Advanced control strategy of a transformerless three phase shunt hybrid power filter

Abstract EN

This paper describes an advanced control algorithm applied to a three phase shunt hybrid active power filter (SHAPF) for power-quality improvement and reactive power compensation required by a nonlinear load.

The proposed control uses a robust PLL based on Multi-Variable Filters (MFV) to determine the reference current for the SHAPF.

The SHAPF is formed by a single 7th tuned LC filter per phase and a small-rated three-phase active filter, which are directly connected in series without any matching transformer.

The required rating of the active filter is much smaller than that of a conventional standalone active filter be.

All simulations are performed by using Matlab-Simulink Power System Blockset and validated with an experimental test bench developed in the LIAS laboratory, University of Poitiers.

Various simulation and experimental results of the proposed control algorithm are presented under steady state and transient conditions to confirm his validity and effectiveness.