750 kV并聯電抗器油色譜異常故障診斷及分析
王永奇，王懷祥，李明，周家戌，常永哲
（國網甘肅省電力公司電力科學研究院，甘肅 蘭州 730050）
摘 要： 介紹了一起750 kV 并聯電抗器出現油色譜監測數據嚴重異常的故障，分析了故障產生的原因，利用特征氣體、大衛三角和改良“三比值”等油色譜分析手段，結合診斷性電氣試驗，成功診斷出了該電抗器故障是屬于放電性故障，經過吊罩檢查分析，電抗器內部放電是由于地腳螺栓松動引起的，給出了應對措施，為故障處理提供了方案。
關鍵詞： 電抗器；油色譜分析；故障診斷；處理
中圖分類號：TM471+.2 文獻標識碼：B 文章編號：1007-3175(2015)03-0052-03
Fault Diagnosis and Analysis of Abnormal Oil Chromatographic of 750 kV Shunt Reactors
WANG Yong-qi, WANG Huai-xiang, LI Ming, ZHOU Jia-xu, CHANG Yong-zhe
（Electric Power Research Institute of Gansu Electric Power Corporation, Lanzhou 730050, China）
Abstract: Introduction was made to the abnormal oil chromatographic monitoring data fault that happened to 750 kV shunt reactors. This paper analyzed the reasons of the faults, took oil chromatographic analysis methods, such as characteristic gas, Duval’s triangle and improved three-ratio and combined with diagnostic electrical test, to successfully diagnose that the reactor fault belonged to discharging fault. By making inspection and analysis to the hoisting cover, prevention measures have been made to avoid the inner discharge of reactors caused by the looseness of anchor bolts, which provides the solution for faults treatment.
Key words: reactor; analysis of oil chromatographic; malfunction diagnosis; treatment
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