基于不同整流装置的电动汽车充电机比较

电动汽车充电站的主要设备之一是充电机,充电机是由整流器、直直变换器等装置组成的电力电子设备,接在城市电网和电动汽车之间会对城市电网产生谐波污染.为了消除和抑制谐波污染.有必要分析各种充电机的谐波大小和变化趋势.本文使用电力系统软件PSCAD,建立了不控整流充电机、十二脉波整流充电机和PWM整流充电机的模型,从接入系统产...

Comparison among Chargers of Electric Vehicle Based on Different Rectifiers

Charger is one of the main facilities in Electric Vehicle （EV） charging station. As power electronic equipments which are composed of rectifying devices and DC-DC converters, EV chargers will pollute the power grids when connected between grid and EVs. It is necessary to analyze the harmonic size and trends in order to eliminate and suppress harmonic pollution. PSCAD software is used in modeling of uncontrolled rectifier charger, 12-pulse rectifier charger and PWM rectifier charger in this paper and they are compared according to harmonic currents caused by EV chargers. Modeling of multiple chargers going line simultaneously or not is provided. The corresponding harmonics are measured and analyzed and disciplines of harmonics are summarized as well. The conclusion provides a reference in the selection of chargers for charging station. The proposed method can be applied to analyze power network harmonics produced by large-scale centralized charging stations adopting traditional charging mode.