Switching transient modeling and analysis of power-electronic-assisted on-load tap-changer based Sen transformer

被引：0
|
作者：
Guo X. [1 ]
Han S. [1 ]
Xie S. [1 ]
Bu L. [1 ]
Rong N. [1 ]
机构：
[1] Department of Electrical Engineering, Guizhou University, Guiyang
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2023年 / 43卷 / 06期
关键词：
overlap angle; power-electronic-assisted on-load tap-changer; Sen transformer; switching logic; switching transient modeling;
D O I：
10.16081/j.epae.202212024
中图分类号：
学科分类号：
摘要：
The switching transient model of the power-electronic-assisted on-load tap-changer（OLTC） based Sen transformer（ST） is presented，and the switching process is analyzed，including the fundamental switching logic，the influence of overlap angle and short circuit of the tap-changer，and the selection method of optimum switching angle（OSA） under different power factors. The switching transient model of power-electronic-assisted OLTC based ST is developed based on T-equivalent circuit and Laplace transformation. The fundamental switching logic is established according to the topology of a power-electronic-assisted OLTC. The influence of overlap angle and short circuit of the tap-changer on the switching process is analyzed. The selection method of OSA is illustrated by analyzing the switching process at different power factors. With the help of MATLAB and PSCAD／EMTDC，analytical calculations and time-domain simulations are carried out to verify the effectiveness of the proposed switching transient model，the switching logic and the selection method of OSA，and show that a complete switching process is possible in less than one cycle. In addition，the magnitude of the overlap angle and the peak of the short circuit current can be controlled by the switching angle. © 2023 Electric Power Automation Equipment Press. All rights reserved.
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页码：197 / 203
页数：6
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