并联电容器接入方式与位置对APF的影响分析

Analysis on the Influence of Shunt Capacitor Connected Mode and Position on APF

配电系统中谐波电流的抑制和无功功率的补偿是改善电能质量和节能降耗的两种技术手段。在实际应用中,存在采用有源电力滤波器抑制谐波、同时采用并联电容器补偿无功的情况。当两者并联接入系统公共连接点的位置不当时,两者之间将会相互影响,甚至导致有源滤波器无法正常运行。本文针对这一现象进行了分析,对电容器与有源滤波器接入方式进行了仿真,为实际中电容器的正确接入提供参考。

Reactive power compensation and harmonic mitigation are important measures to improve power quality.In industrial applications,the active power filter（APF） and shunt capacitor are possibly connected to a distribution system together in order to suppress harmonics and reactive power.Some interactions between APF and capacitor will exist and may cause the APF operate abnormally,when their locations connected to the system is unsuitable.This phenomenon is analyzed and simulated under different connecting schemes of capacitor in this paper,and the results will provide reference for suitable connection of capacitor and APF to a system with harmonic loads.