一例換流變壓器匝間短路故障分析
謝超，李乾坤
（中國(guó)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(guò)程中出現(xiàn)的換流變壓器繞組匝間絕緣故障導(dǎo)致的保護(hù)動(dòng)作，直流系統(tǒng)退出運(yùn)行案例。分析了換流變壓器匝間短路故障過(guò)程，通過(guò)現(xiàn)場(chǎng)試驗(yàn)和解體分析，查找到繞組內(nèi)部的故障點(diǎn)，指出可能是在運(yùn)輸和存放過(guò)程中因受潮導(dǎo)致變壓器內(nèi)部故障的發(fā)生，并對(duì)換流變壓器交接試驗(yàn)和故障后油色譜診斷試驗(yàn)提出了改進(jìn)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(hào)：TM407 文獻(xiàn)標(biāo)識(shí)碼：B 文章編號(hào)：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(xiàn)
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