Finite Element Analysis on On-load Tap Changer (OLTC) Tap Selector Electrical Breakdown Mechanism Caused by Silver Sulphide Corrosion

An on-load tap changer (OLTC) is the main moving part of a power transformer, and is designed to maintain the voltage without interruption. OLTCs are experienced to many stresses during operation. Therefore, it is important to have an understanding on failures mechanisms to protect assets from catas...

Full description

Saved in:
Bibliographic Details
Main Authors: Samarasinghe, S., Naranpanawe, L., Martin, D., Me, H., Saha, T. K.
Format: Conference Proceeding
Language:English
Subjects:
Condition monitoring
finite element modeling (FEM)
On-load tap changer (OLTC)
Power transformer
Silver sulphide
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by
cites
container_end_page 5
container_issue
container_start_page 1
container_title
container_volume
creator Samarasinghe, S.
Naranpanawe, L.
Martin, D.
Me, H.
Saha, T. K.
description An on-load tap changer (OLTC) is the main moving part of a power transformer, and is designed to maintain the voltage without interruption. OLTCs are experienced to many stresses during operation. Therefore, it is important to have an understanding on failures mechanisms to protect assets from catastrophic failures. This paper discusses one particular failure mode taking place in an OLTC selector's switch, which is when the silver used to coat the contacts reacts with corrosive sulphur compounds dissolved in the insulating oil. As a result, a thin layer of silver sulphide is formed on the selector's contacts. Due to mechanical forces applied on this layer it flakes off and forms conductive particles suspended in the oil. Consequently, the dielectric strength of the oil can be reduced due to these particles, and the flashover can destroy the transformer. In this paper finite element modeling of a tap selector is used to study the impact of silver sulphide on the electric field in between tap selector contacts. Breakdown voltage test results are used to validate the simulation outputs.
doi_str_mv 10.1109/PESGM40551.2019.8973593
format conference_proceeding
fullrecord <record><control><sourceid>ieee_CHZPO</sourceid><recordid>TN_cdi_ieee_primary_8973593</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><ieee_id>8973593</ieee_id><sourcerecordid>8973593</sourcerecordid><originalsourceid>FETCH-LOGICAL-i203t-38deb506f64ff03b57281c38ad4fbfec062ac9358d55211e59a93e27bbb133483</originalsourceid><addsrcrecordid>eNotkM1OAjEcxKuJiYg8gQd71MNiP3e3R9wAmkAwWTyT7va_Ui1d0i4YHsD3FpS5TDLJb5IZhO4pGVJK1NPbuJzOBZGSDhmhapirjEvFL9ANzVhOqcopu0Q9qoRIlOL8Gg1i_CRHSZGlKeuhn4n1tgM8drAB3-GR1-4QbcStxwufuFYbvNRbXKy1_4CAHxazZfH4F5XgoO7acGLrLthaO_wcQH-Z9tvjOdRHxMYNLvQugsHVAZfW7Y8d5c5t19YALtoQ2mhbf4uuGu0iDM7eR--T8bJ4SWaL6WsxmiWWEd4lPDdQSZI2qWgawit5GlnzXBvRVA3UJGW6VlzmRkpGKUilFQeWVVVFORc576O7_14LAKttsBsdDqvza_wXANBipw</addsrcrecordid><sourcetype>Publisher</sourcetype><iscdi>true</iscdi><recordtype>conference_proceeding</recordtype></control><display><type>conference_proceeding</type><title>Finite Element Analysis on On-load Tap Changer (OLTC) Tap Selector Electrical Breakdown Mechanism Caused by Silver Sulphide Corrosion</title><source>IEEE Xplore All Conference Series</source><creator>Samarasinghe, S. ; Naranpanawe, L. ; Martin, D. ; Me, H. ; Saha, T. K.</creator><creatorcontrib>Samarasinghe, S. ; Naranpanawe, L. ; Martin, D. ; Me, H. ; Saha, T. K.</creatorcontrib><description>An on-load tap changer (OLTC) is the main moving part of a power transformer, and is designed to maintain the voltage without interruption. OLTCs are experienced to many stresses during operation. Therefore, it is important to have an understanding on failures mechanisms to protect assets from catastrophic failures. This paper discusses one particular failure mode taking place in an OLTC selector's switch, which is when the silver used to coat the contacts reacts with corrosive sulphur compounds dissolved in the insulating oil. As a result, a thin layer of silver sulphide is formed on the selector's contacts. Due to mechanical forces applied on this layer it flakes off and forms conductive particles suspended in the oil. Consequently, the dielectric strength of the oil can be reduced due to these particles, and the flashover can destroy the transformer. In this paper finite element modeling of a tap selector is used to study the impact of silver sulphide on the electric field in between tap selector contacts. Breakdown voltage test results are used to validate the simulation outputs.</description><identifier>EISSN: 1944-9933</identifier><identifier>EISBN: 1728119812</identifier><identifier>EISBN: 9781728119816</identifier><identifier>DOI: 10.1109/PESGM40551.2019.8973593</identifier><language>eng</language><publisher>IEEE</publisher><subject>Condition monitoring ; finite element modeling (FEM) ; On-load tap changer (OLTC) ; Power transformer ; Silver sulphide</subject><ispartof>2019 IEEE Power &amp; Energy Society General Meeting (PESGM), 2019, p.1-5</ispartof><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/8973593$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>309,310,780,784,789,790,23929,23930,25139,27924,54554,54931</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/8973593$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Samarasinghe, S.</creatorcontrib><creatorcontrib>Naranpanawe, L.</creatorcontrib><creatorcontrib>Martin, D.</creatorcontrib><creatorcontrib>Me, H.</creatorcontrib><creatorcontrib>Saha, T. K.</creatorcontrib><title>Finite Element Analysis on On-load Tap Changer (OLTC) Tap Selector Electrical Breakdown Mechanism Caused by Silver Sulphide Corrosion</title><title>2019 IEEE Power &amp; Energy Society General Meeting (PESGM)</title><addtitle>PESGM</addtitle><description>An on-load tap changer (OLTC) is the main moving part of a power transformer, and is designed to maintain the voltage without interruption. OLTCs are experienced to many stresses during operation. Therefore, it is important to have an understanding on failures mechanisms to protect assets from catastrophic failures. This paper discusses one particular failure mode taking place in an OLTC selector's switch, which is when the silver used to coat the contacts reacts with corrosive sulphur compounds dissolved in the insulating oil. As a result, a thin layer of silver sulphide is formed on the selector's contacts. Due to mechanical forces applied on this layer it flakes off and forms conductive particles suspended in the oil. Consequently, the dielectric strength of the oil can be reduced due to these particles, and the flashover can destroy the transformer. In this paper finite element modeling of a tap selector is used to study the impact of silver sulphide on the electric field in between tap selector contacts. Breakdown voltage test results are used to validate the simulation outputs.</description><subject>Condition monitoring</subject><subject>finite element modeling (FEM)</subject><subject>On-load tap changer (OLTC)</subject><subject>Power transformer</subject><subject>Silver sulphide</subject><issn>1944-9933</issn><isbn>1728119812</isbn><isbn>9781728119816</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>2019</creationdate><recordtype>conference_proceeding</recordtype><sourceid>6IE</sourceid><recordid>eNotkM1OAjEcxKuJiYg8gQd71MNiP3e3R9wAmkAwWTyT7va_Ui1d0i4YHsD3FpS5TDLJb5IZhO4pGVJK1NPbuJzOBZGSDhmhapirjEvFL9ANzVhOqcopu0Q9qoRIlOL8Gg1i_CRHSZGlKeuhn4n1tgM8drAB3-GR1-4QbcStxwufuFYbvNRbXKy1_4CAHxazZfH4F5XgoO7acGLrLthaO_wcQH-Z9tvjOdRHxMYNLvQugsHVAZfW7Y8d5c5t19YALtoQ2mhbf4uuGu0iDM7eR--T8bJ4SWaL6WsxmiWWEd4lPDdQSZI2qWgawit5GlnzXBvRVA3UJGW6VlzmRkpGKUilFQeWVVVFORc576O7_14LAKttsBsdDqvza_wXANBipw</recordid><startdate>201908</startdate><enddate>201908</enddate><creator>Samarasinghe, S.</creator><creator>Naranpanawe, L.</creator><creator>Martin, D.</creator><creator>Me, H.</creator><creator>Saha, T. K.</creator><general>IEEE</general><scope>6IE</scope><scope>6IH</scope><scope>CBEJK</scope><scope>RIE</scope><scope>RIO</scope></search><sort><creationdate>201908</creationdate><title>Finite Element Analysis on On-load Tap Changer (OLTC) Tap Selector Electrical Breakdown Mechanism Caused by Silver Sulphide Corrosion</title><author>Samarasinghe, S. ; Naranpanawe, L. ; Martin, D. ; Me, H. ; Saha, T. K.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i203t-38deb506f64ff03b57281c38ad4fbfec062ac9358d55211e59a93e27bbb133483</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Condition monitoring</topic><topic>finite element modeling (FEM)</topic><topic>On-load tap changer (OLTC)</topic><topic>Power transformer</topic><topic>Silver sulphide</topic><toplevel>online_resources</toplevel><creatorcontrib>Samarasinghe, S.</creatorcontrib><creatorcontrib>Naranpanawe, L.</creatorcontrib><creatorcontrib>Martin, D.</creatorcontrib><creatorcontrib>Me, H.</creatorcontrib><creatorcontrib>Saha, T. K.</creatorcontrib><collection>IEEE Electronic Library (IEL) Conference Proceedings</collection><collection>IEEE Proceedings Order Plan (POP) 1998-present by volume</collection><collection>IEEE Xplore All Conference Proceedings</collection><collection>IEEE Xplore</collection><collection>IEEE Proceedings Order Plans (POP) 1998-present</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Samarasinghe, S.</au><au>Naranpanawe, L.</au><au>Martin, D.</au><au>Me, H.</au><au>Saha, T. K.</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>Finite Element Analysis on On-load Tap Changer (OLTC) Tap Selector Electrical Breakdown Mechanism Caused by Silver Sulphide Corrosion</atitle><btitle>2019 IEEE Power &amp; Energy Society General Meeting (PESGM)</btitle><stitle>PESGM</stitle><date>2019-08</date><risdate>2019</risdate><spage>1</spage><epage>5</epage><pages>1-5</pages><eissn>1944-9933</eissn><eisbn>1728119812</eisbn><eisbn>9781728119816</eisbn><abstract>An on-load tap changer (OLTC) is the main moving part of a power transformer, and is designed to maintain the voltage without interruption. OLTCs are experienced to many stresses during operation. Therefore, it is important to have an understanding on failures mechanisms to protect assets from catastrophic failures. This paper discusses one particular failure mode taking place in an OLTC selector's switch, which is when the silver used to coat the contacts reacts with corrosive sulphur compounds dissolved in the insulating oil. As a result, a thin layer of silver sulphide is formed on the selector's contacts. Due to mechanical forces applied on this layer it flakes off and forms conductive particles suspended in the oil. Consequently, the dielectric strength of the oil can be reduced due to these particles, and the flashover can destroy the transformer. In this paper finite element modeling of a tap selector is used to study the impact of silver sulphide on the electric field in between tap selector contacts. Breakdown voltage test results are used to validate the simulation outputs.</abstract><pub>IEEE</pub><doi>10.1109/PESGM40551.2019.8973593</doi><tpages>5</tpages></addata></record>
fulltext fulltext_linktorsrc
identifier EISSN: 1944-9933
ispartof 2019 IEEE Power & Energy Society General Meeting (PESGM), 2019, p.1-5
issn 1944-9933
language eng
recordid cdi_ieee_primary_8973593
source IEEE Xplore All Conference Series
subjects Condition monitoring
finite element modeling (FEM)
On-load tap changer (OLTC)
Power transformer
Silver sulphide
title Finite Element Analysis on On-load Tap Changer (OLTC) Tap Selector Electrical Breakdown Mechanism Caused by Silver Sulphide Corrosion
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-09T02%3A58%3A24IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-ieee_CHZPO&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=proceeding&rft.atitle=Finite%20Element%20Analysis%20on%20On-load%20Tap%20Changer%20(OLTC)%20Tap%20Selector%20Electrical%20Breakdown%20Mechanism%20Caused%20by%20Silver%20Sulphide%20Corrosion&rft.btitle=2019%20IEEE%20Power%20&%20Energy%20Society%20General%20Meeting%20(PESGM)&rft.au=Samarasinghe,%20S.&rft.date=2019-08&rft.spage=1&rft.epage=5&rft.pages=1-5&rft.eissn=1944-9933&rft_id=info:doi/10.1109/PESGM40551.2019.8973593&rft.eisbn=1728119812&rft.eisbn_list=9781728119816&rft_dat=%3Cieee_CHZPO%3E8973593%3C/ieee_CHZPO%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-i203t-38deb506f64ff03b57281c38ad4fbfec062ac9358d55211e59a93e27bbb133483%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_id=info:pmid/&rft_ieee_id=8973593&rfr_iscdi=true