Compensation of harmonics in neutral current using active power filter for three phase four wire system

Year 2018, Volume: 31 Issue: 3, 846 - 861, 01.09.2018

Rajendrasinh Jadeja Akash Faldu Tapankumar Trıvedı , Siddharthsingh Chauhan Vinod Patel

Abstract

Increased penetration of non-linear loads like power electronic converter
based systems have aggravated issue of harmonic injection in the power system.
Neutral current harmonics is an issue of concern for three phase four wire
system. This paper is focused on the elimination of neutral current harmonics
with the help of shunt active power filter based on star-delta transformmer and
single phase half bridge inverter. The presented active power filter eliminates
harmonics present in neutral current which in turn helps in mitigating third
harmonics from the supply mains. The topology has advantage of reduced number
of semiconducting devices and switching losses as compared to conventional
three phase active filter. Simulation studies for the proposed active filter is
presented and compared with behavior of conventional three phase active filter.
Experimental results for DSP based laboratory prototype of the proposed filter
are shown to substantiate performance of system. Both simulation as well as
experimental results demonstrate effective compensation provided by single
phase half bridge inverter based active filter.

Keywords

Active Power Filter, Harmonics

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