800 kV Fast Circuit Breaker: Mechanical Coupling Modelling, Buffer Design and Development

Enyuan Dong; Sheng Yin; Yu Tian; Liyan Zhang; Ruilei Gong; Kejia Xie; Zhibing Li

doi:10.1049/hve2.70193

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800 kV Fast Circuit Breaker: Mechanical Coupling Modelling, Buffer Design and Development

更新时间：2026-07-03

- 800 kV Fast Circuit Breaker: Mechanical Coupling Modelling, Buffer Design and Development
- High Voltage Vol. 11, Issue 3, (2026)
- 作者机构：
  
  1. School of Electrical Engineering, Dalian University of Technology,Dalian,China
  2. China Electric Power Research Institute,Beijing,China
  3. Shandong Taikai High Voltage Switchgear Co. Ltd., Taian,China
- 作者简介：
- 基金信息：
- DOI：10.1049/hve2.70193
  CLC：
- Published：2026
- 稿件说明：
移动端阅览
Enyuan Dong, Sheng Yin, Yu Tian, et al. 800 kV Fast Circuit Breaker: Mechanical Coupling Modelling, Buffer Design and Development[J]. High Voltage, 2026, 11(3).
DOI：

Enyuan Dong, Sheng Yin, Yu Tian, et al. 800 kV Fast Circuit Breaker: Mechanical Coupling Modelling, Buffer Design and Development[J]. High Voltage, 2026, 11(3). DOI： 10.1049/hve2.70193.

摘要

The 800 kV fast circuit breaker (CB) used in ultra-high voltage (UHV) converter transformer can reduce the total breaking time to 25 ms. It significantly improves the action speed and breaking capacity of the CB

with promising broad application prospects. However

fast CBs can generate significant impact and vibration during fast operation. It may threaten the mechanical life and reliability of the CB. This article proposes a modelling method for the fast CB

which couples the multi-physical fields of the Thomson coil release system (TCRS) and the hydraulic system. It can describe the entire process of the opening action. Based on the simulation model

the buffering processes of the TCRS and the hydraulic system are calculated and designed

respectively. A throttle valve provides hydraulic buffering force within the TCRS oil circuit. The stepped buffer column

combining cylindrical and conical buffer structures

balances the buffer force and achieves steady deceleration. Based on these design parameters

an 800 kV fast CB is successfully developed

validating the accuracy of the simulation calculations. Results indicate that the TCRS tripping time is 2.62 ms

the CB breaking time is 7.92 ms

and the mechanical life of the CB is 10

000 times.

Abstract

with promising broad application prospects. However

fast CBs can generate significant impact and vibration during fast operation. It may threaten the mechanical life and reliability of the CB. This article proposes a modelling method for the fast CB

which couples the multi-physical fields of the Thomson coil release system (TCRS) and the hydraulic system. It can describe the entire process of the opening action. Based on the simulation model

the buffering processes of the TCRS and the hydraulic system are calculated and designed

respectively. A throttle valve provides hydraulic buffering force within the TCRS oil circuit. The stepped buffer column

combining cylindrical and conical buffer structures

balances the buffer force and achieves steady deceleration. Based on these design parameters

an 800 kV fast CB is successfully developed

validating the accuracy of the simulation calculations. Results indicate that the TCRS tripping time is 2.62 ms

the CB breaking time is 7.92 ms

and the mechanical life of the CB is 10

000 times.

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