充电桩网侧谐波补偿分析

针对由电动汽车充电桩中非线性装置产生谐波电流等引起的电能质量问题,阐述了APFC校正下由于传统的平均电流控制策略会使网侧电流含有低次谐波分量,导致输入电流仍存在较大失真,使系统的功率因数难以进一步提高。在此基础上,分析了充电桩中谐波产生的机理,提出了在指令电流中加入三次谐波补偿进一步对谐波抑制,并从原理上分析了其可行性与有效性。最后通过MATLAB/Simulink仿真并搭建硬件平台,仿真和实验结果表明:采用该策略进一步提高了电能质量与网侧的功率因数,具有较好实用性。

Analysis of Harmonic Injection in Charge Side of Charging

In order to solve the problem of power quality caused a harmonic current generated by a non-linear device contained in an electric vehicle chargers, it is described that the traditional current control strategy under the APFC, it will make the network side current contain low harmonic components, resulting in a large distortion of the input current, making it difficult to further improve the power factor of the system. On this basis, the mechanism of the harmonic generation in the charging station is analyzed, it is proposed to add third harmonic compensation to reduce harmonic, and to analyze the feasibility and effectiveness of the principle. Finally, MATLAB/Simulink was used to simulate the system. The results show that this method can improve the power quality and power factor of the network side, and have good practicability.