Simulation on harmonic elimination of electric vehicle charging station

WANG Xin-cheng， ZHANG You-bing， ZHENG Xu， YANG Guang-hao
（College of Information Engineering，Zhejiang University of Technology， Hangzhou 310023， China）

Abstract： Aiming at solving the problems of harmonic currents generated by electric vehicle（EV） charging station，the characteristic of working current of the electric vehicle was studied，simulating the EV as an equivalent resistor. Based on this，a small EV charging station was simulated in a community to study the characteristic of the station's harmonic current. The largest harmonic was gotten during the simulation as the equivalent resistor was taken the minimum value. Meanwhile，harmonic variability was analyzed when the EV comes to charging or leave，by the way of changing the resistor's value. After that，LC power filter and active power filter（APF）were introduced and designed to compare the filtering effects. The experimental results indicate that APF has the better effect than the LC filter，and good tracking performance as the resistor's value changes suddenly. The conclusion can be a guiding suggestion for the construction of the future charging station.
Key words： electric vehicle（EV）； charging station； harmonic current； LC power filter； active power filter（APF）； Simulink； simulation