一起短路沖擊引起110 kV變壓器故障的診斷及處理
楊紅權(quán),邱煒,杜偉,陳佳,曾奕凡,楊光,李建,秦明
(國網(wǎng)四川省電力公司成都供電公司,四川 成都 610000)
摘 要:變壓器的安全穩(wěn)定運(yùn)行是電網(wǎng)可靠供電的重要保證。對(duì)一起突發(fā)短路引發(fā)的 110 kV 變壓器損壞的事故進(jìn)行診斷試驗(yàn)和分析,判斷出了主變存在低壓側(cè) a 相線圈部分?jǐn)喙?,?duì)地短路的故障,通過返廠解體印證了診斷結(jié)果,并給出了應(yīng)對(duì)措施,為類似變壓器經(jīng)短路沖擊后的診斷提供了參考經(jīng)驗(yàn)。
關(guān)鍵詞:變壓器;診斷試驗(yàn);油色譜分析;直流電阻;絕緣試驗(yàn)
中圖分類號(hào):TM407 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):1007-3175(2021)12-0040-03
Diagnosis and Analysis of a 110 kV Transformer Fault
Caused by Short Circuit Impulse
YANG Hong-quan, QIU Wei, DU Wei, CHEN Jia, ZENG Yi-fan, YANG Guang, LI Jian, QIN Ming
(Chengdu Power Supply Company of State Grid Sichuan Electric Power Company, Chengdu 610000, China)
Abstract: The safe and stable operation of the transformer is a crucial part of the reliable power supply of the power grid. This paper diagnosed and analyzed an accident caused by a sudden short circuit in a 110 kV transformer. It determined that the transformer faults partial broken strand and short circuit to the ground of phase an at low voltage side. The diagnosis results were confirmed by returning to the factory for disassembly. This research provides a reference to the diagnosis of similar transformers after short-circuit impact.
Key words: transformer; diagnostic test; oil chromatographic analysis; DC resistance; insulation test
參考文獻(xiàn)
[1] 易梅生,歐強(qiáng),施廣宇,王亞欽,鄒宇星,敖喜明. 變壓器標(biāo)準(zhǔn)短路試驗(yàn)與運(yùn)行短路故障的關(guān)系研究[J].變壓器,2021,58(6) :13-16.
[2] 敖志寧,孟天男,井永騰,李巖,鄒德旭.110 kV 電力變壓器繞組短路強(qiáng)度的計(jì)算與評(píng)估[J] . 變壓器,2021,58(5) :18-22.
[3] 葛猛,藺樹全,常群,尚澤禹,陶安培. 近區(qū)短路電流沖擊后大容量變壓器故障診斷[J] . 高壓電器,2019,55(5) :62-68.
[4] 張志恒. 一起 35 kV 主變油色譜數(shù)據(jù)異常分析及處理[J]. 青海電力,2021,40(1) :61-64.
[5] 蔡昆. 基于改良三比值法的變壓器油色譜在線監(jiān)測(cè)應(yīng)用研究[D]. 廣州:華南理工大學(xué),2018.
[6] 電力行業(yè)電力變壓器標(biāo)準(zhǔn)化委員會(huì). 變壓器油中溶解氣體分析和判斷導(dǎo)則:DL/T 722—2000[S]. 北京:中國標(biāo)準(zhǔn)出版社,2001 :1-21.