A Comparative Study of Phase Offset Disposition Sinusoidal Pulse Width Modulation (POD-SPWM) and Symmetrical Pulse Width Modulation Switching Techiques for Generalized Current Source Multilevel Inverter(MCSI)

Nik Fasdi Nik Ismail (Faculty of Electrical Engineering, Universiti Teknologi MARA)
Nasrudin Abdul Rahim (Department of Electrical and Computer Engineering, College of Engineering and Renewable Energy Group, King Abdul Aziz University)
Siti Rohani Sheikh Raihan (UM Power Energy Dedicated Advanced Centre (UMPEDAC) , Universiti Malaya)
Yusuf Al-Turki (Department of Electrical and Computer Engineering, College of Engineering and Renewable Energy Group, King Abdul Aziz University)

Indonesian Journal of Electrical Engineering and Computer Science
Vol 9, No 2: February 2018

This paper presents a comparison between two switching techniques namely Phase Offset Disposition Sinusoidal PWM (POD-SPWM) and Symmetrical PWM switching for a generalized current source multilevel inverter (MCSI) topology. One of the advantages of MCSI is it can reduce the total harmonic distortion (THD) at the output load current with a sinusoidal current waveform. In this paper, the generalized MCSI with the different levels has been developed with Matlab@simulation software in order to study the performance of the two switching schemes for the operation of the MCSI. From the simulation results, POD-SPWM switching technique can give better THD results compare to symmetrical switching technique.