混合有源滤波器的复合控制研究

Complex control of hybrid active power filter

分析了注入式混合有源滤波器的工作原理,它可以降低有源部分的基波分压,减少有源部分容量,更适用于高压系统,还可以有效地克服了开关器件容量和成本等因素的影响。提出了一种通过检测电网电流和负载谐波电流的复合控制方案。通过控制上述两个量来防止系统阻抗间可能的串并联谐振,而达到抑制电网谐波的目的。

The working principle of the injection HAPF was analyzed, which could reduce the based voltage of active part and the capacity of active part, and effectively overcome switch device capacity and cost factor, more suitable for high pressure system. A composite control scheme through testing the power current and load current was presented. By controlling the above two values, the impedance series and parallel resonance of the system could be prevented, and thereby achieve the purpose of suppressing the harmonic.