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Defense of a Ph.D. Dissertation- Lakshmi Sundaresh

Candidate for Doctor of Philosophy
Defense of a Ph.D. Dissertation

Faculty Advisor: Dr. Yilu Liu

Title: 
Development of Large-Scale Models and HVDC Control Strategies to Improve Resiliency of North American Power System

Abstract:
     With drastic transformation of the electrical power system, the challenges related to planning, operation, and maintenance of power systems are increasing. The controls and operating procedures of the power systems have to be reevaluated because certain inherent characteristics of the power system like inertia, response time and control behavior are changing drastically. With improved wide area measurements and analysis techniques detecting wide area phenomena, analyzing them and eventually developing mitigation procedure that not only ensure resiliency but in some cases even improve have become necessary. 

Resiliency of a power system is an amalgamation of broad concepts like robustness, resourcefulness, rapid recovery, adaptability. The exact implication of these concepts on power system planning and operation is subject to the characteristics of the system and also the phenomena under study. Therefore, based on these distinctive characteristics, it is important to identify the appropriate tools and techniques to assess them. In this work, a phenomenon called momentary cessation has been analyzed and techniques to estimate this momentary PV generation drop are analyzed using the FNET measurements are discussed. Large-scale detailed dynamic model of the entire North American power system has been developed. HVDC based transient stability and frequency response support controls are also proposed and analyzed.

Friday, November 1, 2019 at 11:00am

Min H. Kao Electrical Engineering and Computer Science, 235
1520 Middle Drive, Knoxville, TN 37996

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