Influence of Grading Mode on Interruption Characteritics with Minimum Arcing Time of Double-break Vacuum Circuit Breakers

GUAN Chen; MU Shuanglu; WANG Qiong; JI Bobo; YAO Xiaofei

doi:10.13296/j.1001-1609.hva.2026.09.004

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Influence of Grading Mode on Interruption Characteritics with Minimum Arcing Time of Double-break Vacuum Circuit Breakers

High-voltage Switchgear and GIS/GIL Technology | 更新时间：2026-09-10

- Influence of Grading Mode on Interruption Characteritics with Minimum Arcing Time of Double-break Vacuum Circuit Breakers
- High Voltage Apparatus Vol. 62, Issue 9, Pages: 33-42(2026)
- 作者机构：
  
  西安西电开关电气有限公司，西安 710075
  西安交通大学电气工程学院，西安 710049
- 作者简介：
- 基金信息：
  
  National Key Research and Development Program of China(2022YFB2403700)
- DOI：10.13296/j.1001-1609.hva.2026.09.004
  CLC：
- Received：11 March 2026，
  
  Revised：2026-05-16，
  
  Published：16 September 2026
- 稿件说明：
移动端阅览
GUAN Chen, MU Shuanglu, WANG Qiong, et al. Influence of Grading Mode on Interruption Characteritics with Minimum Arcing Time of Double-break Vacuum Circuit Breakers[J]. High Voltage Apparatus, 2026, 62(9): 33-42.
DOI：

GUAN Chen, MU Shuanglu, WANG Qiong, et al. Influence of Grading Mode on Interruption Characteritics with Minimum Arcing Time of Double-break Vacuum Circuit Breakers[J]. High Voltage Apparatus, 2026, 62(9): 33-42. DOI： 10.13296/j.1001-1609.hva.2026.09.004.

摘要

文中建立了双断口真空断路器短路电流开断实验系统，设置7组变量对照试验，系统研究了电容均压、阻容均压两种均压方式对短燃弧时间、临界熄弧开距、断口分压特性及非同期击穿暂态过程的影响规律。试验结果表明：与无均压工况相比，电容均压与阻容均压均可显著缩短短燃弧时间、减小临界熄弧开距，提升短燃弧开断性能；电容均压下，增大均压电容可改善断口电压均衡性，但性能提升呈饱和趋势；阻容均压下，开断性能随串联电阻增大先提升后下降，电阻为40 kΩ时综合性能最优。非同期击穿暂态过程分析表明，阻容均压可使击穿断口快速恢复承压，改善断口电压分配，而电容均压与无均压工况无此特性；纯电容均压的开断性能由分压均匀性主导，阻容均压则由分压均匀性与非同期击穿后的快速电压恢复共同决定。文中研究结论可为双断口真空断路器均压方案遴选、均压支路参数匹配设计提供理论支撑与工程实践参考。

Abstract

In this paper

an experimental system for short-circuit current interruption of double-break vacuum circuit breakers is set up. Seven groups of controlled variable comparison tests are set up to systematically investigate the influence of capacitive grading and

grading on minimum arcing time

critical arc-extinguishing gap

voltage distribution and transient characteristics across the breaker

and the transient process of asynchronous breakdown. The test results show that

compared to the case without grading mode

both capacitive and

grading modes can effectively shorten the minimum arcing time

reduce critical arc-extinguishing gap and enhance minimum arcing interruption capability. In case of capacitive grading

increasing grading capacitance can improve voltage uniformity across open contacts

but the perfroamnce enhancement shows saturation trend. While

in case of

grading

the interruption performance first increases and then decreases with the series resistance

reaching the o

ptimum performance at resiatance of 40 kΩ. The transient process analysis of asynchronous breakdown indicates that

R-C

granding enables the breakdown contacts to rapidly rrecover its voltage-withstanding capability and improves the voltage distribution across open contacts

whereas neither capacitve grading nor the condition without grading exhibits such characteristics. The interruption performance of pure capacitive voltage grading is governed by the uniformity of voltage distribution

while that of

voltage grading is determined the uniformity of voltge grading and the rapid voltage recovery following asynchronuous breakdown. The conclusion in this paper can provide theoretical support and engineering reference for grading scheme selection and parameter optimization of double-break vacuum circuit breakers.

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references

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