Impact of STATCOM on voltage profile in a DG penetrated grid connected system

Abstract

Because of soaring fuel prices, lack of generation and increasing population and demand of electrical power, micro grid's formation has become unavoidable. The Micro-grid (MG) concept begins with a combination of loads and micro sources which is operating as a single controllable system which provides power and heat to the local load. These concepts provide a new paradigm for deriving the operation of Distributed generation (DG). A fluctuation in load bus voltage is mainly due to the variation in load. To mitigate the voltage variations at the load buses a STATCOM is employed. In case of non-linear loads, STATCOM not only improves the voltage profile of the load bus but also reduces the total harmonic distortion in the line current. To maintain the load bus voltage at a reference value the STATCOM compensates reactive power. In this paper, the system is dynamically modeled and results are shown. The simulation works are done in MATLAB/SIMULINK.