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中南大学学报(英文版)

Journal of Central South University

Vol. 26    No. 10    October 2019

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Improved hyper-spherical search algorithm for voltage total harmonic distortion minimization in 27-level inverter
A A KHODADOOST ARANI, H KARAMI, B VAHIDI, G B GHAREHPETIAN

Electrical Engineering Department, Amirkabir University of Technology, Tehran, Iran

Abstract:Multi-level inverters (MLIs) have become popular in different applications such as industrial power control systems and distributed generations. There are different forms of MLIs. The cascaded MLIs (CMLIs) have some special advantages among them such as more different output voltage levels using the same number of components and higher power quality. In this paper, a 27-level inverter switching algorithm considering total harmonic distortion (THD) minimization is investigated. Switching angles of the inverter switches are achieved by minimizing a THD-based objective function. In order to minimize the THD-based objective function, the hyper-spherical search (HSS) algorithm, as a novel optimization algorithm, is improved and the results of improved HSS (IHSS) are compared with HSS algorithm and other five evolutionary algorithms to show the advantages of IHSS algorithm.

 

Key words: 27-level inverter; cascade multi-level inverter; improved hyper-spherical search (IHSS) algorithm; total harmonic distortion (THD) minimization

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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