Abstract
Advances in solid state power electronic devices and microprocessors has led to the development of various pulse-width-modulation (PWM) techniques for industrial applications. For example, PWM based 3-phase voltage source inverters (VSI) convert Solar cell DC power to AC power with variable voltage magnitude and variable frequency. To analyze the applications and advantages of three different PWM techniques over one another, inverter with different techniques have been modelled in the MATLAB/ Simulink environment. The Techniques compared in the paper are: the sinusoidal PWM (SPWM) technique, the third-harmonic-injection PWM (THIPWM) technique, and the bus-clamped PWM (BCPWM) technique. These three methods are compared by discussing their ease of implementation and by analyzing the output harmonic spectrum of various output voltages (poles voltages, line-to-neutral voltages, and line-to-line voltages) and their total harmonic distortion (THD).
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