Research on the Closing Strategy of Fast Vacuum Circuit Breaker for Capacitor Bank Phase-controlled Switching

MA Feiyue; NIU Yuqian; SUN Shangpeng; YAO Xiaofei; NIU Bo; JIANG Rui; BAI Tao

doi:10.13296/j.1001-1609.hva.2025.12.005

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Research on the Closing Strategy of Fast Vacuum Circuit Breaker for Capacitor Bank Phase-controlled Switching

Research & Analysis | 更新时间：2025-12-09

- Research on the Closing Strategy of Fast Vacuum Circuit Breaker for Capacitor Bank Phase-controlled Switching
- High Voltage Apparatus Vol. 61, Issue 12, Pages: 33-41(2025)
- 作者机构：
  
  国网宁夏电力有限公司电力科学研究院，银川 750011
  西安交通大学电气工程学院，西安 710049
  国网宁夏电力有限公司石嘴山供电公司，宁夏石嘴山 753000
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2025.12.005
  CLC：
- Received：09 August 2025，
  
  Revised：2025-10-14，
  
  Published：16 December 2025
- 稿件说明：
移动端阅览
MA Feiyue, NIU Yuqian, SUN Shangpeng, et al. Research on the Closing Strategy of Fast Vacuum Circuit Breaker for Capacitor Bank Phase-controlled Switching[J]. High Voltage Apparatus, 2025, 61(12): 33-41.
DOI：

MA Feiyue, NIU Yuqian, SUN Shangpeng, et al. Research on the Closing Strategy of Fast Vacuum Circuit Breaker for Capacitor Bank Phase-controlled Switching[J]. High Voltage Apparatus, 2025, 61(12): 33-41. DOI： 10.13296/j.1001-1609.hva.2025.12.005.

摘要

随着新型电力系统建设的持续推进，系统特性的变化要求变电站并联电容组无功投切更加频繁，但更适应于频繁投切场景的真空断路器，因涌流影响下重击穿概率高的问题而在高电压等级电容器组应用较少。为解决真空断路器在电容器组投切场景下的弊病，文中以快速真空断路器为基础，实验研究实际工频电压作用下真空断路器预击穿特性，分析关合工频电压预击穿瞬时值与触头开距的关系，获得电容器组投切快速真空断路器相控关合策略，确定了在1.21、1.43、1.83 m/s合闸速度条件下快速真空断路器关合预击穿绝缘强度下降率（RDDS）带状区域，提出了选相关合时间窗口：自电压下降阶段RDDS带状区域的下边界与电压波形的交点所对应的时间点至电压上升阶段RDDS带状区域的上边界与电压波形的交点所对应的时间点。实验结果验证了选相关合策略的可行性，为电容器组投切快速真空断路器选相关合奠定基础。

Abstract

With the ongoing development of the new power system

evolving system charactersitics necessite more frequent reactive power switching of shunt capacitor banks in substations. However

vacuum circuit breakers

which are more suitable for frequent switching scenarios

see limited application in high voltage capacitor banks due to their probability of restrike under inrush current conditions. To address the limitations of vacuum circuit breakers in capacitor bank switching scenarios

in this paper the fast vacuum circuit breakers is taken as the basis to experimentally study the prestrike characteristics of the vacuum circuit breakers under the action of actual power frequency voltage. The relationship between the instantaneous value of the making power frequency voltage prestrikeand the contact clearance is analyzedto derive a phase-controlled closing strategy for the fast vacuum circuit breaker in capacitor bank switching. The band-shaped region of the reduced rate of the making pre-strike dielectric strength (RDDS) of fast vacuum circuit breakersat the closing speed of 1.21 m/s

1.43 m/s

and 1.83 m/s is defined. The selected closing time window is proposed：From the time point corresponding to the intersection of the lower boundary of the RDDS band region in the voltage drop stage with the voltage waveform

to the time point corresponding to the intersection of the upper boundary of the RDDS band region in the voltage rise stage with the voltage waveform.The feasibility of the selected closing strategy is verified by the experimental result

thereby paving the way for its implementation in fast vacuum circuti breaker in capacitor bank switching.

关键词

Keywords

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