Performance and analysis of three phase SAPF under different control algorithms for power quality problems

Abstract

High reactive power burden, load unbalances, and current harmonics in a distribution line result from the widespread usage of non-linear nature of power electronic components. FACTS devices are introduced to maintain a sinusoidal supply to the end customers; among them, all Shunt active power filter (SAPF) can dynamically adjust current-based power quality concerns by providing harmonic components of load currents in shunt mode at point of common coupling (PCC). This paper explores the SAPF performance for a three-phase system using instantaneous active and reactive power theory (IRPT or p-q theory), synchronous reference frame theory (SRF or d-q theory) for correction of reactive power, Harmonic removal using direct current control method. To further enhance its performance in terms of dc link capacitor profile over robust Sliding Mode Control, a new controller named synergetic controller is proposed for this SAPF. For the validation purpose, simulation results have been captured on the MATLAB Simulink environment using Simpower system toolbox. The results proven that the SAPF with synergetic controller able to reduced current ripples on dc link capacitor and also improves the dynamic response of voltage by offering better THD.