（State Grid Shangdong Electric Ultra-High Voltage Company, Jinan 250000, China）
Abstract: As the main operating mechanism of high voltage level, the hydraulic spring operating mechanism is prone to frequent pressure and other failures, and in severe cases, it can cause the circuit breaker to lock, thereby expanding the range of faults. Through the analysis of a 500 kV GIS circuit breaker frequent pressure problem, the on-site inspection of the energy storage control loop is not abnormal, after disassembly,it is found that there are cracks in the inner wall of the working cylinder, resulting in the high pressure area and the low pressure area are connected, and the pressure is frequent. Through macroscopic inspection, metallographic detection, energy spectrum analysis, material review,mechanical performance testing and other methods, the crack causes were deeply studied. Combined with the operation principle of the hydraulic mechanism and the comparison of the working cylinder materials, it was finally determined that the reason for the frequent pressure of the mechanism was the poor processing quality of the working cylinder, and the finished material had relatively many microscopic defects,resulting in axial stress concentration and cracks in the working cylinder. Based on this, the treatment scheme of the same type circuit breaker is given to avoid equipment outage caused by the same problem and ensure the safe operation of the power system.
Key words: circuit breaker; working cylinder; frequent pressure; stress concentration
參考文獻
[1] 劉靖羽.GIS 設備現場典型故障及質量管控措施研究分析[J]. 電工電氣，2024(1) ：65-70.
[2] 國家電網公司人力資源部. 電氣設備及運行維護[M] .北京：中國電力出版社，2010.
[3] 梁旭日，麻震爍，李冰玉，等. 一起 500 kV 液壓彈簧機構斷路器油壓低分合閘閉鎖故障原因分析[J]. 電氣技術，2022，23(9) ：93-96.
[4] 楊靜文，劉永康，陳雙. 特高壓液壓機構斷路器低油壓閉鎖重合閘分析[J]. 電工電氣，2022(7) ：74-76.
[5] 李紹武， 李昌靜， 孫錦， 等. 一起 110 kV GIS 斷路器彈簧操動機構故障分析與處理[J] . 電工電氣，2021(11) ：74-76.
[6] 劉亞林，吳西博，李威, 等.500 kV 斷路器液壓彈簧機構頻繁打壓故障的分析[J] . 高壓電器，2022，58(3) ：215-220.
[7] 林向宇，連和，莊建煌，等. HMB-4 型液壓彈簧機構拒分閘故障的現場檢修與防范[J] . 電工電氣，2018(11) ：72-73.
[8] 王偉，房婷婷. 一起高壓斷路器液壓彈簧操動機構儲能回路故障的處置[J]. 電工電氣，2016(3) ：63-64.
[9] 李清泉，李相棟，馮知海. 一起斷路器合閘不到位故障處置流程及原因分析[J]. 電工電氣，2023(6) ：44-48.
[10] 馬佳豪，孫海濤，胡俊，等. 一起 800 kV 斷路器液壓機構頻繁打壓故障及分析[J] . 高壓電器，2019，55(9) ：247-253.
[11] 曾令誠，李新海，林悅德，等. HMB-4 型液壓彈簧機構缺陷處理與關鍵檢修策略[J] . 電氣應用，2019，38(9) ：102-108.
[12] 李鍇，徐成西.HMB 型液彈儲能機構故障探析及改進措施[J]. 農村電氣化，2023(10) ：27-30.
[13] 王磊，張恩光，楊建偉. HMB-8.3 型液壓彈簧機構頻繁打壓故障分析與防范[J] . 機械研究與應用，2021，34(5) ：178-180.
[14] 羊鑫.HMB 型液壓彈簧操作機構電機頻繁啟動故障原因分析與預防措施[J] . 水電與新能源，2023，37(10) ：43-45.
[15] 張卓，李威，劉亞林，等.500 kV 液壓彈簧機構頻繁打壓故障的分析[J]. 高壓電器，2023，59(10) ：240-246.
[16] 李子由，趙銀山.500 kV 開關儲能機構異常打壓故障分析[J]. 云南電力技術，2023，51(5) ：56-60.
[17] 李德武，黃衍臻，張秋強.500 kV HGIS 液壓操動機構頻繁打壓原因分析及對策[J]. 電工技術，2021(22) ：89-91.
