DefinePK

Abstract

In this paper a hybrid filter which is a combination of series active filter and shunt passive filter is designed to mitigate the harmonics present the distribution system feeding unbalanced load. The control scheme is established on the PQ theory which is also knows as instantaneous theory. The control strategy is applied to eliminate the harmonics present in the load current of balanced and the unbalanced loads. The conventional PI controller has been implemented in the voltage and current loop of active power filter. In this topology, the passive filter compensation performance has been improved by series active filter. The proposed control strategy with the designed hybrid power filter is simulated in MATLAB simulink software and the results are presented.