C型混合有源电力滤波器

该文提出一种新型混合有源电力滤波器结构，它将C型无源滤波器和电压源型有源滤波器结合起来，其中有源滤波器不承受基波电压，不负担基波电流且只通过部分谐波电流，输出变压器变比可以小于1，有源滤波器的直流侧电压与系统电压之比较低。在该文给出的复合控制方式下，该混合有源滤波器可以完全补偿指定的若干次负载谐波电流，同时对其他各次谐波电流有部分补偿作用。仿真和实验结果表明该方法中的有源滤波器具有装置容量小，输出电压波形控制简单，滤波效果好，容易实现的优点，适合于高电压大电流场合的谐波治理。

THE C TYPE HYBRID ACTIVE POWER FILTER

The paper presented a novel hybrid active power filter structure, which is the combination of a normal C type filter and active power filter(APF) of the voltage source type. In this circuittopology, the APF does not need to endure fundamental voltage and current, and only bear part of harmonic current. The ratio of the APF output transformer can be less than 1, so the D.C. voltage level of the APF is low with respect to the grid voltage. With the composite control strategy given in the paper, the hybrid APF can compensate some appointed load harmonic accurately and compensate other harmonic partially. The presented C type hybrid APF are characterized by small APF capacity, simple control, well filtering effect and easy realization. It is suitable for harmonic compensation in high voltage and large current condition. Theoretical analysis is verified by simulation and experiment results.