一例換流變壓器匝間短路故障分析
謝超，李乾坤
（中國南方電網(wǎng)超高壓輸電公司廣州局，廣東 廣州 510663）
摘 要：介紹了一例在調(diào)試過程中出現(xiàn)的換流變壓器繞組匝間絕緣故障導致的保護動作，直流系統(tǒng)退出運行案例。分析了換流變壓器匝間短路故障過程，通過現(xiàn)場試驗和解體分析，查找到繞組內(nèi)部的故障點，指出可能是在運輸和存放過程中因受潮導致變壓器內(nèi)部故障的發(fā)生，并對換流變壓器交接試驗和故障后油色譜診斷試驗提出了改進建議。
關(guān)鍵詞：換流變壓器；匝間短路；解體分析；油色譜分析
中圖分類號：TM407 文獻標識碼：B 文章編號：1007-3175(2016)10-0036-03
Analysis of a Case of Turn-to-Turn Short-Circuit
Fault in Converter Transformer
XIE Chao, LI Qian-kun
（Guangzhou Bureau of Extra High Voltage Power Transmission Company, China Southern Power Grid, Guangzhou 510663, China）
Abstract: Introduction was made to a case of protective action, emerging in debugging process, caused by the converter transformer winding turn-to-turn insulation fault and a case that the direct current system stopped operation. Analysis was made to the converter transformer winding turn-to-turn insulation fault process and the interior fault point of winding was found by field test and disassembling analysis. It is pointed out that in the process of transportation and storage damping will lead to transformer interior fault. This paper proposes improved suggestions for the converter transformer commissioning test and the oil chromatography diagnostic test after faults.
Key words: converter transformer; turn-to-turn short circuit; disassembling analysis; oil chromatography analysis
參考文獻
[1] 趙畹君. 高壓直流輸電工程技術(shù)[M]. 北京：中國電力出版社，2004.
[2] 張海燕， 常勇， 陜?nèi)A平. 超高壓直流輸電系統(tǒng)換流變壓器運行維護總結(jié)[J]. 電網(wǎng)技術(shù)，2009，33(19)：186-189.
[3] GB/T 7252—2001變壓器油中溶解氣體分析和判斷導則[S].
