A Comparative Study of Total Harmonic Distortion betweenTwo Topologies 27- and 31 Multi Level Inverter

Husien, Muna Hassan; Alrawe, Mohammed Ali A.

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A Comparative Study of Total Harmonic Distortion betweenTwo Topologies 27- and 31 Multi Level Inverter

Al-Rafidain Engineering Journal (AREJ)

Article 16, Volume 28, Issue 1, Winter 2023, Page 173-180 PDF (1428 K)

Document Type: Review Paper

DOI: 10.33899/rengj.2022.134999.1192

Authors

Muna Hassan Husien

¹; Mohammed Ali A. Alrawe²

¹Electrical Engineering Department, Collage of Engineering, University of Mosul, Mosul, Iraq

²Electrical Engineering Department, Collage of Engineering, University of Mosul , Mosul, Iraq

Abstract

In recent times, Multilevel inverters are considered an essential component of power electronics with widespread use in a wide range of high-voltage and high-power industrial and commercial applications. The use of multi-level inverters, also known as MLIs, has been preferred over conventional inverters due to the characteristics that these MLIs possess. These characteristics include low harmonic distortion caused by satisfacory performance of MLIs. This paper is concerned with analyzing harmonics to gain a deeper understanding of the performance of cascaded H-Bridge multilevel inverters (CHB-MLI). The model was constructed by using MATLAB/SIMULINK. A comparison was made between an asymmetrical cascaded 27 and 31-level multi-level inverter (MLI) by using the Phase disposition sinusoidal Pulse Width Modulation (PD-SPWM)and Phase Opposition Disposition sinusoidal Pulse Width Modulation (POD-SPWM) techniques. According to the outcomes of the simulations, 31 levels are better than 27 where Total Harmonic Distortion ( THD) in 31 levels is lower than 27 levels. The best result obtained during this study is 31 levels that use (PD-SPWM) technology, where the percentage of total harmonic distortion is small compared to the rest of the results and equal to 3.63%.

Keywords

Multilevel inverter; phase disposition sinusoidal Pulse Width Modulation (PD-SPWM); Total Harmonic Distortion; Phase Opposition Disposition sinusoidal Pulse Width Modulation (POD-SPWM) Asymmetrical multi-level inverter (AML)

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