Suzhou Electric Appliance Research Institute
期刊號(hào): CN32-1800/TM| ISSN1007-3175

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某變電站35 kV電壓并列裝置燒毀的原因分析

來源:電工電氣發(fā)布時(shí)間:2017-04-21 13:21 瀏覽次數(shù):13
某變電站35 kV電壓并列裝置燒毀的原因分析
 
杜嚴(yán)行,葉樹平,胡強(qiáng)暉,翟虎成
(國網(wǎng)寧東供電公司,寧夏 銀川 750411)
 
    摘 要:針對(duì)地區(qū)電網(wǎng)中某變電站一起35 kV 電壓互感器并列裝置燒毀的現(xiàn)象,從電壓并列裝置的原理出發(fā),結(jié)合故障現(xiàn)象,運(yùn)用戴維南等效電路原理闡述了電力系統(tǒng)鐵磁諧振機(jī)理,通過分析電磁油浸式電壓互感器的原理與內(nèi)部結(jié)構(gòu),得出了單相接地及其過程引起的鐵磁諧振過電壓竄入二次側(cè)回路是導(dǎo)致該電壓并列裝置兩次燒毀的實(shí)際原因。給出了消除或抑制電壓互感器鐵磁諧振的多種應(yīng)對(duì)措施,為今后確保電網(wǎng)安全穩(wěn)定運(yùn)行提供參考。
    關(guān)鍵詞:鐵磁諧振;電壓并列裝置;燒毀;防范措施
    中圖分類號(hào):TM451     文獻(xiàn)標(biāo)識(shí)碼:B     文章編號(hào):1007-3175(2017)04-0035-05
 
Cause Analysis of 35 kV Voltage Paralleling Device Burning in Certain Substation
 
DU Yan-xing, YE Shu-ping, HU Qiang-hui, ZHAI Hu-cheng
(State Grid Ningdong Power Supply Company, Yinchuan 750411 , China)
 
    Abstract: In allusion to a case of 35 kV voltage transformer burning phenomenon of regional grid substation devices, starting from the principle of the voltage paralleling device and combining with the fault phenomenon, this paper adopted Thevenin equivalent circuit principle to expound the ferromagnetic resonance mechanism of electrical power system. Analysis was made to the principle and interior structure of electromagnetism oil immersed voltage transformer. The one-phase ground was obtained and its process that created ferromagnetic resonance overvoltage plunging into the circuit at secondary side was the actual cause of the voltage paralleling device twice burning. This paper gave a variety of measures to eliminate and suppress the voltage transformer ferromagnetic resonance, which provides references for safe and stable operation of the power grid in future.
    Key words: ferromagnetic resonance; voltage paralleling device; burn; precautionary measure
 
參考文獻(xiàn)
[1] 李堅(jiān). 電網(wǎng)運(yùn)行及調(diào)度技術(shù)問答[M]. 北京:中國電力出版社,2004.
[2] 羅軍川.35 kV電容式電壓互感器高壓熔斷器的原因分析[J]. 高壓電器,2009,45(3):124-127.
[3] 陳志平, 金向朝.10 kV電磁式電壓互感器熔斷器頻繁燒毀事故分析[J]. 南方電網(wǎng)技術(shù),2009,3(S1):154-157.
[4] 王文洪.10 kV電壓互感器的燒毀的原因分析和防范對(duì)策[J]. 廣東輸電與變電技術(shù),2005(6):65-67.
[5] 梅林. 電壓互感器并列裝置燒毀事故[J]. 電世界,2006,47(3):38.
[6] GB 1207—2006電磁式電壓互感器[S].
[7] 要煥年,曹梅月. 電力系統(tǒng)諧振接地[M].2 版. 北京:中國電力出版社,2009.
[8] 武萬才,吳志勇,邊疆,等. 地區(qū)電網(wǎng)電磁式電壓互感器燒損和高壓熔絲熔斷原因分析[J]. 高壓電器,2011,47(3):87-92.