Study on Interruption Characteristics and Suppression Measures of TRV of High-capacity Generator Circuit Breaker

BAI Yuzhuo; LI Pengfei; GUAN Yudan; FANG Chonghao; GUO Jie; WANG Zhiyuan; QUAN Hengli

doi:10.13296/j.1001-1609.hva.2024.04.012

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Study on Interruption Characteristics and Suppression Measures of TRV of High-capacity Generator Circuit Breaker

Research & Analysis | 更新时间：2025-04-26

- Study on Interruption Characteristics and Suppression Measures of TRV of High-capacity Generator Circuit Breaker
- High Voltage Apparatus Vol. 60, Issue 4, Pages: 92-100(2024)
- 作者机构：
  
  1.国核电力规划设计研究院有限公司，北京　 100089
  2.西安交通大学电气工程学院，西安　 710049
  3.国网冀北电力科学研究院（华北电力科学研究院有限责任公司），北京　 100045
- 作者简介：
- 基金信息：
  
  Science and Technology Project of State Power Investment Group Co., Ltd. (Research on the Application Technology of the Complete Set of Generator Circuit Breakers for Large Advanced Pressurized Water Reactor Nuclear Power Plants)
- DOI：10.13296/j.1001-1609.hva.2024.04.012
  CLC：
- Received：01 December 2023，
  
  Revised：04 February 2024，
  
  Published：16 April 2024
- 稿件说明：
移动端阅览
BAI Yuzhuo, LI Pengfei, GUAN Yudan, et al. Study on Interruption Characteristics and Suppression Measures of TRV of High-capacity Generator Circuit Breaker[J]. High voltage apparatus, 2024, 60(4): 92-100.
DOI：

BAI Yuzhuo, LI Pengfei, GUAN Yudan, et al. Study on Interruption Characteristics and Suppression Measures of TRV of High-capacity Generator Circuit Breaker[J]. High voltage apparatus, 2024, 60(4): 92-100. DOI： 10.13296/j.1001-1609.hva.2024.04.012.

摘要

发电机断路器（GCB）位于发电机组和升压变压器之间，针对负荷电流高达50 kA、故障电流高达200 kA以上的大容量机组，GCB传导和开断电流远高于线路断路器，在开断过程中，GCB两端会产生非常严重的瞬态恢复过电压，威胁GCB的可靠性。文中基于某大型核电站的实际接线，单机容量为1 722.2 MVA，利用EMTP-RV仿真计算研究了GCB在各种故障下开断时的TRV的电磁暂态特性，分析配置不同容量电容器对TRV幅值和陡度的影响效果。提出了采用辅助断口装设非线性阻尼电阻抑制TRV的方法，并给出了非线性阻尼电阻参数选取原则，并通过仿真验证了其可行性，针对失步故障非线性阻尼电阻可使TRV幅值降低29.2%，具有更高的灵活性与经济性。

Abstract

Generator circuit breaker (GCB) is located between the generator set and booster transformer. For high capacity units with load current up to 50 kA and fault current up to 200 kA

the current conducted and interrupted by the GCB is far above that of line circuit breaker. During the interruption period

very serious transient recovery over voltage is generated on both sides of the GCB

threatening reliability of GCB. Based on the actual wiring of a large nuclear power station with capacity of sing unit at 1 722.2 MVA

the electromagnetic transient characteristics of TRV

in case of interruption of GCB at various faults

is calculated and studied by the use of EMPT-RV simulation and the influence effect of capacitor with different capacity configuration on amplitude and steepness of TRV is analyzed. The method of suppressing TRV by adding non-linear damping resistor of auxiliary open contacts is proposed

the principle of parameter selection of the non-linear damping resistor is given and its feasibility is verified by simulation. As for the out of step fault

the non-linear damping resistor can reduce the TRV amplitude by 29.2%

which has higher flexibility and economic performance.

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