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.
摘要
多电平逆变器(MLIs)在工业电源控制系统和分布式电源等不同领域中得到了广泛的应用。MLIs 有多种形式,级联多线阵(CMLIs)具有不同的输出电压等级,使用相同数量的元件和更高的电能质量 等特殊优点。本文研究了一种考虑总谐波失真最小化的27 级电平逆变器开关算法。逆变器开关的开 关角通过最小化基于THD 的目标函数来实现。为了使基于THD 的目标函数最小化,对一种新的优化 算法—超球面搜索算法进行了改进,并将改进后的超球面搜索算法与其他五种进化算法的结果进行了 比较,说明了超球面搜索算法的优越性。
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Arani, A.A.K., Karami, H., Vahidi, B. et al. Improved hyper-spherical search algorithm for voltage total harmonic distortion minimization in 27-level inverter. J. Cent. South Univ. 26, 2822–2832 (2019). https://doi.org/10.1007/s11771-019-4216-2
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DOI: https://doi.org/10.1007/s11771-019-4216-2
Key words
- 27-level inverter
- cascade multi-level inverter
- improved hyper-spherical search (IHSS) algorithm
- total harmonic distortion (THD) minimization