The Effect of Tap Changer Coking and Pitting on Frequency Response Analysis Measurement of Transformer

S. Al-Ameri, Ahmed Allawy Alawady, Mohd Fairouz Mohd Yousof, Muhammad Saufi Kamarudin, H. Illias
{"title":"The Effect of Tap Changer Coking and Pitting on Frequency Response Analysis Measurement of Transformer","authors":"S. Al-Ameri, Ahmed Allawy Alawady, Mohd Fairouz Mohd Yousof, Muhammad Saufi Kamarudin, H. Illias","doi":"10.1109/ICPADM49635.2021.9493956","DOIUrl":null,"url":null,"abstract":"The tap changer in a power transformer plays a vital function in regulating the voltage. It has been reported that the tap changer contributes to a large percentage of failures in the power transformer. This paper investigates a faulty tap changer using the frequency response analysis (FRA) test. All measurement configurations in FRA were employed to verify the effectiveness in detecting the fault. The test configurations are the end-to-end open circuit, the end-to-end short circuit, the capacitive inter-winding, and the inductive inter-winding. The coking and pitting of the tap changer are fabricated in several pieces of copper. These pieces are installed on the transformer tap selector. The FRA measurement was then performed on an 11/ 0.433 kV, 500kVA transformer at normal and faulty conditions. The variation between the FRA measurements is then calculated using the correlation coefficient (CC). This study improves the understanding of the FRA method by exploring its ability to detect tap changer faults. It is realized that the FRA method is sensitive to the tap changer coking and pitting. The results show that the tap changer coking effect at low frequencies. The response drop in magnitude at low frequencies between 20 Hz and 2 kHz. For pitting, it shows the response shifting towards higher frequencies.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICPADM49635.2021.9493956","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1

Abstract

The tap changer in a power transformer plays a vital function in regulating the voltage. It has been reported that the tap changer contributes to a large percentage of failures in the power transformer. This paper investigates a faulty tap changer using the frequency response analysis (FRA) test. All measurement configurations in FRA were employed to verify the effectiveness in detecting the fault. The test configurations are the end-to-end open circuit, the end-to-end short circuit, the capacitive inter-winding, and the inductive inter-winding. The coking and pitting of the tap changer are fabricated in several pieces of copper. These pieces are installed on the transformer tap selector. The FRA measurement was then performed on an 11/ 0.433 kV, 500kVA transformer at normal and faulty conditions. The variation between the FRA measurements is then calculated using the correlation coefficient (CC). This study improves the understanding of the FRA method by exploring its ability to detect tap changer faults. It is realized that the FRA method is sensitive to the tap changer coking and pitting. The results show that the tap changer coking effect at low frequencies. The response drop in magnitude at low frequencies between 20 Hz and 2 kHz. For pitting, it shows the response shifting towards higher frequencies.
分接开关结焦和点蚀对变压器频响分析测量的影响
电力变压器中的分接开关在调节电压方面起着至关重要的作用。据报道,分接开关在电力变压器故障中占很大比例。本文利用频率响应分析(FRA)试验对故障分接开关进行了研究。采用FRA中的所有测量配置验证了故障检测的有效性。测试配置为端到端开路、端到端短路、容性间绕组和感性间绕组。分接开关的焦化和点蚀是由几块铜制成的。这些部件安装在变压器抽头选择器上。然后对11/ 0.433 kV, 500kVA变压器在正常和故障状态下进行FRA测量。然后使用相关系数(CC)计算FRA测量值之间的变化。本研究通过探索FRA方法检测分接开关故障的能力,提高了对FRA方法的理解。认识到FRA方法对分接开关结焦和点蚀很敏感。结果表明,分接开关在低频时有焦化作用。在20赫兹和2千赫之间的低频时,响应幅度下降。对于点蚀,它显示响应向更高频率移动。
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
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信