Research on Voltage Control Method of Distributed Photovoltaic Distribution Network Considering Electric Vehicle Charging

Abstract

A large number of distributed photovoltaic grid connected to the grid is the main reason for voltage overrun of low-voltage distribution network. Therefore, this paper proposes a voltage control method using electric vehicle (EV) and photovoltaic inverter. Firstly, the distributed control of photovoltaic inverter is adopted. The voltage is regulated by controlling the active power output and reactive power output of the photovoltaic inverter, and the utilization rate of each photovoltaic inverter is the same. If the voltage is not within the safety threshold or the spare capacity of the PV inverter is insufficient, the charging and discharging power control of the electric vehicle will be carried out, and the charging and discharging rate will be controlled according to the consistency target of the electric vehicle power utilization and the SOC local information. The low-voltage distribution system is built in Matlab/Simulink. The simulation results show that the proposed control method is feasible and effective, and the voltage overrun problem in this area is effectively solved.

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