基于误差电流最优的三相四开关有源电力滤波器空间矢量控制方法

摘要

To improve the harmonic compensation ability of fault-tolerant three-phase four-switch APF,a improved SVPWM strategy is proposed.With the traditional SVPWM control method aiming to control the amount of current error rate,this method is different,the method regards the amount of current error as the control target,firstly calculate the real-time basic voltage vector,and then combined with the instruction current and the error of current to calculate best output reference voltage and reduce the amount of current error to zero,Compared with the traditional SVPWM control method,this method can effectively reduce the error between the output current and the instruction current of three phase four switch active power filter,and improve the harmonic compensation performance,at the same time easy to DSP digital realization,finally the simulation results verify the effectiveness of the algorithm in this paper.%为提高容错三相四开关有源电力滤波器谐波补偿性能,提出一种改进型三相四开关有源电力滤波器的SVPWM控制方法.与传统SVPWM控制方法以电流误差量变化率为控制目标不同,该方法以误差电流最优为控制目标,首先计算出实时基本电压矢量,然后结合指令电流和误差电流计算出最佳输出参考电压,使控制目标电流误差量减小至零.相比传统SVP-WM控制方法,该方法能有效降低三相四开关有源滤波器输出电流与指令电流的误差量,提高谐波补偿性能;同时易于DSP数字化实现,最后仿真结果验证了本文算法的有效性.