Impact of high penetration of PV generation on power system transient stability and fault current; modeling for real-time studies

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.

Grantor dc:publisher

University of Tennessee at Chattanooga

Year dc:date.available

2022

Author dc:creator

• Abdelgadir, Amira

Contributors dc:contributor

• Karrar, Abdelrahman A.
• Eltom, Ahmed H.; Kobet, Gary L.
• College of Engineering and Computer Science

• Electric power system stability
• Photovoltaic power systems
• Synchronous generators

Licence

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

Language dc:language

English, eng

Repository record dc:identifier

https://scholar.utc.edu/theses/673

OAI identifier oai:identifier

oai:scholar.utc.edu:theses-1840