Power Quality Enhancement using Adaptive Notch Filter in Grid Distribution System

Abstract

In this work three different techniques for harmonic current compensation and extraction utilizing a VSC (voltage source converter) in a 3-phase, three-wire distribution system are described. The stationary load current components were calculated by Synchronous Reference Frame Theory (SRFT), which has its foundation on the transformations of load currents proposed by Clarke and Park. A Notch Filter is a band reject (band stop) filter that allows the majority of frequencies to pass through unaltered while attenuating select frequencies to very low values in a particular range. The basic portion of the contaminated load current is fetched using a notch filter, and VSC provides the appropriate correction. The filter that is self-tuned and also separates the active part of load current is called an adaptive notch filter. These suggested methods are straightforward and can quickly identify and reduce harmonic current using shunt compensation. We have used MATLAB Simulink to evaluate, analyze, compare and simulate the techniques.