COMPARISON OF TWO-LEVEL AND THREE-LEVEL NEUTRAL-POINT CLAMPED CONVERTER OF METRO TRAIN SYSTEM

Abstract

A reliable public transportation i.e. a world class Mass Rapid Transit System is an integral part of infrastructure development of India. While evaluating different mass transit system, metro system is given preference as road based bus system cannot cater to passenger capacity as much as metro system. Metro system is operated in under-ground, elevated above street level therefore it is most suitable public transportation system in the cities. Metro train system also reduces road accidents and air pollution. Due to higher level of comfort, speed and efficiency, rail based system is found most favorable, in terms of saving time as compared to a road based system. To maintain operation & punctuality of a metro system, its converter inverter system should be reliable and efficient. This report highlights the comparison of the two level converter and three level neutral point clamped converter for the application in Delhi Metro Trains. Literature survey regarding two level converters and three level Neutral point clamped converters has been done. Simulation has been done in MATLAB to compare the two level and three level converters. Comparison of the total harmonic distortion of the two level and three level neutral point clamped converters have been done through MATLAB Simulation.