DC Interruption Performance of Vacuum Interrupters in a Quench Protection Switch Based on Forced Current Zero

被引：1

作者：

Shi, Zongqian ^{[1
]}

Li, Sheng ^{[1
]}

Zhao, Zeliang ^{[1
]}

Zhao, Linyan ^{[1
]}

Lv, Xinkun ^{[1
]}

Jia, Shenli ^{[1
]}

Wang, Lijun ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Xian, Peoples R China

来源：

29TH INTERNATIONAL SYMPOSIUM ON DISCHARGES AND ELECTRICAL INSULATION IN VACUUM (ISDEIV 2020) | 2021年

关键词：

quench protection switch; vacuum interrupter; DC interruption; interruption performance; vacuum arc; SYSTEM;

D O I：

10.1109/ISDEIV46977.2021.9587179

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In a superconducting Tokamak, superconducting coils play crucial roles in generating desired magnetic field profile and confining high-temperature plasma. When quench occurs inside superconducting magnet, tremendous energy stored in the coil has to be dissipated in time before any damage to the magnet caused by heat or electric stress. In this paper, a quench protection switch (QPS) based on forced current zero is investigated experimentally. The first current commutation process from the bypass switch (BPS) to the main circuit breaker (MCB) is presented. The second current commutation process from the MCB to the discharging resistor is mainly studied. In this stage, experimental current in the MCB, which uses vacuum interrupter (VI), is forced to zero by a high-frequency countercurrent, which is a typical approach of DC interruption. The interruption performance and influence of contacts structure, countercurrent frequency and contacts stroke are discussed. The evolution of vacuum arc in this process is investigated as well.

引用

页码：121 / 126

页数：6

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