电动汽车直流充电桩接入对电网谐波的影响分析

Study on the impact of electric vehicle DC chargers on power grid harmonics

介绍国家相关标准中对于电网谐波的要求和计算方法,对电网谐波的影响因素进行说明。结合某厂家生产的电动汽车直流充电桩谐波监测数据,对直流充电桩接入电网后产生的谐波进行了分析。针对不同的公共连接点最小短路容量和供电容量,研究了允许接入电网的最大直流充电桩数量,为电动汽车充电桩规模的合理配置提供了相应的理论依据。

To study the impact of electric vehicle DC chargers on the power grid harmonics,the influence factors of grid harmonics are discussed,according to the national standard.With the observed data of a specific DC charger,the harmonic current is analyzed when the DC chargers were integrated into the power grid.The maxi?mum number of DC chargers is studied,taking the different mini?mum short circuit capacity and power supply capacity of points of common coupling into account.This work provides theoretical basis for the configuration of electric vehicle DC chargers.