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Due to the absence of the natural current zero-crossing point in the dc system, how to realize the dc rapid interruption has been a critical issue. A DC transfer switch of passive self-excited oscillation based on vacuum and nitrogen-hydrogen mixed gas series linkage is proposed in this paper, and the ability of the high arc voltage switch to quickly interrupt current is analyzed. When the arc voltage is increased to 300 V, the breaking time of small current 2 kA is reduced by 61.69%. In order to increase the gas arc voltage, the disc-type multi-contact bridge gas contact structure is designed, and a vacuum and nitrogen-hydrogen gas mixture series linkage switch structure with double ultra linkage is built. On the basis of the test arc voltage, the transfer circuit parameters are matched. The results show that, the current breaking ability can be achieved at 2 kA within 3ms and at 5kA within 15ms, which provides feasibility reference for the application of the high arc voltage switching of the vacuum and nitrogen-hydrogen mixed gas series linkage in the DC rapid interrupting.

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Design and Research of Self-Excited Oscillatory DC Transfer Switch Based on Series Linkage of Vacuum and Nitrogen-Hydrogen Gas Mixture

  • 会议论文

  • 发表日期：

    2026年

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  • Xuewei Xu,
  • Guowei Ge,
  • Xian Cheng,
  • Cong Qin,
  • Shuhao Jia

摘要

Due to the absence of the natural current zero-crossing point in the dc system, how to realize the dc rapid interruption has been a critical issue. A DC transfer switch of passive self-excited oscillation based on vacuum and nitrogen-hydrogen mixed gas series linkage is proposed in this paper, and the ability of the high arc voltage switch to quickly interrupt current is analyzed. When the arc voltage is increased to 300 V, the breaking time of small current 2 kA is reduced by 61.69%. In order to increase the gas arc voltage, the disc-type multi-contact bridge gas contact structure is designed, and a vacuum and nitrogen-hydrogen gas mixture series linkage switch structure with double ultra linkage is built. On the basis of the test arc voltage, the transfer circuit parameters are matched. The results show that, the current breaking ability can be achieved at 2 kA within 3ms and at 5kA within 15ms, which provides feasibility reference for the application of the high arc voltage switching of the vacuum and nitrogen-hydrogen mixed gas series linkage in the DC rapid interrupting.