事業所における大容量太陽光発電の有効活用に対する電気自動車の退社前放電の有用性

抄録

As installed capacity of Photovoltaic (PV) power generation increases, energy storage resources should be increased more in order to reduce PV power curtailment and to reduce CO₂ emission. The increasing penetration of Electric Vehicles (EVs) may provide opportunities to reduce the PV curtailment by using EV for charging the surplus PV power output daytime and discharging it nighttime. Especially, commuting EVs of factories are suitable for PV charging at the factories, but one of the challenging points is that the available time as energy storage resource is limited compared to a stationary BESS. In order to increase the EV charging during daytime, we focused on the EV discharging to the factories in the evening. This study evaluates the usefulness of commuting EVs as energy storage resource based on their potential to reduce operating cost and CO₂ emission by simulating a year-round operation of factory-scale power system featuring high PV power capacity.