Harmonic elimination in cascade multicell inverter using Novel SWPWM, SPWM and ISPWM: a comparison
نویسندگان
چکیده
Multilevel inverters have become more popular over the years in electric high power application with the promise of less disturbances and the possibility to function at lower switching frequencies than ordinary two-level inverters. Multilevel inverters has been introduced as static high-power inverters for medium to high voltage applications such as large electric drives, reactive power compensations, dynamic voltage restorers and FACTS devices. Different Pulse Width Modulation (PWM) strategies have been used in multilevel inverter topologies. In this paper novel method Square Wave Pulse Width Modulation (SWPWM), Inverted Sinusoidal Pulse width modulation (ISPWM) and Sinusoidal Pulse Width modulation (SPWM) in order to minimize the Total Harmonic Distortion (THD) are used for a nine-level Cascade H-Bridge Multicell Inverter (CHMCI). The MATLAB/Simulink software program is used to verify the effectiveness of each above strategies.
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