Design and experiments of a bidirectional thyristor bridge switch for LC commutation in high-current DC vacuum circuit breaker
In the Quench Protection System (QPS) of superconducting fusion device, high-current DC breaker is an important component. LC commutation circuit provides a negative pulse current to generate zero-crossing point in Vacuum Circuit Breaker (VCB) for DC interruption. In this paper, a bidirectional thyr...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | International Journal of Electrical Power & Energy Systems |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142061525002364 |
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| author | Meng Xu Wei Tong Hua Li Zhiquan Song Zhenhan Li Chao Gao Peng Fu |
| author_facet | Meng Xu Wei Tong Hua Li Zhiquan Song Zhenhan Li Chao Gao Peng Fu |
| author_sort | Meng Xu |
| collection | DOAJ |
| description | In the Quench Protection System (QPS) of superconducting fusion device, high-current DC breaker is an important component. LC commutation circuit provides a negative pulse current to generate zero-crossing point in Vacuum Circuit Breaker (VCB) for DC interruption. In this paper, a bidirectional thyristor bridge switch for LC commutation circuit is proposed, and the test and performance research are carried out. Firstly, the electrical issues of high-voltage stress, large-current temperature rise and voltage balancing protection are analyzed, and a 15 kV/55 kA thyristor bridge switch prototype is developed. In the testing of the prototype, the inconsistency phenomenon of series connected thyristors in trigger conducting stage was discovered. After eliminating external factors, it was found that the inconsistency was caused by the parameter dispersion of thyristors themselves. Through the selection of UGT/IGT parameter, the thyristors after replaced show higher consistency. Moreover, this phenomenon has been explained in detail based on the physical structure of thyristor. Finally, high-current experiments including pulse discharge test of LC commutation circuit and 55 kA VCB breaking test are successfully implemented. The performance of thyristor bridge switch was further verified. |
| format | Article |
| id | doaj-art-6a7fc41ac2b64e30940588622bac9839 |
| institution | Kabale University |
| issn | 0142-0615 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Electrical Power & Energy Systems |
| spelling | doaj-art-6a7fc41ac2b64e30940588622bac98392025-08-20T03:49:41ZengElsevierInternational Journal of Electrical Power & Energy Systems0142-06152025-07-0116811068510.1016/j.ijepes.2025.110685Design and experiments of a bidirectional thyristor bridge switch for LC commutation in high-current DC vacuum circuit breakerMeng Xu0Wei Tong1Hua Li2Zhiquan Song3Zhenhan Li4Chao Gao5Peng Fu6Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, Hefei 230026, ChinaSchool of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; Corresponding author.Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, ChinaSchool of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, ChinaZhuzhou CRRC Times Semiconductor Co., Ltd, Zhuzhou 412001, ChinaInstitute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, ChinaIn the Quench Protection System (QPS) of superconducting fusion device, high-current DC breaker is an important component. LC commutation circuit provides a negative pulse current to generate zero-crossing point in Vacuum Circuit Breaker (VCB) for DC interruption. In this paper, a bidirectional thyristor bridge switch for LC commutation circuit is proposed, and the test and performance research are carried out. Firstly, the electrical issues of high-voltage stress, large-current temperature rise and voltage balancing protection are analyzed, and a 15 kV/55 kA thyristor bridge switch prototype is developed. In the testing of the prototype, the inconsistency phenomenon of series connected thyristors in trigger conducting stage was discovered. After eliminating external factors, it was found that the inconsistency was caused by the parameter dispersion of thyristors themselves. Through the selection of UGT/IGT parameter, the thyristors after replaced show higher consistency. Moreover, this phenomenon has been explained in detail based on the physical structure of thyristor. Finally, high-current experiments including pulse discharge test of LC commutation circuit and 55 kA VCB breaking test are successfully implemented. The performance of thyristor bridge switch was further verified.http://www.sciencedirect.com/science/article/pii/S0142061525002364DC breakerThyristorSeries connectedUGT/IGTConducting consistency |
| spellingShingle | Meng Xu Wei Tong Hua Li Zhiquan Song Zhenhan Li Chao Gao Peng Fu Design and experiments of a bidirectional thyristor bridge switch for LC commutation in high-current DC vacuum circuit breaker International Journal of Electrical Power & Energy Systems DC breaker Thyristor Series connected UGT/IGT Conducting consistency |
| title | Design and experiments of a bidirectional thyristor bridge switch for LC commutation in high-current DC vacuum circuit breaker |
| title_full | Design and experiments of a bidirectional thyristor bridge switch for LC commutation in high-current DC vacuum circuit breaker |
| title_fullStr | Design and experiments of a bidirectional thyristor bridge switch for LC commutation in high-current DC vacuum circuit breaker |
| title_full_unstemmed | Design and experiments of a bidirectional thyristor bridge switch for LC commutation in high-current DC vacuum circuit breaker |
| title_short | Design and experiments of a bidirectional thyristor bridge switch for LC commutation in high-current DC vacuum circuit breaker |
| title_sort | design and experiments of a bidirectional thyristor bridge switch for lc commutation in high current dc vacuum circuit breaker |
| topic | DC breaker Thyristor Series connected UGT/IGT Conducting consistency |
| url | http://www.sciencedirect.com/science/article/pii/S0142061525002364 |
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