Research and design of three-phase unbalanced commutation switch based on seamless commutation technology

被引：0
|
作者：
Zhao Y. [1 ]
Che R. [1 ]
Zhang M. [1 ]
Chen J. [1 ]
机构：
[1] Key Laboratory of Power System Intelligent Dispatch and Control, Ministry of Education, Shandong University, Jinan
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2022年 / 42卷 / 09期
关键词：
inverter circuit; power factor correction; three-phase current unbalance; three-phase unbalanced commutation switch;
D O I：
10.16081/j.epae.202205017
中图分类号：
学科分类号：
摘要：
The application of three-phase unbalanced commutation switch can alleviate three-phase current unbalance in low-voltage distribution network. However, the phase sequence switching principle of split commutation switch at present is too simple, and there are some problems such as long power-off time, and serious voltage and current distortion in commutation process, which limit its wide application. An overall commutation scheme based on the power factor correction circuit and the inverter circuit is proposed, which is composed of four stages, including initial stage, current phase tracking stage, switching phase tracking stage and commutation completion stage. Firstly, the voltages of the two phases to be switched to each other are adjusted to the same amplitude, the same frequency and the same phase through the power factor correction circuit and the inverter circuit. Then the commutation action is completed by the power electronic switches, and finally the seamless switching between phases is realized. The simulative and experimental results show that the proposed scheme ensures the uninterrupted power supply in the commutation process, and improves the distortion of voltage and current. © 2022 Electric Power Automation Equipment Press. All rights reserved.
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页码：176 / 182
页数：6
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