一种新型串联型有源电力滤波器无谐波检测控制方法

Novel Control of Series Active Power Filter Without Harmonics Detection

提出了一种新型的用于串联型有源电力滤波器(SAPF)的控制方法,这种控制方法的思路是控制由SAPF产生的补偿电压跟踪电源电流的K倍来实现电流谐波的抑制.因为控制参考信号直接通过检测电源电流得到,无需谐波的任何信息,故提出的控制方法实际上消除了传统方法中必须的谐波检测的过程.和传统的控制方法相比,所提出的新型控制方法更简单,易于实现,降低了系统成本,避免了由复杂的谐波计算所带来的延时,能够获得更好的谐波补偿效果.仿真和实验结果都验证了所提出的新型控制方法的有效性.

A new control strategy for series active power filter （SAPF） is proposed, which attempts to control the compensation voltage injected by SAPF to trace the multiple of whole line current for achieving current harmonics suppression. Since the control reference signal is directly obtained by utilizing the detected line current without calculating harmonics, the proposed strategy actually eliminates the harmonics detection process which is indispensable for conventional control methods. Compared with the conventional control methods, the proposed control is therefore much simpler and easier to implement with lower cost, and the time delay caused by complicated harmonics calculation does not exist any more. The simulated and experimental results are presented to verify the proposed control method and the performance of SAPF.