This study simulates supply-demand operation based on Electric Vehicle (EV) bus travel data and examined the impact of the amount of V2G controlled EV buses introduced on supply-demand operation. The evaluation of the effect of reducing supply-demand adjustment costs from a renewable energy ratio of 50-60% to the current amount of EV buses introduced, and from the case where all of the 70,000 EV buses in the Kanto region were converted to EVs to the case where no EVs were converted to EVs. In all cases, the introduction of EV buses was confirmed to reduce the demand-supply adjustment cost. In addition, the cost reduction effect seemed to converge to a certain value.
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