Studies and Simulation based Implementation of Various PWM Strategies for Voltage Source Converter

This paper presents studies and implementation of various pulse width modulation (PWM) strategies which refers to a method of carrying information on train of pulses and the information be encoded in the width of pulses. Pulse Width Modulation is used to control the inverter output voltage. This is done by exercising the control within the inverter itself by adjusting the ON and OFF periods of inverter. PWM is commonly used in applications like motor speed control, converters, audio amplifiers, etc. For example, it is used to reduce the total power delivered to a load without losses, which normally occurs when a power source is limited by a resistive element. There is no single PWM method that is the best suited for all applications and with advances in solid-state power electronic devices and microprocessors, various pulsewidth modulation (PWM) techniques have been developed for industrial applications. For these reasons, the PWM techniques have been the subject of intensive research since 1970s. The paper consists studying various PWM strategies divided into basic and advanced modulation strategies. Same strategies are implemented on voltage source converter in MATLAB.