基于充电桩谐波电流的动模实验系统研究

Research on Power Distribution System Dynamic Experiment System Based on Harmonic Current in Charging Pile

充电桩(CP)谐波电流会使电气设备产生额外的功耗,影响电网的稳定运行。基于10 kV配网动模实验系统,搭建了CP并联运行工作平台,研究了不同CP数量的谐波电流成分,并与仿真波形进行了对比分析。研究结果表明:随着CP数目的增加,谐波电流的含量会相应减少,主要成分为低频奇次谐波。16台CP并联时,3次谐波为主要成分,仿真计算曲线与实际测量曲线波形基本一致,各频次谐波电流幅度基本一致,证明动模实验平台测试CP谐波电流是合理可行的。该动态模型可为后续的CP谐波抑制研究提供技术支撑。

Harmonic current of charging pile(CP)causes additional power consumption of electrical equipment and affect the stable operation of power grid.Based on the dynamic model experiment system of 10 kV distribution network,a working platform for parallel operation of CP is built,which studies the harmonic current components and analyzes the simulation waveform.The results prove that with the increase of CP,the content of harmonic current will decrease correspondingly,the main components are low frequency odd harmonics.When 16 CPs are connected in parallel,three harmonics are the main components,the waveform of the simulation calculation curve and the actual measurement curve are basically consistent,and the current amplitude of each frequency harmonic wave is basically the same,so it is proved that the dynamic model experiment platform is reasonable and feasible to test the harmonic current of CP.This dynamic model can provide technical support for subsequent research on harmonic suppression.