System and control design of a hybrid active power filter in three-phase four-wire system

In this paper, the system implementation of a hybrid active power filter (HAPF) in three-phase four-wire power system is proposed and discussed. The HAPF is characterized by lower the dc-link rating of the conventional active power filter (APF) without significantly deteriorates the system compensation features and performances. An 110 V / 1.65 KVA HAPF experimental prototype is built in a laboratory, and its experimental results are given in order to prove the correctness and effectiveness of the proposed HAPF.