk to enterprise networks have been a long standing challenge. Cyber-physical systems (CPS) that have interconnected cyber and physical infrastructure add an additional layer of complexity. In this thesis work, we explore some security metrics that can be used to monitor the security posture and risk to CPS. These metrics take both the cyber security posture and physical impact of an attack in to account. We focused on both individual and coordinated attacks that can cause cascading outages. To evaluate these metrics, we created cyber physical models for 9-bus, 39-bus and RTS-96 power system models using the previously developed Cyber Physical Security Assessment (CyPSA) framework. Our metrics provide a novel way to identify and prioritize assets critical to the system and help operators take steps to improve the overall security posture of the system.
Advisors/Committee Members: Bobba, Rakesh B. (advisor), Sanchez%2C%20Eduardo%22%29&pagesize-30">
Cotilla-
Sanchez,
Eduardo (committee member).
Subjects/Keywords: cyber physical system; Cooperating objects (Computer systems) – Security measures
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APA ·
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Manager
APA (6th Edition):
Patapanchala, P. S. (2016). Exploring Security Metrics for Electric Grid Infrastructure Leveraging Attack Graphs. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/59808
Chicago Manual of Style (16th Edition):
Patapanchala, Panini Sai. “Exploring Security Metrics for Electric Grid Infrastructure Leveraging Attack Graphs.” 2016. Masters Thesis, Oregon State University. Accessed April 22, 2021.
http://hdl.handle.net/1957/59808.
MLA Handbook (7th Edition):
Patapanchala, Panini Sai. “Exploring Security Metrics for Electric Grid Infrastructure Leveraging Attack Graphs.” 2016. Web. 22 Apr 2021.
Vancouver:
Patapanchala PS. Exploring Security Metrics for Electric Grid Infrastructure Leveraging Attack Graphs. [Internet] [Masters thesis]. Oregon State University; 2016. [cited 2021 Apr 22].
Available from: http://hdl.handle.net/1957/59808.
Council of Science Editors:
Patapanchala PS. Exploring Security Metrics for Electric Grid Infrastructure Leveraging Attack Graphs. [Masters Thesis]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/59808
Oregon State University
6.
So, Ratanak.
Validation of Wave Energy Converter Models and the Development of Control Strategies in WEC-Sim.
Degree: PhD, 2017, Oregon State University
URL: http://hdl.handle.net/1957/61645
► When the term "renewable energy" is mentioned in a conversation, wind, solar, and hydro energy typically come to mind. However, there is one major resource…
(more)
▼ When the term "renewable energy" is mentioned in a conversation, wind, solar, and hydro energy typically come to mind. However, there is one major resource that has remained mostly untapped: wave energy. Wind and solar power technologies are well established around the world but they cannot generate electricity all the time; wind is not always blowing and the sun is not always shining. An advantage of ocean wave power is that it is generally more predictable. Furthermore, water is significantly denser – about 800 times – compared to air, so it can carry more energy than wind per volume. A meter wide of incident wave front can provide about 40 kW (along the coast of
Oregon or Washington) which can power about 20 homes. A coastline of length 50 km translates to 2 GW of capacity (approximately 1 million homes) which is equivalent to a large hydroelectric power plant in the U.S. The details of the work presented herein is 1) a comparison of a wave energy converter's (WEC) field test performance to a simulated expected results of the same device using WEC-Sim, an open-source simulator; 2) a comparison of a tank test performance of an oscillating water column and simulation results of a point absorber using WEC-Sim; and 3) development of model predictive control (MPC), latching & declutching, and linear quadratic Gaussian regulator (LQG) control strategies for WEC-Sim.
Advisors/Committee Members: Brekken, Ted (advisor), Sanchez%2C%20Eduardo%22%29&pagesize-30">
Cotilla-
Sanchez,
Eduardo (committee member).
Subjects/Keywords: Validation
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APA (6th Edition):
So, R. (2017). Validation of Wave Energy Converter Models and the Development of Control Strategies in WEC-Sim. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/61645
Chicago Manual of Style (16th Edition):
So, Ratanak. “Validation of Wave Energy Converter Models and the Development of Control Strategies in WEC-Sim.” 2017. Doctoral Dissertation, Oregon State University. Accessed April 22, 2021.
http://hdl.handle.net/1957/61645.
MLA Handbook (7th Edition):
So, Ratanak. “Validation of Wave Energy Converter Models and the Development of Control Strategies in WEC-Sim.” 2017. Web. 22 Apr 2021.
Vancouver:
So R. Validation of Wave Energy Converter Models and the Development of Control Strategies in WEC-Sim. [Internet] [Doctoral dissertation]. Oregon State University; 2017. [cited 2021 Apr 22].
Available from: http://hdl.handle.net/1957/61645.
Council of Science Editors:
So R. Validation of Wave Energy Converter Models and the Development of Control Strategies in WEC-Sim. [Doctoral Dissertation]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/61645
Oregon State University
7.
Bonner IV, L Roy.
Using EarthScope Magnetotelluric Data to Improve the Resilience of the US Power Grid: Rapid Predictions of Geomagnetically Induced Currents.
Degree: MS, 2017, Oregon State University
URL: http://hdl.handle.net/1957/61517
► Geomagnetically Induced Currents (GICs) are quasi-DC signals that are induced in the ground during geomagnetic disturbances (GMDs) and pose a large threat to power grid…
(more)
▼ Geomagnetically Induced Currents (GICs) are quasi-DC signals that are induced in the ground during geomagnetic disturbances (GMDs) and pose a large threat to power grid infrastructure. The power industry currently attempts to mitigate GIC effects by utilizing 1-D ground electrical conductivity based electric field predictions, though conductivity can vary in all 3 spatial dimensions by at least 3 orders of magnitude. These variations can cause predictions to deviate from measured values greatly, which suggests that the resulting GIC predictions can be highly incorrect in areas of conductive heterogeneity. 3-D computational techniques, such as solving Maxwell’s equations for electric fields associated with GMDs, can improve prediction accuracy, though they are currently too computationally intensive and slow for industrial use. A computationally light algorithm that implements 3-D magnetotelluric data is proposed and compared to the industry standard method for both electric field and GIC predictions. The algorithm, which is called the Cascading Linear Filter Algorithm (CLFA), utilizes concurrent magnetic time series data from publicly available NSF EarthScope Program sites and United States Geological Survey magnetic observatories to construct observatory-to-site transfer functions. These transfer functions project real-time magnetic field observatory data into predictions for sites within the EarthScope array. Real-time site magnetic field predictions are then projected through 3-D site impedances to yield real-time electric field predictions, which can be interpolated onto points representing the tested power system. GIC based parameters for the power system, and the corresponding electric field at points along the system, are then input into power flow solvers to obtain GIC predictions. Electric field predictions for the CLFA and industry standard method are compared to measured site values to assess the accuracy of both techniques, and limitations are addressed. GIC predictions resulting from both electric field prediction methods are also compared for three test cases to estimate the impact of implementing the CLFA method on power grid resilience.
Advisors/Committee Members: Schultz, Adam (advisor), Sanchez%2C%20Eduardo%22%29&pagesize-30">
Cotilla-
Sanchez,
Eduardo (committee member).
Subjects/Keywords: GIC
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APA ·
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Manager
APA (6th Edition):
Bonner IV, L. R. (2017). Using EarthScope Magnetotelluric Data to Improve the Resilience of the US Power Grid: Rapid Predictions of Geomagnetically Induced Currents. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/61517
Chicago Manual of Style (16th Edition):
Bonner IV, L Roy. “Using EarthScope Magnetotelluric Data to Improve the Resilience of the US Power Grid: Rapid Predictions of Geomagnetically Induced Currents.” 2017. Masters Thesis, Oregon State University. Accessed April 22, 2021.
http://hdl.handle.net/1957/61517.
MLA Handbook (7th Edition):
Bonner IV, L Roy. “Using EarthScope Magnetotelluric Data to Improve the Resilience of the US Power Grid: Rapid Predictions of Geomagnetically Induced Currents.” 2017. Web. 22 Apr 2021.
Vancouver:
Bonner IV LR. Using EarthScope Magnetotelluric Data to Improve the Resilience of the US Power Grid: Rapid Predictions of Geomagnetically Induced Currents. [Internet] [Masters thesis]. Oregon State University; 2017. [cited 2021 Apr 22].
Available from: http://hdl.handle.net/1957/61517.
Council of Science Editors:
Bonner IV LR. Using EarthScope Magnetotelluric Data to Improve the Resilience of the US Power Grid: Rapid Predictions of Geomagnetically Induced Currents. [Masters Thesis]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/61517
Oregon State University
8.
Lassetter, Carter.
Analysis of Learning Schemes for Power Systems Secure Control.
Degree: MS, 2017, Oregon State University
URL: http://hdl.handle.net/1957/61559
► As the future electrical power systems tend towards smarter and greener technology, the deployment of self-sufficient networks, or microgrids, becomes more likely. Microgrids may operate…
(more)
▼ As the future electrical power systems tend towards smarter and greener technology, the
deployment of self-sufficient networks, or microgrids, becomes more likely. Microgrids
may operate on their own or synchronized with the main grid, thus control methods
need to take into account islanding and reconnecting said networks. Isolation of subnetworks may be necessary to protect either the main grid or the subnetworks themselves.
With the ever growing concern of cyber-attacks on power systems, the ability to isolate
network locations potentially targeted by adversaries, or exhibiting signs of cascading
failures, is necessary. It is possible to create unique attacks that may leverage network
operating points to maximize damage to the main grid even when the attack is confined
to a microgrid. Upon isolation of a subnetwork, a control technique must be used to
safely reconnect it to the main grid. The ability to optimally and safely reconnect a
portion of the grid is not well understood and, as of now, limited to raw synchronization
between interconnection points. A support vector machine (SVM) leveraging real-time
data from phasor measurement units (PMUs) is proposed to predict in real time whether
the reconnection of a sub-network to the main grid would lead to stability or instability. A dynamics simulator fed with pre-acquired system parameters is used to create
training data for the SVM in various operating states. The classifier was tested on a
variety of cases and operating points to ensure diversity. Accuracies of approximately
85% were observed throughout most conditions when making dynamic predictions of a
given network.
Advisors/Committee Members: Sanchez%2C%20Eduardo%22%29&pagesize-30">
Cotilla-
Sanchez,
Eduardo (advisor),
Parrish, Christopher (committee member).
Subjects/Keywords: PMU
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APA (6th Edition):
Lassetter, C. (2017). Analysis of Learning Schemes for Power Systems Secure Control. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/61559
Chicago Manual of Style (16th Edition):
Lassetter, Carter. “Analysis of Learning Schemes for Power Systems Secure Control.” 2017. Masters Thesis, Oregon State University. Accessed April 22, 2021.
http://hdl.handle.net/1957/61559.
MLA Handbook (7th Edition):
Lassetter, Carter. “Analysis of Learning Schemes for Power Systems Secure Control.” 2017. Web. 22 Apr 2021.
Vancouver:
Lassetter C. Analysis of Learning Schemes for Power Systems Secure Control. [Internet] [Masters thesis]. Oregon State University; 2017. [cited 2021 Apr 22].
Available from: http://hdl.handle.net/1957/61559.
Council of Science Editors:
Lassetter C. Analysis of Learning Schemes for Power Systems Secure Control. [Masters Thesis]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/61559
9.
Huo, Chen.
A Microgrid Design Case Study : Synchrophasor Placement and Development of a Protection Laboratory for the Oregon State University - Corvallis Campus.
Degree: MS, Electrical and Computer Engineering, 2015, Oregon State University
URL: http://hdl.handle.net/1957/56132
► In the past two years, Oregon State University (OSU) Corvallis campus suffered several power outages. The estimated cost of one of those outages was close…
(more)
▼ In the past two years,
Oregon State University (OSU) Corvallis campus suffered several power outages. The estimated cost of one of those outages was close to a million dollars worth of equipment and impact on research projects. Meanwhile, the campus grid operates with severely aging power assets. The reliability of campus grid operations impact students, faculty and staff and is becoming a general concern. The
university, as many other institutions that have critical loads within particularly weak power system areas, is seeking for a sustainable solution in order to cope with these reliability issues.
Moreover, due to the fast speed of power system upgrades, integration of renewable energy resources, increasing demands for grid reliability, and aging and retiring infrastructure, there is a growing set of operational and hands-on requirements for the power system students who graduate from the college. Based on the feedback from job interviews and the local industry, utilities are more willing to hire students that familiar with both hardware and software operation of modern power system.
Motivated by the challenges described above, we propose two complementary research efforts: a microgrid synchrophasor placement approach, and the design of a power system protection laboratory. OSU campus grid is supported by the main grid with several feeders. There is an advanced cogeneration facility, and two large photovoltaic arrays inside the campus and owned by OSU. Also, many buildings are equipped with smart meters and energy management systems. Therefore, the campus grid has the potential to operate itself as a microgrid. Before applying microgrids technology to the OSU campus grid, the topic of optimization of synchrophasors placement will be an important initial step.
In addition, for a microprocessor-based relay, which is widely used in a typical microgrid, the principle and function are the main contents for the new power system curriculum. It is also including the coordination between multiple relays in both a radial system and a looped system by using a software that widely used in industry area. By using the relay testing system, an advanced microprocessor-based relay, which is commonly used in industry, will be tested as well.
Advisors/Committee Members: Sanchez%2C%20Eduardo%22%29&pagesize-30">
Cotilla-
Sanchez,
Eduardo (advisor),
Brekken, Ted (committee member).
Subjects/Keywords: Synchrophasor; Electric power failures – Prevention – Oregon – Corvallis
…Synchrophasor Placement for the Oregon State University Campus Microgrid 23
3.1 Methodology… …Ohio State University, Oregon State University,
and others, are developing their own campus… …outcomes
a, b, d, and g.
23
Chapter 3: Synchrophasor Placement for the Oregon State University… …1.2.1 Synchrophasor Technology . . . . . . . . . . . . . . . . . . . .
1.2.2 Oregon State… …Layout of aging transformers in OSU campus. . . . . . . . . . . . . .
13
1.5
Oregon State…
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APA (6th Edition):
Huo, C. (2015). A Microgrid Design Case Study : Synchrophasor Placement and Development of a Protection Laboratory for the Oregon State University - Corvallis Campus. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/56132
Chicago Manual of Style (16th Edition):
Huo, Chen. “A Microgrid Design Case Study : Synchrophasor Placement and Development of a Protection Laboratory for the Oregon State University - Corvallis Campus.” 2015. Masters Thesis, Oregon State University. Accessed April 22, 2021.
http://hdl.handle.net/1957/56132.
MLA Handbook (7th Edition):
Huo, Chen. “A Microgrid Design Case Study : Synchrophasor Placement and Development of a Protection Laboratory for the Oregon State University - Corvallis Campus.” 2015. Web. 22 Apr 2021.
Vancouver:
Huo C. A Microgrid Design Case Study : Synchrophasor Placement and Development of a Protection Laboratory for the Oregon State University - Corvallis Campus. [Internet] [Masters thesis]. Oregon State University; 2015. [cited 2021 Apr 22].
Available from: http://hdl.handle.net/1957/56132.
Council of Science Editors:
Huo C. A Microgrid Design Case Study : Synchrophasor Placement and Development of a Protection Laboratory for the Oregon State University - Corvallis Campus. [Masters Thesis]. Oregon State University; 2015. Available from: http://hdl.handle.net/1957/56132
10.
Meier, Richard John.
Toward Automated Decision-Making in Power Systems Wide-Area Protection.
Degree: MS, Electrical and Computer Engineering, 2015, Oregon State University
URL: http://hdl.handle.net/1957/56382
► In recent years there have been many improvements in the reliability of critical infrastructure systems. Despite these improvements and despite targeted efforts to improve the…
(more)
▼ In recent years there have been many improvements in the reliability of critical infrastructure systems. Despite these improvements and despite targeted efforts to improve the operation and control of the electric grid, the power systems industry has seen relatively small advances in this regard. For instance, today's power system is increasingly affected by power quality deficiencies, a high number of local and regional contingencies, malfunctions in equipment, and severe emergency cascading outages. This research proposes an automated decision-making framework for protecting the power network from such events. Because automated responses to emergency situations are dependent on an observable system, this work first proposes a synchrophasor data analysis methodology that leverages statistical correlation techniques in order to identify data inconsistencies, power system events, and malicious cyber-attacks. The results of this preliminary identification method show that decorrelation of PMU data streams around a network may be a valid means of initiating further automated protection and control.
Assuming a robust and automated wide-area monitoring methodology, this research also proposes a novel, algorithmic approach to selecting Remedial Action Schemes (RASs) in order to optimize the operation of the power network during and after a contingency. Specifically, this work implements an algorithm called policy-switching to consolidate traditional load shedding and islanding schemes into a robust protection policy. In order to model and simulate the functionality of the proposed power systems protection algorithm, this work conducts Monte-Carlo, time-domain simulations using Siemens PSS/E. The algorithm is tested with experiments on the IEEE 39-bus model as well as the 2383-bus Polish model, demonstrating that this protection framework achieves optimal power system performance via automated decision-making.
Advisors/Committee Members: Sanchez%2C%20Eduardo%22%29&pagesize-30">
Cotilla-
Sanchez,
Eduardo (advisor),
Fern, Alan (committee member).
Subjects/Keywords: Power Systems Protection; Electric power distribution
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APA (6th Edition):
Meier, R. J. (2015). Toward Automated Decision-Making in Power Systems Wide-Area Protection. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/56382
Chicago Manual of Style (16th Edition):
Meier, Richard John. “Toward Automated Decision-Making in Power Systems Wide-Area Protection.” 2015. Masters Thesis, Oregon State University. Accessed April 22, 2021.
http://hdl.handle.net/1957/56382.
MLA Handbook (7th Edition):
Meier, Richard John. “Toward Automated Decision-Making in Power Systems Wide-Area Protection.” 2015. Web. 22 Apr 2021.
Vancouver:
Meier RJ. Toward Automated Decision-Making in Power Systems Wide-Area Protection. [Internet] [Masters thesis]. Oregon State University; 2015. [cited 2021 Apr 22].
Available from: http://hdl.handle.net/1957/56382.
Council of Science Editors:
Meier RJ. Toward Automated Decision-Making in Power Systems Wide-Area Protection. [Masters Thesis]. Oregon State University; 2015. Available from: http://hdl.handle.net/1957/56382
11.
Louie, Alex.
Finite Element Analysis Modeling and Experimental Verification of Reflected Wave Phenomena in Variable Speed Machine Drive Cables.
Degree: MS, Electrical and Computer Engineering, 2016, Oregon State University
URL: http://hdl.handle.net/1957/59199
► Modern variable speed machine drive (VSMD) systems are used for a variety of purposes including generation, propulsion, pumps and compressors. They employ high switching frequency…
(more)
▼ Modern variable speed machine drive (VSMD) systems are used for a variety of purposes including generation, propulsion, pumps and compressors. They employ high switching frequency power electronics to drive the electric machine. The machine is subject to large voltage overshoot if long power cables, are used, called Reflected Wave Phenomena (RWP), that can result in high electrical stress on the VSMD insulation system.
The adoption of higher switching speed wide bandgap (WBG) power semiconductor devices for increased VSMD system efficiencies will result in RWP, up to twice the DC bus voltage, occurring in shorter power cable lengths with likely occurrences of even larger over-voltage at previously acceptable cable lengths.
This work investigates the effects that VSMD inverter switching frequency, pulse rise time and cable length have on RWP. A 2D finite element analysis (FEA) cable model is proposed to account for the frequency dependent cable such as skin effect. The FEA model is then compiled into a circuit simulation component and simulated against varying VSMD system parameters. The accuracy of the modeling technique is experimentally verified by testing varying power cable lengths. Simulations and experimental testing show that PWM rise time, switching frequency and cable length all heavily impact the over-voltages seen at the output of the power cables. The simulation results were found to similarly match the experimental findings.
Advisors/Committee Members: Zhang, Julia (advisor), Sanchez%2C%20Eduardo%22%29&pagesize-30">
Cotilla-
Sanchez,
Eduardo (committee member).
Subjects/Keywords: RWP; Electric driving, Variable speed
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APA ·
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MLA ·
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APA (6th Edition):
Louie, A. (2016). Finite Element Analysis Modeling and Experimental Verification of Reflected Wave Phenomena in Variable Speed Machine Drive Cables. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/59199
Chicago Manual of Style (16th Edition):
Louie, Alex. “Finite Element Analysis Modeling and Experimental Verification of Reflected Wave Phenomena in Variable Speed Machine Drive Cables.” 2016. Masters Thesis, Oregon State University. Accessed April 22, 2021.
http://hdl.handle.net/1957/59199.
MLA Handbook (7th Edition):
Louie, Alex. “Finite Element Analysis Modeling and Experimental Verification of Reflected Wave Phenomena in Variable Speed Machine Drive Cables.” 2016. Web. 22 Apr 2021.
Vancouver:
Louie A. Finite Element Analysis Modeling and Experimental Verification of Reflected Wave Phenomena in Variable Speed Machine Drive Cables. [Internet] [Masters thesis]. Oregon State University; 2016. [cited 2021 Apr 22].
Available from: http://hdl.handle.net/1957/59199.
Council of Science Editors:
Louie A. Finite Element Analysis Modeling and Experimental Verification of Reflected Wave Phenomena in Variable Speed Machine Drive Cables. [Masters Thesis]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/59199
12.
Lajoie, Kelcey A.
An advanced study of wind power variability on the Federal Columbia River Power System.
Degree: MS, Electrical and Computer Engineering, 2014, Oregon State University
URL: http://hdl.handle.net/1957/49627
► Renewable energy, particularly wind power, has increased dramatically over the past two decades. In the Pacific Northwest, the power system has accommodated a large amount…
(more)
▼ Renewable energy, particularly wind power, has increased dramatically over the past two decades. In the Pacific Northwest, the power system has accommodated a large amount of new wind power. The variability of wind power has introduced many challenges, requiring additional reserve generation to be available to maintain system stability. The primary source for reserves is the Federal Columbia River Power System, and the aging dams of this system are believed to be near their limit for providing this service. This paper will explore the dynamics of the power system as a whole, and investigate the relationships that wind power has to the rest of the power system. Several types of studies have been used to examine these relationships including Maximal Information Coefficient analysis, Correlation analysis, and Regression analysis. The results of these analyses demonstrate that the dynamics of the power system changed as wind power was added to the system. The results will also show that the power system is increasingly reliant on resources other than hydropower, including thermal power and interties to California and Canada, to provide balancing reserves for wind power.
Advisors/Committee Members: Brekken, Ted K. A. (advisor), Sanchez%2C%20Eduardo%22%29&pagesize-30">
Cotilla-
Sanchez,
Eduardo (committee member).
Subjects/Keywords: Wind power – Columbia River Gorge (Or. and Wash.)
…x28;Y. Makarov).
Previous research at Oregon State University using correlation…
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APA (6th Edition):
Lajoie, K. A. (2014). An advanced study of wind power variability on the Federal Columbia River Power System. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/49627
Chicago Manual of Style (16th Edition):
Lajoie, Kelcey A. “An advanced study of wind power variability on the Federal Columbia River Power System.” 2014. Masters Thesis, Oregon State University. Accessed April 22, 2021.
http://hdl.handle.net/1957/49627.
MLA Handbook (7th Edition):
Lajoie, Kelcey A. “An advanced study of wind power variability on the Federal Columbia River Power System.” 2014. Web. 22 Apr 2021.
Vancouver:
Lajoie KA. An advanced study of wind power variability on the Federal Columbia River Power System. [Internet] [Masters thesis]. Oregon State University; 2014. [cited 2021 Apr 22].
Available from: http://hdl.handle.net/1957/49627.
Council of Science Editors:
Lajoie KA. An advanced study of wind power variability on the Federal Columbia River Power System. [Masters Thesis]. Oregon State University; 2014. Available from: http://hdl.handle.net/1957/49627
13.
Kulkarni, Janhavi.
Rapid Grid State Estimation using Singular Value Decomposition.
Degree: MS, Electrical and Computer Engineering, 2015, Oregon State University
URL: http://hdl.handle.net/1957/56317
► Synchrophasor technology has gained great momentum with the widely adopted concept of smart grids in power systems at transmission and generation level. This has led…
(more)
▼ Synchrophasor technology has gained great momentum with the widely adopted concept of smart grids in power systems at transmission and generation level. This has led to an improved
state estimation of a power system with the advent of Phasor Measurement Units (PMU). PMUs contribute in providing real-time information about the grid
state at a higher frequency than that has been historically available. This research aims to extend power system
state estimation to a distribution level using the
Oregon State University campus. Two
state estimation techniques utilizing Singular Value Decomposition have been investigated in this research to estimate the
state of the OSU power system with measurements from the sparsely deployed PMUs on the campus. The main objective is to build a
state estimation technique for a system with incomplete observability based on static set of data compiled by valid power flow solutions and limited number of PMU measurements. Within this research both methods of estimating the
state of the grid are demonstrated on three different sized power grids comprising of 3 buses, 14 buses and 286 buses, respectively. The two methods - Similarity Matching and Filtering - have been discussed as potential methods to determine the
state of a partially observable system at real-time or near real-time. Both the methods have been evaluated on the basis of computational speed and complexity as well as accuracy. The results obtained from both techniques of SVD are shown to have promising applications to rapid grid estimation at the distribution level of a system in which speed and sparseness are key.
Advisors/Committee Members: Brekken, Ted (advisor), Sanchez%2C%20Eduardo%22%29&pagesize-30">
Cotilla-
Sanchez,
Eduardo (committee member).
Subjects/Keywords: Smart power grids – Oregon – Corvallis
…17
2. System State Estimation of Oregon State University… …19
2.1 Phasor Measurement Units on the Oregon State University Campus… …Oregon State University
2.1 Phasor Measurement Units on the Oregon State University Campus… …State University (OSU) system to a smart grid and making the campus selfsustained… …islanded mode or as a micro grid. There has been significant progress towards
moving the Oregon…
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APA ·
Chicago ·
MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Kulkarni, J. (2015). Rapid Grid State Estimation using Singular Value Decomposition. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/56317
Chicago Manual of Style (16th Edition):
Kulkarni, Janhavi. “Rapid Grid State Estimation using Singular Value Decomposition.” 2015. Masters Thesis, Oregon State University. Accessed April 22, 2021.
http://hdl.handle.net/1957/56317.
MLA Handbook (7th Edition):
Kulkarni, Janhavi. “Rapid Grid State Estimation using Singular Value Decomposition.” 2015. Web. 22 Apr 2021.
Vancouver:
Kulkarni J. Rapid Grid State Estimation using Singular Value Decomposition. [Internet] [Masters thesis]. Oregon State University; 2015. [cited 2021 Apr 22].
Available from: http://hdl.handle.net/1957/56317.
Council of Science Editors:
Kulkarni J. Rapid Grid State Estimation using Singular Value Decomposition. [Masters Thesis]. Oregon State University; 2015. Available from: http://hdl.handle.net/1957/56317
14.
McCamish, Benjamin.
Bitmap Indexing : Energy Applications and Improvements.
Degree: MS, Computer Science, 2015, Oregon State University
URL: http://hdl.handle.net/1957/56351
► Large databases and data warehouses are becoming prevalent for the storage and management of energy data. Accelerating the rates at which data can be retrieved…
(more)
▼ Large databases and data warehouses are becoming prevalent for the storage and management of energy data. Accelerating the rates at which data can be retrieved is beneficial not only to allow for more efficient search of the data, but also to be integrated with other energy system tools. In this work, a fast indexing and data retrieval method, known commonly as a bitmap index, is created to facilitate intelligent querying and indexing of data generated by phasor measurement units (PMU) at a rate of 60 Hz. In addition, compression of these bitmap indexes is parallelized, and the performance quality of bitmaps created over this dynamic database are tested. We find that bitmaps are amenable to managing efficient access to large amounts of PMU data. Furthermore, the bitmap-management process will provide decreased access time for data retrieval as well as decreased memory usage. From these experiments, we are able to improve compression times while discovering new research opportunities, decrease access times to the PMU database by 30 times the conventional method currently utilizes, and introduce a feasible method for bitmap operations over a dynamic database.
Advisors/Committee Members: Sanchez%2C%20Eduardo%20J.%22%29&pagesize-30">
Cotilla-
Sanchez,
Eduardo J. (advisor),
Brekken, Ted (committee member).
Subjects/Keywords: Bitmap; Electric power systems – State estimation – Data processing
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APA ·
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APA (6th Edition):
McCamish, B. (2015). Bitmap Indexing : Energy Applications and Improvements. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/56351
Chicago Manual of Style (16th Edition):
McCamish, Benjamin. “Bitmap Indexing : Energy Applications and Improvements.” 2015. Masters Thesis, Oregon State University. Accessed April 22, 2021.
http://hdl.handle.net/1957/56351.
MLA Handbook (7th Edition):
McCamish, Benjamin. “Bitmap Indexing : Energy Applications and Improvements.” 2015. Web. 22 Apr 2021.
Vancouver:
McCamish B. Bitmap Indexing : Energy Applications and Improvements. [Internet] [Masters thesis]. Oregon State University; 2015. [cited 2021 Apr 22].
Available from: http://hdl.handle.net/1957/56351.
Council of Science Editors:
McCamish B. Bitmap Indexing : Energy Applications and Improvements. [Masters Thesis]. Oregon State University; 2015. Available from: http://hdl.handle.net/1957/56351
. 
Open Access Theses and Dissertations
