电容中点式三相四线制APF中直流侧电容的选择

DC Capacitors Selection used in the Split-capacitor of Three-phase Four-wire APF

三相四线制APF中,采用电容中点式拓扑,直流侧电容上要流过很大的电流,对直流侧支撑电容的耐流能力要求很高。本文以一台30kVA的三相四线制电容中点式APF为例,通过对比分析,证明了在电容中点式APF中,选择薄膜电容比电解电容要更适合。

In the split-capacitor of three-phase four-wire APF,current flows through the DC Jink capacitor,so demand the DCJink capacitor high current capacity.In this paper,a 30KVA three-phase four-wire capacitor APF,for example,by comparing the analysis to prove that film capacitors to be more suitable than electrolytic capacitors