Impact of high PV penetration on U.S. eastern interconnection frequency response

This study quantitatively studied the impact of PV power plants on frequency response at both the system level and the regional level in the U.S. Eastern Interconnection system. The decrease of frequency primary response capability was quantified with multiple PV penetration levels. The frequency response capability change was found to be non-linear with the change of PV penetration. Different voltage/var control modes of PV plants were also found to have obvious impact on system frequency response.