220 kV同塔雙回線路終端塔避雷器試驗(yàn)分析
王少華，申劍，李特，周象賢，韓睿
（國網(wǎng)浙江省電力有限公司電力科學(xué)研究院，浙江 杭州 310014）
摘 要：電網(wǎng)中線路避雷器故障屢有發(fā)生，直接影響線路安全運(yùn)行。對某220 kV 同塔雙回線路終端塔避雷器進(jìn)行了測試及解體分析。試驗(yàn)結(jié)果表明，避雷器直流1mA參考電壓。密封性能符合標(biāo)準(zhǔn)要求，局部放電測試未發(fā)現(xiàn)明顯放電信號(hào)，解體后避雷器內(nèi)部未發(fā)現(xiàn)異常放電痕跡，判斷Ⅰ回線路避雷器爆炸為避雷器個(gè)別性內(nèi)部缺陷造成，Ⅱ回線路故障放電并非避雷器引起。對線路進(jìn)站避雷器安裝于終端塔上的選型進(jìn)行了討論，建議相應(yīng)避雷器應(yīng)采用短間隙避雷器。
關(guān)鍵詞：避雷器；終端塔；密封性；間隙
中圖分類號(hào)：TM862 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1007-3175(2021)01-0051-03
Test Analysis of Line Arresters Installed on Terminal Tower of 220 kV
Double-Circuit Transmission Line on the Same Tower
WANG Shao-hua, SHEN Jian, LI Te, ZHOU Xiang-xian, HAN Rui
（State Grid Zhejiang Electric Power Research Institute, Hangzhou 310014, China）
Abstract: Line arrester failures frequently occur in the power grid, it directly affecting the safe operation of the line. The lightning arresterfor the terminal tower of a 220kV double-circuit line on the same tower was tested and disassembled. The test results show that the 1 mADC reference voltage and sealing performance of the arrester meet the requirements of the standard. No obvious discharge signal is found inthe partial discharge test. No abnormal discharge traces are found inside the arrester after disassembly. It is judged that the explosion of thearrester in the I circuit is caused by individual internal defects, and II circuit fault discharge is not caused by the arrester. The selection of thelightning arrester installed on the terminal tower of the line inbound is studied, and it is suggested that the corresponding arrester should be ashort-gap arrester.
Key words: arrester; terminal tower; tightness; gap
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