An Integration Optimization Strategy of Line Voltage Cascaded Quasi-Z-Source Inverter Parameters Based on GRA-FA

Zhiyong Li, Shiping Pu, Yougen Chen and Renyong Wei
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Zhiyong Li: School of Automation, Central South University, 932 South Lushan Road, Changsha 410083, China
Shiping Pu: School of Automation, Central South University, 932 South Lushan Road, Changsha 410083, China
Yougen Chen: School of Automation, Central South University, 932 South Lushan Road, Changsha 410083, China
Renyong Wei: School of Automation, Central South University, 932 South Lushan Road, Changsha 410083, China

Energies, 2020, vol. 13, issue 17, 1-24

Abstract: Setting reasonable circuit parameters is an important way to improve the quality of inverters, including waveform quality and power loss. In this paper, a circuit system of line voltage cascaded quasi-Z-source inverter (LVC-qZSI) is built. On this basis, the double frequency voltage ripple ratio and power loss ratio are selected as optimization targets to establish a multi-objective optimization model of LVC-qZSI parameters. To simplify the calculation, an integration optimization strategy of LVC-qZSI parameters based on GRA-FA is proposed. Where, the grey relation analysis (GRA) is used to simplify the multi-objective optimization model. In GRA, the main influence factors are selected as optimization variables by considering the preference coefficient. Then, firefly algorithm (FA) is used to obtain the optimal solution of the multi-objective optimization model. In FA, the weights of objective functions are assigned based on the principle of information entropy. The analysis results are verified by simulation. Research results indicate that the optimization strategy can effectively reduce the double frequency voltage ripple ratio and power loss ratio. Therefore, the strategy proposed in this paper has a superior ability to optimize the parameters of LVC-qZSI, which is of great significance to the initial values setting.

Keywords: LVC-qZSI; GRA-FA; parameter optimization; double frequency ripple; power loss (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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