摘要
电动汽车的快速发展势在必行,其接入电网会产生大量谐波,且多位于配网末端,给配网电能质量提出严峻挑战,因此有必要对电动汽车充电设施进行建模仿真,评估其谐波影响水平。本文利用Matlab/Simulink设计了充电机接入电网模型与无源滤波器模型,建立了三相桥式不控整流充电机及无源滤波器的仿真模型,使用快速傅里叶变换进行了滤波前后谐波电流仿真分析。采用无源滤波器后电网侧各次谐波电流显著减少,电流总谐波畸变率和各次谐波电流含有率都有降低。
The rapidly developing electric vehicle industry located at the end of the distribution network will produce a large number of harmonics and put forward severe challenges for power quality of the distribution network, so it is necessary for the electric car charging infrastructure to model and simulate and evaluate the harmonic level of influence. Design the charger connected to the electricity grid model and the model of the filter using Matlab/Simulink. Establish the simulation model of the rectifier charger controlled by the three-phase bridge and the passive filter, using fast Fourier transform to analyse the harmonic current without and with filtering. Every harmonic current is significantly reduced after adopting passive filter, reducing the current total harmonic distortion rate and the containing rate of each harmonic current.
出处
《电气技术》
2017年第2期74-77,82,共5页
Electrical Engineering
