Validated Transient Heat-Transfer Model for Underground Transformer in Rectangular Vault
A new thermal model for underground transformers is proposed in this paper. The model takes the following important characteristics of the transformer installation into account: rectangular shapes; coil and core arrangement; orientation-based convection models for air (vertical, horizontal-upward, a...
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| Veröffentlicht in: | IEEE transactions on power delivery 2013-07, Vol.28 (3), p.1770-1778 |
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| creator | Sandraz, Julien de Leon, F. Cultrera, J. |
| description | A new thermal model for underground transformers is proposed in this paper. The model takes the following important characteristics of the transformer installation into account: rectangular shapes; coil and core arrangement; orientation-based convection models for air (vertical, horizontal-upward, and horizontal-downward heat flows); and turbulent or laminar flow regime. The resulting coupled set of differential and algebraic nonlinear equations is solved simultaneously, providing a robust and fast solution that can help design transformers. The model has been validated against three transformers with different dimensions installed in different vaults with onsite measurements. The average absolute difference between the simulated and measured temperatures over several months is typically less than 4 ° C. A parameter sensitivity study shows the critical importance of the proper estimation of the full-load heat loss and the ambient soil temperature. |
| doi_str_mv | 10.1109/TPWRD.2013.2260183 |
| format | Article |
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The model takes the following important characteristics of the transformer installation into account: rectangular shapes; coil and core arrangement; orientation-based convection models for air (vertical, horizontal-upward, and horizontal-downward heat flows); and turbulent or laminar flow regime. The resulting coupled set of differential and algebraic nonlinear equations is solved simultaneously, providing a robust and fast solution that can help design transformers. The model has been validated against three transformers with different dimensions installed in different vaults with onsite measurements. The average absolute difference between the simulated and measured temperatures over several months is typically less than 4 ° C. A parameter sensitivity study shows the critical importance of the proper estimation of the full-load heat loss and the ambient soil temperature.</description><identifier>ISSN: 0885-8977</identifier><identifier>EISSN: 1937-4208</identifier><identifier>DOI: 10.1109/TPWRD.2013.2260183</identifier><identifier>CODEN: ITPDE5</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Applied sciences ; Atmospheric modeling ; Coils ; Distribution transformers ; Electrical engineering. 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The model takes the following important characteristics of the transformer installation into account: rectangular shapes; coil and core arrangement; orientation-based convection models for air (vertical, horizontal-upward, and horizontal-downward heat flows); and turbulent or laminar flow regime. The resulting coupled set of differential and algebraic nonlinear equations is solved simultaneously, providing a robust and fast solution that can help design transformers. The model has been validated against three transformers with different dimensions installed in different vaults with onsite measurements. The average absolute difference between the simulated and measured temperatures over several months is typically less than 4 ° C. A parameter sensitivity study shows the critical importance of the proper estimation of the full-load heat loss and the ambient soil temperature.</description><subject>Applied sciences</subject><subject>Atmospheric modeling</subject><subject>Coils</subject><subject>Distribution transformers</subject><subject>Electrical engineering. Electrical power engineering</subject><subject>Electrical power engineering</subject><subject>Exact sciences and technology</subject><subject>heat-transfer transients</subject><subject>Heating</subject><subject>Mathematical model</subject><subject>Oil insulation</subject><subject>Power networks and lines</subject><subject>predictive maintenance</subject><subject>Solids</subject><subject>Substations</subject><subject>Temperature measurement</subject><subject>thermal analysis</subject><subject>thermal circuit</subject><subject>Transformers and inductors</subject><issn>0885-8977</issn><issn>1937-4208</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kMtOwzAQRS0EEqXwA7DxhmWKH4mdWaJCKVIRqGoLu8ixx1VQmlR2uuDvSR_qyhrPuaOZQ8g9ZyPOGTwtvr7nLyPBuBwJoRjP5QUZcJA6SQXLL8mA5XmW5KD1NbmJ8ZcxljJgA_KzMnXlTIeOLoJpYoVNR6douuRQegz0o3VYU98GumwchnVod82J7j83PVE1dI62M816V5tAV2ZXd7fkyps64t3pHZLl5HUxniazz7f38fMssQJ0l6jSolLWgeZWuhQxK40TQiKiErpECZm1HFSGvhSpzZV2qdcCSm-VAgFySMRxrg1tjAF9sQ3VxoS_grNi76Y4uCn2boqTmz70eAxtTbSm9v0ttornpNCZZBzSnns4clW_z7mtMq4AQP4Dy0tvWg</recordid><startdate>20130701</startdate><enddate>20130701</enddate><creator>Sandraz, Julien</creator><creator>de Leon, F.</creator><creator>Cultrera, J.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20130701</creationdate><title>Validated Transient Heat-Transfer Model for Underground Transformer in Rectangular Vault</title><author>Sandraz, Julien ; de Leon, F. ; Cultrera, J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c297t-6bce66cd971c3d4ee5bad223eee627be395cc1965efb24c867d4f729bfc669293</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Applied sciences</topic><topic>Atmospheric modeling</topic><topic>Coils</topic><topic>Distribution transformers</topic><topic>Electrical engineering. Electrical power engineering</topic><topic>Electrical power engineering</topic><topic>Exact sciences and technology</topic><topic>heat-transfer transients</topic><topic>Heating</topic><topic>Mathematical model</topic><topic>Oil insulation</topic><topic>Power networks and lines</topic><topic>predictive maintenance</topic><topic>Solids</topic><topic>Substations</topic><topic>Temperature measurement</topic><topic>thermal analysis</topic><topic>thermal circuit</topic><topic>Transformers and inductors</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sandraz, Julien</creatorcontrib><creatorcontrib>de Leon, F.</creatorcontrib><creatorcontrib>Cultrera, J.</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>IEEE transactions on power delivery</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Sandraz, Julien</au><au>de Leon, F.</au><au>Cultrera, J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Validated Transient Heat-Transfer Model for Underground Transformer in Rectangular Vault</atitle><jtitle>IEEE transactions on power delivery</jtitle><stitle>TPWRD</stitle><date>2013-07-01</date><risdate>2013</risdate><volume>28</volume><issue>3</issue><spage>1770</spage><epage>1778</epage><pages>1770-1778</pages><issn>0885-8977</issn><eissn>1937-4208</eissn><coden>ITPDE5</coden><abstract>A new thermal model for underground transformers is proposed in this paper. The model takes the following important characteristics of the transformer installation into account: rectangular shapes; coil and core arrangement; orientation-based convection models for air (vertical, horizontal-upward, and horizontal-downward heat flows); and turbulent or laminar flow regime. The resulting coupled set of differential and algebraic nonlinear equations is solved simultaneously, providing a robust and fast solution that can help design transformers. The model has been validated against three transformers with different dimensions installed in different vaults with onsite measurements. The average absolute difference between the simulated and measured temperatures over several months is typically less than 4 ° C. A parameter sensitivity study shows the critical importance of the proper estimation of the full-load heat loss and the ambient soil temperature.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TPWRD.2013.2260183</doi><tpages>9</tpages></addata></record> |
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| subjects | Applied sciences Atmospheric modeling Coils Distribution transformers Electrical engineering. Electrical power engineering Electrical power engineering Exact sciences and technology heat-transfer transients Heating Mathematical model Oil insulation Power networks and lines predictive maintenance Solids Substations Temperature measurement thermal analysis thermal circuit Transformers and inductors |
| title | Validated Transient Heat-Transfer Model for Underground Transformer in Rectangular Vault |
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