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
Journal of Central South University ›› 2019, Vol. 26 ›› Issue (10) : 2822 -2832.
Improved hyper-spherical search algorithm for voltage total harmonic distortion minimization in 27-level inverter
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.
27-level inverter / cascade multi-level inverter / improved hyper-spherical search (IHSS) algorithm / total harmonic distortion (THD) minimization
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