JEE_V6_N1_RP1 S.D.Sundarsingh Jebaseelan Dr.R.Raja Prabu Journal on Electrical Engineering 2230 – 7176 6 1 1 5 STATCOM, VSI, Reactive power, FACTS, MATLAB This paper deals with the performance of fourteen bus systems with and without STATCOM using five level inverter VSI circuit. The VSI is extremely fast in response to reactive power change. A Static Compensator (STATCOM) is a device that can provide reactive support to a bus. It consists of voltage source inverters connected to an energy storage device on one side and to the power system on the other. STATCOM is a device which can supply the required reactive power at low values of bus voltage and can also absorb active power if it has large energy storage. It also required having less harmonic contents in the output and higher compensation VA capacity. When the reactive power of the load is changing continuously, a suitable fast response compensator is needed. STATCOM, TCTC, UPFC, TCSC, SVC are the compensators belonging to FACTS devices. Models for the STATCOM is developed using MATLAB simulink. The simulation of the STATCOM is performed in the Simulink environment and the results are presented. July - September 2012 Copyright © 2012 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=1950