Fuzzy Logic Based Control of Multilevel Inverter for Railway Traction System

Abstract

This research especially focus on Railway Traction System of Electrical Multiple Units (EMUs) and illustrate the approaching of an Asymmetric Cascaded H-bridge (ACHB) 9-level MLI controlled by the Fuzzy Logic Controller (FLC) to enhance the quality of output by sinking the harmonic contents in the output result. As in the railway, traction system desires high power and voltage for its operation. So it is proficient to utilize recent introduced Multilevel Inverter (MLI) instead of Conventional Inverter. MLI which is discussed here uses two H-bridge modules with unequal DC sources and it is competent to generate multilevel results at output side. Here proposed MLI uses limited semiconductor switches and voltage source. Therefore expenditure and dimensions of the system is condensed. Thus the system effectiveness will enhance. Simulation has done by MATLAB software to authenticate the performance and functional study of proposed MLI. The simulated output shows very favourable result. Comparison has been made between the two (Conventional and Multilevel) power circuit configurations.