Dissertation Announcement for Thaer Qunais — 03/06/2019 at 10:30 AM
February 25, 2019
Dear Faculty, Graduate and Undergraduate Students,
You are cordially invited to my PhD. dissertation defense.
Dissertation Title: Impacts analysis of Cross-Coupling Droop Terms on Power Systems with Converter-Based Distributed Energy Resources
When: Wednesday, March 6, 2019, 10:30 am
Where: Simrall 228
Candidate: Thaer Qunais
Degree: PhD, Electrical and Computer Engineering
Committee:
Dr. Masoud Karimi-Ghartemani
Associate Professor of Electrical and Computer Engineering
(Major Professor)
Dr. Yong Fu
Associate Professor of Electrical and Computer Engineering
(Committee Member)
Dr. Joni Kluss
Assistant Professor of Electrical and Computer Engineering
(Committee Member)
Dr. Seungdeog Choi
Associate professor of Electrical and Computer Engineering
(Committee Member)
Abstract
Microgrid (MG) concept has been emerged to enable integration of renewable energy sources and storage devices using power electronic converters. An MG can be grid connected to exchange power with the main grid, isolated that is completely separated from the grid, or islanded that is temporarily separated from the grid. The P-f and Q-V drooping approach is commonly used to control and achieve power sharing among the generators.
This dissertation presents an approach for systematically modeling a class of microgrid (MG) systems. The derived model 1) accommodates grid-connected and islanded operation of the MG simultaneously, and 2) allows modeling of converter-based as well as directly-interfaced resources. The originally nonlinear model is then converted to a linear model whose eigenvalues determine local stability of the MG.
The model is used to analyze the impacts of adding cross-coupling droop terms (P-V and Q-f) on an MG’s performance. Various performance aspects such as stability, stability robustness, transmission power loss, voltage profile, and power sharing are considered. A study for further optimizing the trade-offs that are obtained is also presented. General guidelines to set different levels of cross-coupling terms in the study system are introduced.
Best Regards,
Thaer Qunais