Switching Modulation Strategies for Multilevel Inverter

Authors

  • Jahanzeb - School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia
  • Shahrin Md. Ayob School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia.
  • Saifullah Khan School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia.
  • Mohd Zaki Daud School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia.
  • Razman Ayop School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia.

DOI:

https://doi.org/10.11113/elektrika.v20n2.253

Abstract

There is always a need to create efficient and optimized converters to deliver the best possible results to achieve a better THD profile in the waveform output. One way is by controlling the switching of the power switches of the converters using appropriate modulation schemes. While numerous works have been done in proposing new switching modulation strategies for multilevel inverters, this work will compare multicarrier PWM and near-to-level control (NLC) modulation schemes. In this paper, multicarrier PWM variants, namely, PD-PWM, POD-PWM, and APOD-PWM, are designed and simulated. Their voltage THD and spectrum performance are discussed when applied to single-phase 7, 9, and 11-level cascaded multilevel inverters. Then NLC modulation will be designed and applied to similar multilevel inverter circuits. It will be shown that the NLC exhibits some superior performances compared to PWM-based but with several drawbacks that can be optimized. 

Author Biography

Shahrin Md. Ayob, School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia.

Dr. Shahrin bin Md. Ayob, PhD, SMIEEE, MIET Associate Professor School of Electrical Engineering, Faculty of Engineering Universiti Teknologi Malaysia 81310 UTM Skudai, Johor

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Published

2021-08-28

How to Cite

-, J., Md. Ayob, S. ., Khan, S. ., Daud, M. Z. ., & Ayop, R. . (2021). Switching Modulation Strategies for Multilevel Inverter. ELEKTRIKA- Journal of Electrical Engineering, 20(2), 1–7. https://doi.org/10.11113/elektrika.v20n2.253

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Articles