Comparison of Voltage Sag and Swell Mitigation Using DVR and D-STATCOM

Abstract

A wide range of electrical, power electronic and electronic equipments are included in modern power systems. Thus
the concern of power engineers over the quality of electrical power has increased recently. The transmission of power from the
generating station to the load centers is affected by variations in loads, weather, demands etc. Various power quality issues that
could arise during such transmission of power include voltage sags, swells, interruptions, flickers etc. Almost all of these power
quality issues will have severe impact on consumer devices which may eventually lead to malfunctions and loss of production. In
this paper we present two different methods of mitigating voltage sag and swell using two different custom paper devices – DVR
and D-STATCOM. Also a comparison of these two mitigation methods is made in this paper.