一种基于指令修正的有源电力滤波器控制方法

A Control Method of Active Power Filter Based on Revised Command

对于有源电力滤波器,稳态谐波补偿精度是衡量其性能的重要指标。提出一种基于指令修正的有源电力滤波器控制方法。在电流环仅采取50 Hz比例谐振调节器的基础上,根据有源电力滤波器电流指令和实际电流的偏差,对电流指令进行慢速校正。利用线性控制系统的特点修正实际输出电流,从而提高各次谐波稳态补偿精度。最后,通过功率实验对该控制方法进行有效性验证。

Steady-state harmonic compensation accuracy is a key indicator to measure the performance of an active power filter.This paper presents a control method of active power filter based on the revised command.Based on only one proportional-resonant controller of 50 Hz was adopted for current loop,slow revision of the current command was performed according to the deviation between the current command and actual current of active power filter.Steady-state compensation accuracy of subharmonics was improved by modifying the actual output current in line with the characteristics of the linear control system.Finally,the effectiveness of the method was verified by a power experiment.