基于絕對法檢測變壓器套管在線監(jiān)測技術(shù)研究與典型應(yīng)用
王偉平
(廣東電網(wǎng)有限責(zé)任公司中山供電局,廣東 中山 528400)
摘 要:介紹了一種基于絕對法應(yīng)用于變壓器套管在線監(jiān)測實(shí)用技術(shù),闡述了在線監(jiān)測技術(shù)原理,并就現(xiàn)場應(yīng)用的關(guān)鍵技術(shù)提出了具體方案和建議。結(jié)合一起變壓器套管缺陷實(shí)例,通過建立等值電路簡化模型,并從理論計(jì)算上分析認(rèn)為由于主變110 kV側(cè)B相套管末屏滲油,滲油支路對在線監(jiān)測系統(tǒng)測量回路存在分流導(dǎo)致其介損數(shù)據(jù)出現(xiàn)異常,由此表明該項(xiàng)技術(shù)可作為停電預(yù)試檢測的補(bǔ)充,實(shí)時(shí)在線監(jiān)測變壓器套管絕緣狀況,提高設(shè)備安全運(yùn)行水平。
關(guān)鍵詞:套管;在線監(jiān)測;技術(shù)研究;典型應(yīng)用
中圖分類號:TM216 文獻(xiàn)標(biāo)識碼:A 文章編號:1007-3175(2020)01-0049-04
Research and Typical Application of On-Line Monitoring Technology for Transformer Bushing
Based on Absolute Method Detection
WANG Wei-ping
(Zhongshan Power Supply Bureau of Guangdong Power Grid Corp, Zhongshan 528400, China)
Abstract: Introduction was made to a kind of on-line monitoring operative technology, based on absolute method detection, applied to the transformer bushing.This paper expounded the principle of on-line monitoring technology and put forward specific plans and suggestions for the key technology of field application.Combining with an example of transformer bushing defect, this paper simplified a equivalent circuit model and theoretically analyzed that the dielectric loss data of on-line monitoring system was abnormal due to the oil leakage from the end shield of B-phase bushing on 11 0 kV side of the main transformer and the diversion of the oil leakage branch to the measuring circuit of the on-line monitoring system, which indicates that the technique can be used as a supplement for preventive testing to carry out real-time online monitoring of transformer bushing insulation, so as to improve the level of equipment safe operation.
Key words: bushing; on-line monitoring; technical study; typical application
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