并联有源电力滤波器控制策略研究

Research on Control Strategy of Shunt Active Power Filter

针对并联有源电力滤波器(SAPF)的谐波检测策略,采用了更符合实际的基于检测特定次谐波的谐波检测算法,并在闭环控制中,电流内环采用无差拍控制,在满足电流误差要求的同时提高了控制精度。利用PSIM进行了仿真,并与电流内环为比例积分(PI)控制进行对比。仿真结果表明电流内环无差拍控制算法比PI控制具有更高的电流控制精度。

Aiming at the harmonic detection strategy of shunt active power filters,a more practical harmonic detection algorithm based on detecting specific harmonics is adopted.In double closed-loop control,the current inner loop adopts deadbeat control.The control accuracy is improved while meeting the current error requirements.The simulation was performed using PSIM and compared with the current inner loop for PI control.Simulation results show that the control strategy can improve the control accuracy of the output current,which verifies the effectiveness of the method.