Harmonic Reduction for Non-linear Loads using Simulink Based Filter Design

Abstract

Persistent use of non-linear loads both in three phase and single phase creates harmonic distortion. This is a key element in reducing power quality. Shunt active power filter (SAPF) is a prominent strategy to ameliorate power quality. In this paper two control scheme of SAPF is scrutinized. The control scheme is based on p-q theory and d-q-0 theory. Both schemes demonstrate satisfactory results in reducing Total Harmonic Distortion (THD). The THD is reckoned to be 1.97% for p-q theory controlled SAPF and 0.77% for d-q-0 theory controlled SAPF which is within the IEEE-519 standard. The distorted neutral current is quite retained by the proposed SAPF control scheme. This investigation demonstrates d-q-0 theory is the most prospective theory for SAPF control. The proposed strategy is executed by MATLAB-Simulink model.