混合型APF与HPF并联运行的方案探讨

在对几种不同拓扑结构的混合型有源滤波器进行对比分析的基础上,提出了一种改进方案,通过降低有源装置承担的基波电压和减小有源装置输出的基波电流有效降低了有源装置的容量。采用混合型有源滤波器与高通无源滤波器并联运行的方式,克服了原有装置补偿无功不足、有源部分容量大、成本高的缺点。方案运用了谐波分次检测、电容组投切、组合检测方式、谐波电流反馈校正等手段改善系统性能。通过理论分析,论证了该方案的有效性、可行性。

Discussion on Parallel Operation of Hybrid APF and HPF

On the basis of a comparative analysis of several different topological structures of the hybrid active filter,an improvement program is presented by reducing fundamental voltage and the output current of the active device to effectively reduce the capacity of the active device.The parallel operation of hybrid active filter and high passive filter overcomes the existing shortcomings of shortage of reactive compensation devices,large capacity of the active part and high costs.The program uses the means of a graded harmonic detection,switc- hing capacitor group,the combination of detection methods,and feed-back correction of harmonic current to improve system performance.Theoretical analysis proves the effectiveness and feasibility of the program.