基于有源功率因数校正的直流充电桩控制策略研究

Research on Control Strategy of DC Charging Pile Based on Active Power Factor Correction

针对常规电动汽车充电桩存在的引发电网产生大量谐波污染、功率因数低、输出不稳定等问题,在直流充电桩中引入有源功率因数校正(APFC)技术,以实现优质电能的输出。采用空间矢量脉宽调制(SVPWM)算法的双闭环直接电流控制,对APFC主电路参数及其PI控制器参数进行设计,并分别利用MATLAB/Simulink和搭建试验平台进行仿真和试验验证,仿真和试验结果表明,提出的控制方法可有效减小谐波污染,提高功率因数和电能质量。

In view of the problems existing in the conventional electric vehicle charging pile,such as a large amount of harmonic pollution,low power factor,unstable output,APFC(Active Power Factor Correction)technology is introduced into DC charging pile to realize the output of high quality electric energy.In this research,the double closed loop direct current control based on SVPWM algorithm is adopted to design the main circuit parameters of APFC and its PI controller parameters.The simulation and test verification are conducted in MATLAB/Simulink,and then the platform is built to verify the effectiveness of the control method.Simulation and test results show that the proposed control method can effectively reduce harmonic pollution,improve power factor and quality of electricity power.