Committee Chair

Karrar, Abdelrahman A.

Committee Member

Eltom, Ahmed H.; Kobet, Gary L.

Department

Dept. of Electrical Engineering

College

College of Engineering and Computer Science

Publisher

University of Tennessee at Chattanooga

Place of Publication

Chattanooga (Tenn.)

Abstract

The electric power system is currently experiencing a period of unprecedented changes in the technology of generation. Environmental and sustainability concerns led to replacement of a significant share of conventional thermal generation with renewable energy resources. This shift has raised major challenges of replacing synchronous machines and their well-known dynamics with power-electronics interfaced generation whose behavior and response when integrated to the bulk power system is yet to be fully understood. Over the years, many researchers investigated the effects of high injection of inverter-based resources on the system transient stability and fault levels. However, these studies were not in real time environment and deployed the inverter based resources IBRs in a distribution system or small-scale generation levels. This work studies the impact of high level PV injection on both the synchronous generators transient stability and grid’s fault current, and associated modeling as appropriate for real-time analysis. A test system provided by IEEE called D29 is modeled in Matlab/Simulink and RT-Lab Real Time Digital Simulator. From the analysis it is found that PV generators negatively affect synchronous machines’ transient stability if they replace conventional generation. In terms of fault current, PV generators contribution to the fault current is relatively low compared to synchronous generators and does not generally exceed two times the inverter rated current. The main contribution of this work will be modeling a system of PV generators that can work on real-time digital simulators environment.

Degree

M. S.; A thesis submitted to the faculty of the University of Tennessee at Chattanooga in partial fulfillment of the requirements of the degree of Master of Science.

Date

8-2020

Subject

Electric power system stability; Photovoltaic power systems; Synchronous generators

Keyword

critical clearing time; IBR; synchronous generators; transient stability

Document Type

Masters theses

DCMI Type

Text

Extent

ix, 65 leaves

Language

English

Rights

http://rightsstatements.org/vocab/InC/1.0/

License

http://creativecommons.org/licenses/by/4.0/

Date Available

9-1-2022

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