開關(guān)柜局部放電分析定位
魏彬,王欣,杜岳凡,王小朋,董政,閆立東,劉常軍
(國(guó)網(wǎng)天津市電力公司檢修公司, 天津 300304)
摘 要:受開關(guān)柜結(jié)構(gòu)緊湊特點(diǎn)的制約,巡檢過(guò)程中對(duì)放電類型分析和放電位置確定存在一定困難。綜合利用特高頻法和高頻電流法對(duì)某 220 kV 變電站開關(guān)柜套管放電缺陷進(jìn)行分析并定位,應(yīng)用特高頻法發(fā)現(xiàn)開關(guān)柜放電信號(hào)后,結(jié)合特高頻時(shí)差法和高頻電流定位,分析確定放電原因并最終通過(guò)解體驗(yàn)證了檢測(cè)結(jié)果,說(shuō)明放電位置判斷正確。
關(guān)鍵詞:開關(guān)柜;局部放電;特高頻法;高頻電流
中圖分類號(hào):TM591 ;TM855 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):1007-3175(2021)09-0050-04
Analysis and Location of Partial Discharge of Switchgear
WEI Bin, WANG Xin, DU Yue-fan, WANG Xiao-peng, DONG Zheng, YAN Li-dong, LIU Chang-jun
(State Grid Tianjin Electric Power Maintenance Company, Tianjin 300304, China)
Abstract: Restricted by the compact structure of the switchgear, it is difficult to analyze the discharge type and determine the discharge location during the inspection process. In this paper, UHF method and high frequency current method are used to analyze and locate the discharge defects of the switchgear casing of a 220 kV substation. After finding discharge signals of switchgear through UHF, UHF and high frequency current method are combined to analyze the cause of discharge, and finally the testing results are verified by the disassembly, indicating the right judgment of the discharge location.
Key words: switchgear; partial discharge; UHF method; high frequency current
參考文獻(xiàn)
[1] 鄧志祥,康琛,王華云,等.10 kV 開關(guān)柜穿屏套管的局部放電檢測(cè)與結(jié)構(gòu)優(yōu)化[J] . 電瓷避雷器,2019(2) :226-230.
[2] 王鵬,劉玉婷,鄒陽(yáng),等. TEV 和超聲波檢測(cè)法在開關(guān)柜局部放電檢測(cè)中的應(yīng)用評(píng)述[J] . 高壓電器,2020,56(10) :75-83.
[3] 趙常威,丁國(guó)成,楊為,等. 基于開關(guān)柜缺陷模型的局放檢測(cè)方法對(duì)比研究[J] . 高壓電器,2019,55(3) :220-225.
[4] 孫進(jìn), 梅凡, 陳月, 等. 聲電聯(lián)合檢測(cè)法在開關(guān)柜局部放電事故分析中的應(yīng)用[J] . 電工技術(shù),2020(24) :94-95.
[5] 郭超,劉君,周波,等. 開關(guān)柜帶電檢測(cè)應(yīng)用分析與解體實(shí)例[J]. 電工電氣,2019(10) :42-46.
[6] 李建明.35 kV 開關(guān)柜穿柜套管故障原因分析[J] .電力安全技術(shù),2021,23(1) :37-38.