SOC Synchronization Control Method of Electric Vehicles Considering Customers' Convenience for Suppression of System Frequency Fluctuation

Abstract

Nowadays, a large integration of photovoltaic and wind power generations causes an imbalance between supply and demand in power systems because their outputs are intermittent. To solve the mentioned problem, Vehicle-to-Grid (V2G), which is one of the smart grid technologies, has gained much attention. Under the concept of V2G, batteries of Electric Vehicles (EVs) can be used as Battery Storage Energy Systems (BESS) in the power system. In this paper, we are developing a new Load Frequency Control (LFC) method using EVs, which is named the State Of Charge (SOC) synchronization control. In the proposal control method, a number of EVs in the power system can be considered as one large-capacity BESS. Moreover, the EVs can be plugged-in/out whenever the users want to and can store the sufficient energy for the next trip at plug-out.