一起35 kV站用變非電量保護(hù)跳閘事件分析
張春剛，甘龍，孫西，歐陽(yáng)勁松
（云南電網(wǎng)有限責(zé)任公司昆明供電局，云南 昆明 650000）
摘 要：某500 kV變電站內(nèi)35 kV站用變由于有載調(diào)壓重瓦斯繼電器誤動(dòng)，造成保護(hù)裝置動(dòng)作跳閘，分別從后臺(tái)機(jī)報(bào)文顯示、保護(hù)裝置信息記錄檢查、現(xiàn)場(chǎng)站用變油枕檢查、油樣分析、瓦斯繼電器拆卸檢查等方面全面分析非電量保護(hù)跳閘原因，確定本次跳閘是由于2號(hào)站用變有載調(diào)壓重瓦斯真空管破裂進(jìn)油，導(dǎo)致常開觸點(diǎn)粘死導(dǎo)通引起站用變保護(hù)重瓦斯動(dòng)作。提出相應(yīng)預(yù)防措施，為預(yù)防類似安全隱患參考。
關(guān)鍵詞：站用變；非電量保護(hù)；有載調(diào)壓重瓦斯；預(yù)防措施
中圖分類號(hào)：TM407；TM773 文獻(xiàn)標(biāo)識(shí)碼：B 文章編號(hào)：1007-3175(2019)07-0042-04
A Case of Tripping Accident Analysis of 35 kV Station Transformer on Non-Electricity Protection
ZHANG Chun-gang, GAN Long, SUN Xi, OUYANG Jin-song
（Kunming Power Supply Bureau of Yunnan Power Grid Co., Ltd, Kunming 650000, China）
Abstract: On account of an accident of tripping-out of protective device operation caused by misoperation of gas relay with on-load voltage regulating in a 500 kV substation, this paper comprehensively analyzed the tripping reasons of non electric quantity protection from the aspects of message display of background machine, information record and inspection of protective device, inspection of oil pillow for site substation, oil sample analysis and disassembly inspection of gas relay etc, to make sure that this tripping was caused by gas relay vacuum tube fracture and oil-taking with on-load voltage regulating in No.2 station transformer, leading to normally open contact sticking to make the gas relay action. The corresponding precautionary measures are proposed to provide references for preventing the analogy potential safety hazard.
Key words: station transformer; non electric quantity protection; on load tap changing heavy gas; preventive measures
參考文獻(xiàn)
[1] 陳曉云，張偉光.220 kV變壓器重瓦斯事故分析及預(yù)防措施[J]. 電氣技術(shù)，2018，19(1)：94-96.
[2] 曹鐵山，董德，曾勇，等. 一次主變瓦斯保護(hù)誤動(dòng)的原因及預(yù)防措施[J]. 電氣技術(shù)，2017，18(7)：103-105.
[3] 滿瑞. 一起220 kV電力變壓器重瓦斯誤動(dòng)的事故分析及處理[J]. 變壓器，2016，53(11)：61-63.
[4] 毛知新，文勁宇. 變壓器油中溶解氣體光聲光譜檢測(cè)技術(shù)研究[J]. 電工技術(shù)學(xué)報(bào)，2015，30(7)：135-143.
[5] 安貴元，高輝，楊雪梅，等. 在線監(jiān)測(cè)在高壓電氣設(shè)備工況分析中的典型應(yīng)用[J]. 電氣技術(shù)，2014，15(8)：68-69.
