Particle swarm optimization effectiveness for selective harmonic elimination in multilevel inverters at varying output levels

Majlesi Journal of Electrical Engineering

مقاله 15، دوره 19، شماره 2، شهریور 2025، صفحه 1-15   

نوع مقاله: Reseach Article

شناسه دیجیتال (DOI): 10.57647/j.mjee.2025.1902.38

نویسندگان

Muhammad Najwan Hamidi^{* 1}؛ Dahaman Ishak²

¹School of Electrical & Electronic Engineering, University Sains Malaysia, Nibong Tebal, Malaysia.

²Electrical Engineering Department, Prince Mohammad Bin Fahd University, Al Khobar, Saudi Arabia.

چکیده

Multilevel inverters (MLI) play a pivotal role in diverse applications, notably solar power generation, owing to their capacity for generating high-quality, multiple-level output voltages with reduced total harmonic distortions (THD) in comparison to traditional inverters. Nevertheless, as MLI levels increase, challenges arise, impacting implementation feasibility due to heightened computational demands for pulse width modulation (PWM) generation. Researchers have inclined towards low-frequency, pre-calculated switching signal methods, although these tend to induce higher output harmonics, particularly at lower levels. This study focuses on studying the significance of employing the particle swarm optimization (PSO) technique to solve selective harmonic elimination (SHE) equations (SHE-PSO) in MLI applications, evaluating its impact on THD at various output levels (3L, 5L, and 7L) within a cascaded H-bridge MLI. Results are compared with simpler methods, namely sine-based calculation (SBC) and Newton Raphson-based SHE (SHE-NR). The
findings illustrate that SHE-PSO effectively minimizes lower-order harmonics to as low as 0%, outperforming SBC and NR. However, in terms of THD, SHE-PSO proves advantageous only at 5L, with SHE-NR exhibiting superior performance at other levels. This study concludes that the reduction of lower-order harmonics in MLI does not necessarily translate to an overall improvement in THD, particularly at higher levels. 

کلیدواژه‌ها

Multilevel inverter؛ Particle swarm optimization؛ Low-order harmonics؛ Total harmonic distortion؛ Selective harmonic elimination

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