A novel control scheme for Series Hybrid Active Power Filter for mitigating source voltage unbalance and current harmonics

Abstract

In the area of active power filtering, the Series Hybrid Active Power Filter (SHAPF) has been taken into account increasingly. Existing control strategies for SHAPF are based on extracting either source current harmonics or load voltage harmonics and are valid for balanced source and load conditions. In this paper a novel control scheme based on generalised instantaneous power theory for SHAPF is proposed. This control scheme is valid for balanced and unbalanced source conditions and is capable of balancing load voltage while mitigating supply current harmonics. The mathematical formulation of proposed control scheme with its applications to SHAPF is presented. The validity of the proposed control scheme is verified by the simulation study.