輸電線路引流板發(fā)熱的原因分析和試驗研究
吳正樹1,張明洲1,張利娜2,荀雪峰3,李清燕3
(1 中國南方電網超高壓輸電公司南寧局,廣西 南寧 530021;2 南京電力金具設計研究院有限公司,江蘇 南京 211500;3 中國能源建設集團南京線路器材有限公司,江蘇 南京 211500)
摘 要:超高壓輸電線路中耐張線夾的引流板出現(xiàn)不明原因發(fā)熱甚至燒損現(xiàn)象,經停電檢修處理后,仍然發(fā)生此類發(fā)熱故障。通過收集超高壓輸電線路中耐張線夾引流板發(fā)熱造成有缺陷的實物,據(jù)此進行發(fā)熱原因分析,并進行模擬線路運行的電阻和溫升試驗,試驗驗證了電力復合脂導流性能差、螺栓松動后接觸壓力降低和接觸面處理不當是造成引流板嚴重發(fā)熱甚至燒損的主要原因。
關鍵詞:引流板;發(fā)熱燒損;電力復合脂;接觸壓力;接觸面
中圖分類號:TM726 文獻標識碼:B 文章編號:1007-3175(2020)12-0052-04
Analysis and Experimental Study on the Causes of Heating of Drainage Plate of Transmission Line
WU Zheng-shu1, ZHANG Ming-zhou1, ZHANG Li-na2, XUN Xue-feng3, LI Qing-yan3
(1 Nanning Bureau of EHV Transmission Company, China Southern Power Urid Co., Ltd, Nanning 530021, China;
2 Nanjing Power Fitting Design & Research Institute Co., Ltd, Nanjing 211 500, China;
3 Nanjing Line Accessories Co.,Ltd of China Energy Engineering Group, Nanjing 211 500, China)
Abstract: This paper study a case that the drain plate of the tension clamp in the ultra-high voltage transmission line has heat or even burned for unknown reasons. This type of heat failure still occurs after the power failure is repaired. By collecting the defective objects caused by the heating of the tension clamp drain plate in the ultra-high voltage transmission line, the reason of heating was analyzed based on this, and the resistance and temperature rise tests that simulated the operation of the line were carried out. The test verified the poor conductivity of the power compound grease. The decrease in contact pressure and improper handling of the contact surface after the bolts are loose are the main reasons for the serious heating and even burning of the draft plate.
Key words: drainage plate; burn after heating; electrical joint compound; contact pressure; contact surface
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