Voltage-dip Induced Frequency Excursions in Solar PV Power Integrated Power System

Large scale deployment of various Renewable Energy Sources (RES) due to climatic issues and depletion of fossil fuels has led to significant RES generation share in power systems especially from Solar Photovoltaic (PV). Among the various challenges of higher solar PV integration, voltage and frequency stability issues are of major concern to the system operator. Voltage dip induced frequency excursions due to delayed active power recovery from the solar PV systems following a network fault is one such critical issue that has not been investigated enough and reported in the literature. This paper examines potential impact of such delayed active power recovery from utility scale solar PV systems, and its effect on the system frequency stability under increasing PV penetration levels. The studies have been carried out on modified New England Benchmark system and Gujarat state power system in India for various system scenarios and cases.