Certain investigations and realization of optimum thd in fpga based cascaded multi level inverter a soft computing approach

Abstract

High quality power is vital for medical research and industrial applications newlineto bring good quality results and for accurate evaluation Power electronic circuits newlineare used in various industrial commercial and residential applications An newlineimportant problem associated with power electronic circuits is harmonic generation newlineThis will affect the performance of other equipment connected to the same system newlineMultilevel inverters continue to receive more and more attention because of their newlinehigh voltage operation capability low switching losses high efficiency and low newlineoutput of Electro Magnetic Interference EMI The harmonics injected by the newlinepower electronic converters can be minimized by two ways One is through newlinemodifying circuit configuration and other is by using Pulse Width Modulation newlinePWM techniques Various soft computing techniques are used to evaluate the newlineperformance of multilevel inverter The present work is carried out in a single phase newlinecascaded nine level inverter with identical DC voltage sources and this work is newlinefocused on reduction of harmonic components using sinusoidal PWM technique newline newline