An Evolutionary Annealing–Simplex Method for Inductance Value Selection for LCL Filters

Xingyu Yang (), Huanyi Zhou, Mohammad Alathamneh and R. M. Nelms
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Xingyu Yang: Electrical and Computer Engineering Department, Auburn University, Auburn, AL 36849, USA
Huanyi Zhou: Biomedical Engineering Department, Johns Hopkins University, Baltimore, MD 21218, USA
Mohammad Alathamneh: Electrical and Computer Engineering Department, Auburn University, Auburn, AL 36849, USA
R. M. Nelms: Electrical and Computer Engineering Department, Auburn University, Auburn, AL 36849, USA

Energies, 2023, vol. 16, issue 10, 1-16

Abstract: Grid-connected voltage-source inverters (VSIs) have evolved over the past years for the interconnection of renewable energy sources with the grid to satisfy the increased electrical load demand and utilize clean carbon-free energy. However, VSIs suffer a significant drawback of switching harmonics caused by the inverter switches. To reduce the amount of current distortion injected into the utility grid and meet harmonic constraints as defined by power quality standards, an LCL filter is often used. Although extensive literature describes assorted design procedures for an LCL filter, all these methods cannot guarantee an optimal solution, because no direct mathematical function between the LCL filter parameters and the total harmonic distortion (THD) exists. Presented in this paper is the application of an evolutionary annealing–simplex method to select the inductance values in the LCL filter. This method is compared to other methods previously presented in the literature: a systematic method and an inductance grid-search method based on a calculated distribution of total harmonic distortion for various inductance values. The goal is to select the smallest overall inductance values to ensure lower manufacturing costs while maintaining the filter performance. Simulation and experimental results verify that at least a 40% reduction in overall inductance can be achieved with the proposed method while simultaneously guaranteeing the filtering performance.

Keywords: grid-connected voltage-source inverter system; THD; LCL filter; harmonics; inductor; evolutionary simplex algorithm; cost (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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