System stability effect of large scale of EV and renewable energy deployment

This paper mainly focuses on the impact of large EV and renewable energy (solar energy and wind energy) deployment on power system. This research is based on several tests on the extended WSCC 9 bus system. In the first step of this research, California power flow prediction by 2020, including load flow data, EV data, PV generation data and wind generation data are made by literature reviewing. In the next step, the WSCC 9 bus system and constructed using software PSS/E. Then the PV, EV and wind turbine models are developed and connected to the WSCC 9 bus system. Then the power flow calculation, contingency analysis are conducted to validate the system steady state stability. To test the system dynamic stability, several test cases are developed according to the California power flow prediction data and the dynamic behavior of the system is studied by simulating a 5-cycle bus fault. The responses obtained from the simulation indicate that the system can keep working in steady state when coupled with the EVs and renewable energy according to the WECC planning standard and control theory.