PERFORMANCE ANALYSIS OF CASCADE MULTILEVEL INVERTER USING STATIC SYNCHRONOUS COMPENSATOR (STATCOM)

Abstract

This Dissertation is dedicated to Performance analysis of cascade multilevel inverter using static synchronous
compensator (STATCOM). The main object is maintaining the voltage stability and improves the power quality in the power
system. Therefore a new control strategy is proposed in order to reduce the voltage fluctuation and also to minimize current
and voltage harmonics in the transmission system. So in flexible AC Transmission systems (FACTS) controller, the
STATCOM have shown easiest in terms of cost effectiveness in a wide range of problem solving abilities from transmission
to distribution levels. A cascade multilevel inverter is power electronics device which convert DC voltage into desired AC
voltage. A standard cascade multilevel inverter requires “n” DC source for 2n+1 level. To operate a high voltage
application a large number of DC capacitors are utilized in a cascade multilevel inverter using STATCOM. To achieve a low
distortion output voltage or a nearly sinusoidal output waveform, a triggering signal should be generated to control the
switching frequency of each power semiconductor switch. The simulation results of MATLAB/SIMULINK model indicate the
performance of the proposed control system as well as the precision of the proposed system.