中文摘要：

提出了一种分布式有源电力滤波（APF）系统，采用多个APF合理配置、共同治理电网谐波，并提出了等效导纳角差理论和加权平均法来确定单个和多个APF的安装点，达到最佳治理谐波的效果。仿真结果表明，单个APF最佳安装位置是馈线的末端，多个APF治理线路明显优于单个APF治理谐波，从而验证了分布式有源电力滤波系统的可行性和本理论的正确性。

英文摘要：

This paper proposed a new method of harmonic correcting： distributed active filter system （DAFS） based on multiple active filter units, which are installed properly and working together to correct the harmonic on the line. The theory of angle difference of equivalent admittance and the method of weighted mean were proposed to select the best point of connection for a single APF and multiple APFs respectively, so as to achieve the best results of harmonic suppression. The simulation results indicate that the best installation position is the end of the feeder for a single APF and the effect that multiple APFs restraining harmonic distortion of lines is better than a single APF, which has verified the feasibility of distributed active filter system（DAFS） and the correctness of the theory.