EV充電シナリオに応じた地域別充電負荷の推計

摘要

今後，商業施設や勤務先等での充電設備が整備され，移動目的地での充電が可能となってきた場合，日中の充電負荷が発生する.図1～3に示したように，平日の充電負荷は，勤務先での充電の有無により大きく異なる.勤務先での充電が行われるようになった場合，朝にピークが発生する可能性もある.%The objective of the present paper is to estimate daily load profiles of plug-in electric vehicle (EV) charging by region, which is defined by service areas of ten regional electric power companies in Japan. Using the road traffic census data on passenger vehicles, we calculate the charging load at 30% EV penetration. First, we estimate the load on weekdays under two charging scenarios, in which EVs are charged when parking period is more than 20 min. If we assume EV drivers charge in their offices after commuting, the load profile in the daytime has three peaks and in most regions the largest occurs in the morning. On weekends, because commuting trips are fewer than those on weekdays, the peak load in the morning is small. We also assume a charging scenario dedicated to weekends, in order for EVs to consume power generated from photovoltaic systems. We show EVs parking all day have great charging potential if their batteries can be set at low state of charge early in the morning.