Compensation of Voltage Sag, Swell and Electrical Noise Using Distributed Generation Dynamic Voltage Restorer

Abstract

Major challenge in power system operation is to analyze if the system at any instant operates
safely and reliably with voltage within nominal values. In this paper, a novel Distributed
Generation fed Dynamic Voltage Restorer (DG-DVR) is proposed to compensate for voltage
distortions and electrical noises. MPPT algorithms are compared and the best tracking point
is implemented to track the maximum power point of the PV array. Voltage distortions (sag
and swell) and electrical noise are detected using DWT wavelet. DG-DVR not only mitigates
sag/swell/noise but also supplies energy when utility grid is disconnected from the load
terminals. The simulation and experimental results are presented to validate the performance
of the proposed system.