Improving performance of shunt active power filter with hysteresis-based direct current control using particle swarm optimisation

Abstract

Shunt active power fi lter (SAPF) is a well-established and widely accepted power electronic device for cancelling harmonic currents from electrical networks. The common configuration of SAPF utilises a proportional-plus-integral (PI) controller. However, the conventional approaches for determining the PI coeffi cients may not provide satisfactory results for a wide range of operating points (loads). This paper proposes to use the particle swarm optimisation (PSO) algorithm to determine the optimal coeffi cients of PI controller for SAPF applications. The DC control approach is used to generate the reference harmonic signals from the non-sinusoidal load current while a hysteresis-based PI controller is selected to control the compensating currents. Simulation results for a power network connected to a non-linear load are generated to investigate the dynamic performances of SAPF with the conventional-PI and enhanced PSO-PI controllers.