Distortion free improved reference current generation algorithm for interleaved inverter based shunt APF

Abstract

This paper presents three-phase interleaved inverter topology to enhance the operation of shunt active power filter (SAPF) for mitigating current harmonics, reactive power, shoot-through problem, etc. Conventional voltage source inverter (VSI) has failure mode of operation which causes to damage the power switches. This proposed interleaved inverter avoid conduction through same leg switches. Therefore, no shoot-through mode in the circuit operation of the interleaved SAPF. The proposed interleaved SAPF uses a modified indirect current control technique for generating distorted free reference current. Therefore, switching notches and ripples have been eliminated in the source current which improves the source current %THD. The performance of proposed interleaved SAPF and control algorithm has been designed and tested in MATLAB/ Simulink environment. The proposed interleaved SAPF with proposed control algorithm is effectively mitigating current harmonics, reactive power for unity power factor operation and removes the notches in the source current without shoot-through problems. The complete simulation results have been presented.