Browsing by Subject "Power system"
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Item Design and analysis of wind energy systems in power applications(2012-08) Pappu, Santosh; Bayne, Stephen B.; Giesselmann, Michael G.I am grateful to Dr.Stephen Bayne for taking me as a graduate student early in my Masters. He has been a guide in every sense. His thoughts and insights to Electrical Engineering have only broadened my horizon in Electrical Engineering. His ideas and guidance have been instrumental in publishing three IEEE conference papers during my time here. His belief in my abilities and constant encouragement has made me work harder to achieve my goals. I would like to thank Dr.Michael Giesselmann for accepting to be the co-chair on my committee for my thesis defense. I thank Mr. Jerry Lopez for being a great mentor. He has been an inspiration throughout my Masters. His work ethics and commitment has been a great influence on me. He has set a high benchmark which has left me chasing constantly. Interacting with him has only made me a better person. I thank my friends Chaitanya S.K, Purvi Patni and Sanjar Hussain for encouraging me throughout my Masters. I thank Mr. Sandeep Nimmagadda for helping me with my research and internship. I thank Srividya for being my pillar of strength throughout my Masters. Without her it wouldn’t have been possible to survive the day to day hardships of life in USA. Lastly I would like to thank my parents and Almighty from the bottom of my heart for giving me the opportunity to study in the United States. Without their blessings none of this would have been possible.Item Optimal monitoring and visualization of steady state power system operation(2009-06-02) Xu, BeiPower system operation requires accurate monitoring of electrical quantities and a reliable database of the power system. As the power system operation becomes more competitive, the secure operation becomes highly important and the role of state estimation becomes more critical. Recently, due to the development of new technology in high power electronics, new control and monitoring devices are becoming more popular in power systems. It is therefore necessary to investigate their models and integrate them into the existing state estimation applications. This dissertation is dedicated to exploiting the newly appeared controlling and monitoring devices, such as Flexible AC Transmission System (FACTS) devices and (Phasor Measurement Units) PMUs, and developing new algorithms to include them into power system analysis applications. Another goal is to develop a 3D visualization tool to help power system operators gain an in-depth image of the system operation state and to identify limit violations in a quick and intuitive manner. An algorithm of state estimation of a power system with embedded FACTS devices is developed first. This estimator can be used to estimate the system state quantities and Unified Power Flow Controller (UPFC) controller parameters. Furthermore, it can also to be used to determine the required controller setting to maintain a desired power flow through a given line. In the second part of this dissertation, two methods to determine the optimal locations of PMUs are derived. One is numerical and the other one is topological. The numerical method is more effective when there are very few existing measurements while the topology-based method is more applicable for a system, which has lots of measurements forming several observable islands. To guard against unexpected failures of PMUs, the numerical method is extended to account for single PMU loss. In the last part of this dissertation, a 3D graphic user interface for power system analysis is developed. It supports two basic application functions, power flow analysis and state estimation. Different visualization techniques are used to represent different kinds of system information.