A case study of photovoltaic power generation and its future ramp possibility for Tokyo electric power area

A case study of rapid variation (ramp event) of photovoltaic (PV) power generation on 18 April 2016 for the Tokyo Electric Power Company (called “TEPCO”) power area is considered in this study. PV system installation in the TEPCO area has been increasing (approximately 10 GW PV system capacity). Quasi real-time monitoring of PV power generation by using satellite-estimated solar radiation is performed. Under assumptions of future PV system installation scenarios (from 21.78 GW to 85.76 GW in the TEPCO area), temporal and spatial variations of PV power generation are estimated.