Power Quality Improvement in Utility Grid using Single Phase Micro Sources, DSTATCOM and Distributed Generators

Abstract

This paper proposes to improve the power quality in a
utility connected grid by using converter based single
phase micro sources. T he voltage unbalance can be
severe if single-phase rooftop mounted PVs are
distributed randomly between the households.
Moreover, there can also be single-phase nonlinear
loads present in the system. The cumulative effect of
all these will cause power quality problem at the
utility side. To counteract this problem, we have
proposed t wo different schemes. In this first
scheme a distribution static compensator (DSTATCOM
) is connected at the utility bus to
improve the power quality. The DSTATCOM only
supplies reactive power and no real power. In the
second scheme, a larger three-phase converter
controlled DG is placed that not only supplies the
reactive power but also provides active power. The
efficacies of the  controllers have been validated
through simulation for  various operating
conditions using MATLAB/SIMULINK.