一起特殊結(jié)構(gòu)的110 kV CVT故障診斷與分析
羅楊,劉彥琴,楊新春,彭曉娟,邱煒,田子山
(國網(wǎng)成都供電公司,四川 成都 610041)
摘 要:針對(duì)一種老式電容式電壓互感器(CVT)出現(xiàn)的二次失壓情況,進(jìn)行了診斷試驗(yàn),并根據(jù)其結(jié)構(gòu)特點(diǎn)進(jìn)行了分析和綜合判斷,發(fā)現(xiàn)其電磁單元避雷器老化擊穿,從而導(dǎo)致CVT二次失壓。建議制造廠改進(jìn)設(shè)計(jì),將電磁單元變壓器的一次端通過小套管引出,便于用戶對(duì)其進(jìn)行試驗(yàn)。
關(guān)鍵詞:電容式電壓互感器;電容量;介損;變比;故障診斷
中圖分類號(hào):TM451+.2 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):1007-3175(2018)08-0055-04
Fault Diagnosis and Analysis on 110 kV Constant Voltage Transformer with Special Structure
LUO Yang, LIU Yan-qin, YANG Xin-chun, PENG Xiao-juan, QIU Wei, TIAN Zi-shan
(State Grid Chengdu Supply Power Company, Chengdu 610041, China)
Abstract: In view of secondary circuit voltage loss situation of a kind of outdated capacitor voltage transformer (CVT), the diagnostic test was carried out. According to the structural features of the CVT, this paper performed the analysis and synthesis judgment, finding that the serious aging of arrester led to the secondary circuit voltage loss It is suggested that the manufacturer should improve the design and bring the primary end of electromagnetism element transformer out of a small drivepipe to be convenient for users to carry out tests.
Key words: capacitor voltage transformer; capacitance; dielectric loss; ratio of transformation; fault diagnosis
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