Research on V2G Control of Smart Microgrid

Abstract

Based on the rapid development of V2G and smart microgrid, a control strategy of bidirectional AC/DC grid connected module is proposed based on the modeling and analysis of V2G charging topology. The voltage and current doubles closed loop is used as the control strategy to realize AC/DC circuit rectification or inverter. PI parameters of voltage outer loop and current inner loop are adjusted respectively. PI constant current control is adopted for bi-directional DC/DC circuit to achieve charging and discharging. The model is built in the Simulink simulation environment, and the correctness of the control strategy is verified by simulation. The results show that the V2G charging pile can charge and discharge the battery according to the preset control, and the voltage and current difference between the grid-side is 180° to complete the energy flow from the battery side of the grid-side to realize the V2G charging and discharging.