Evolution of the streaming current generated by an oil flow through a pressboard-application to flow electrification in power transformers

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 1997-10-19 DOI:10.1109/CEIDP.1997.641168

E. Moreau, T. Paillat, G. Touchard

{"title":"Evolution of the streaming current generated by an oil flow through a pressboard-application to flow electrification in power transformers","authors":"E. Moreau, T. Paillat, G. Touchard","doi":"10.1109/CEIDP.1997.641168","DOIUrl":null,"url":null,"abstract":"In high power transformers, pressboard and oil are needed for electrical insulation. Added to that, the oil is using as a cooler fluid of the system. Furthermore, during this last decade, the phenomenon of flow electrification at the oil-pressboard interface region is suspected to be at the origin of several damages occurring in power transformers, as well in Europe, North America or Japan. Thus as these phenomena are strongly in correlation with the physico-chemical processes at the interface, the goal of this experimental study is to characterize the streaming current intensity in function of the electrochemical and morphological properties of the pressboard. For this, the streaming current and the mean space charge density generated by an oil flow through a non degraded pressboard and pressboards degraded by electrical discharges have been characterized. The results show that the electrochemical modifications of the oil-pressboard interface highly enhances the flow electrification of the oil.","PeriodicalId":176239,"journal":{"name":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"45 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1997-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/CEIDP.1997.641168","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 7

Abstract

In high power transformers, pressboard and oil are needed for electrical insulation. Added to that, the oil is using as a cooler fluid of the system. Furthermore, during this last decade, the phenomenon of flow electrification at the oil-pressboard interface region is suspected to be at the origin of several damages occurring in power transformers, as well in Europe, North America or Japan. Thus as these phenomena are strongly in correlation with the physico-chemical processes at the interface, the goal of this experimental study is to characterize the streaming current intensity in function of the electrochemical and morphological properties of the pressboard. For this, the streaming current and the mean space charge density generated by an oil flow through a non degraded pressboard and pressboards degraded by electrical discharges have been characterized. The results show that the electrochemical modifications of the oil-pressboard interface highly enhances the flow electrification of the oil.

查看原文本刊更多论文

油流通过压板产生的流动电流的演变——在电力变压器流动通电中的应用

在大功率变压器中，电绝缘需要压板和油。除此之外，油被用作系统的冷却液。此外，在过去十年中，油压板界面区域的流动带电现象被怀疑是电力变压器以及欧洲、北美或日本发生的几起损坏的根源。因此，由于这些现象与界面上的物理化学过程密切相关，本实验研究的目的是表征电流强度对压板电化学和形态特性的作用。为此，对油流通过未降解的压板和放电降解的压板产生的流电流和平均空间电荷密度进行了表征。结果表明，对油压界面进行电化学修饰后，油的流动起电性显著增强。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

自引率

0.00%

发文量