电动汽车充电机谐波抑制工作机理的研究

电动汽车充电机作为非线性负荷,在充电过程中会产生大量不规则谐波,影响电网电能质量。根据其产生的谐波特点,研究利用有源电力滤波器(APF)抑制相应谐波的工作机理,采用空间矢量与滞环相结合的控制策略,建立了充电机谐波抑制系统的Matlab仿真模型,分别对单台充电机和多台充电机运行时的谐波抑制进行了仿真研究。仿真结果表明,充电机系统在单台或多台、稳态或暂态情况下,APF都能有效抑制谐波。

Study on Harmonics Suppression Mechanism of Electric Vehicle Charging

Electric vehicle(EV) chargers as the nonlinear load generate a large number of harmonics which do great harm to power system during charging.According to the harmonics characteristics of the EV during charging,this paper reseaches the mechanism of the EV charging harmonics suppression by using active power filter(APF),and the harmonic compensation algorithm is the control strategy of space vector combined with hysteresis band.This paper designs Matlab simulation model of chargers with APF,and studies the harmonics suppression using Matlab/Simulink software when the single charger and multiple chargers are running,respectively.Finally,the simulation results show that APF can effectively suppress harmonics whatever the charging system is single or multiple chargers,and working in steady or transient conditions.