變電站屏蔽網(wǎng)破損對站內(nèi)電壓的影響
吳昊,沈志祺,安帥
(國網(wǎng)上海市電力公司市北供電公司,上海 200072)
摘 要:屏蔽網(wǎng)可以抑制變電站內(nèi)感應(yīng)電壓,保護(hù)站內(nèi)二次設(shè)備的運行安全。為研究屏蔽網(wǎng)破損產(chǎn)生的影響,利用有限元建模研究屏蔽網(wǎng)破損位置和破損大小對變電站感應(yīng)電壓的影響。經(jīng)過模型建立并計算,仿真結(jié)果表明:與變電站側(cè)面屏蔽網(wǎng)破損相比,頂部屏蔽網(wǎng)有破損時,變電站內(nèi)平均感應(yīng)電壓更大;變電站頂部中央的屏蔽網(wǎng)破損對變電站內(nèi)感應(yīng)電壓影響最大;頂部破損越大,站內(nèi)平均感應(yīng)電壓越大;距離缺失的屏蔽網(wǎng)越近,感應(yīng)電壓越高。
關(guān)鍵詞:變電站;屏蔽網(wǎng);有限元分析;感應(yīng)電壓
中圖分類號:TM631 文獻(xiàn)標(biāo)識碼:B 文章編號:1007-3175(2017)11-0022-03
Influence of Broken Shielded Network on Instation Voltage in Substation
WU Hao, SHEN Zhi-qi, AN Shuai
(Shibei Power Supply Company of State Grid Shanghai Municipal Electric Power Company, Shanghai 200072, China)
Abstract: The shielded network can inhibit the instation induced voltage in substation and protected the secondary equipment safety operation. In order to research on the impacts caused by the broken shielded network, this paper used the finite element modeling to research the impacts of broken location and size of the shielded network on the induced voltage in substation. Via modeling and calculation, the simulation result shows that compared with the broken shielded network at the side of substation, the broken shielded network would make the average instation induced voltage larger and the top central broken shielded network in substation would have the maximum impact on the instation induced voltage. The larger the top shielded network break is, the larger the average instation induced voltage is. The closer the distance of missing shielded network is, the higher voltage could be induced.
Key words: substation; shielded network; finite element analysis; induced voltage
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