Experimental study on impedance characteristics of 10 kV magnetic biased superconducting current limiter

被引：0

作者：

Wei D. ^{[1
]}

Wang F. ^{[1
]}

Zhu J. ^{[2
]}

Liu Y. ^{[1
]}

Liu C. ^{[2
]}

Liu J. ^{[1
]}

机构：

[1] Electric Power Research Institute of State Grid Liaoning Electric Power Supply Co.，Ltd., Shenyang

[2] China Electric Power Research Institute, Beijing

来源：

Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2022年 / 42卷 / 11期

关键词：

current limiting rate; impedance characteristics; magnetic biased; mathematical model; superconducting current limiter;

D O I：

10.16081/j.epae.202205031

中图分类号：

学科分类号：

摘要：

The mathematical model of current limiting process for 10 kV grid is established in combination with the system operating conditions. The current limiting mechanism in different stages is analyzed and the changing trend of impedance characteristics of magnetic biased superconducting current limiter is obtained. The impedance characteristics operation test circuit of 10 kV magnetic biased superconducting current limiter is constructed, based on which, the current waveforms under different current limiting conditions are measured, and the equivalent equation and the variation curve of impedance characteristics of magnetic biased superconducting current limiter are obtained. The study results show that, in stable operation stage, the equivalent impedance of the current limiter is 0.13 Ω, the limiting rate of the current peak under the setting Condition 1 and 2 are 13.1 % and 8.98 % respectively in initial current limiting stage；in steady current limiting stage, the equivalent impedance of the current limiter is 1.667 Ω, and the limiting rate of the current peak under the setting Condition 1 and 2 are 16.23% and 14.13% respectively. The mathematical equation of the impedance characteristics of the current limiter in initial current limiting stage is given. © 2022 Electric Power Automation Equipment Press. All rights reserved.

引用

页码：114 / 119

页数：5

共 20 条

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