Analysis on Frequent Pumping of Hydraulic Spring Operating Mechanism for500 kV Circuit Breaker

LIU Yalin; WU Xibo; LI Wei; HU Runge; NIU Tianye

doi:10.13296/j.1001-1609.hva.2022.03.029

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Analysis on Frequent Pumping of Hydraulic Spring Operating Mechanism for500 kV Circuit Breaker

更新时间：2025-04-26

- Analysis on Frequent Pumping of Hydraulic Spring Operating Mechanism for500 kV Circuit Breaker
- High VoltageApparatus Vol. 58, Issue 3, Pages: 215-220(2022)
- 作者机构：
  
  国网河南省电力公司超高压公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2022.03.029
  CLC： TM561
- Published：2022
- 稿件说明：
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LIU Yalin, WU Xibo, LI Wei, et al. Analysis on Frequent Pumping of Hydraulic Spring Operating Mechanism for500 kV Circuit Breaker[J]. High voltageapparatus, 2022, 58(3): 215-220.
DOI：

LIU Yalin, WU Xibo, LI Wei, et al. Analysis on Frequent Pumping of Hydraulic Spring Operating Mechanism for500 kV Circuit Breaker[J]. High voltageapparatus, 2022, 58(3): 215-220. DOI： 10.13296/j.1001-1609.hva.2022.03.029.

摘要

高压断路器液压弹簧机构受制造技术、安装工艺、运行环境等因素影响，运行中可能会出现闭锁、误动、拒动、无法储能、频繁打压等问题。文中基于500 kV H变电站5061断路器液压弹簧机构打压频繁现象，机构解体后发现工作缸内壁高、低压油道孔壁处存在贯穿性裂纹，进而建模进行受力分析，结合裂纹处无损检测、金相组织、电镜分析等试验结果，推定工作缸高压、低压油道孔壁处因应力腐蚀造成开裂，导致设备运行时高压液压油内漏至低压液压油管路，从而引起机构频繁打压。据此，结合停电计划抽查同型号设备，建议厂家加强工艺管控，预防类似现象发生，保证电力系统稳定运行。

Abstract

With the effect of manufacturing technology

installation processing

operating environment and other factors

the hydraulic spring operating mechanism for high voltage circuit breaker may appear such problems during the operation as locking

maloperation

refusal operation

unable charging and frequent pumping etc. In this paper

based on the frequent pumping of hydraulic operating mechanism for 5061 circuit breaker of 500 kV H substation

it is found after the disassembly of the operating mechanism that some long penetrated cracks are existed at high and low pressure conversion oil passage hole wall in the inner wall of the working cylinder. It is presumed through stress analysis by way of modeling and such test results as non-destructive inspection

metallographic structure and electron microscopy analysis that the high and low pressure oil passage hole wall in working cylinder is cracked due to stress corrosion

which leads to the leakage of high pressure hydraulic oil to the low pressure hydraulic oil pipeline during operation

thus causing frequent pumping of the mechanism. On this basis

the same type of mechanism is selectively inspected in combination with power outage plan

the manufacturer is recommend to strengthen process control to prevent occurrence of similar phenomena and ensure stable operation of power system.

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