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Analytical prediction of abnormal temporary overvoltages due to ground faults in MV networks
The paper deals with the temporary overvoltages that build up in radial MV distribution networks following the inception of a 1-phase-to-ground fault. It will be demonstrated that, for extended cable/overhead MV distribution networks with ungrounded neutral, in case of low resistance faults at criti...
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Published in: | Electric power systems research 2007-08, Vol.77 (10), p.1305-1313 |
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container_end_page | 1313 |
container_issue | 10 |
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container_title | Electric power systems research |
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creator | Gatta, F.M. Geri, A. Lauria, S. Maccioni, M. |
description | The paper deals with the temporary overvoltages that build up in radial MV distribution networks following the inception of a 1-phase-to-ground fault. It will be demonstrated that, for extended cable/overhead MV distribution networks with ungrounded neutral, in case of low resistance faults at critical locations along overhead lines, the neutral voltage can reach very large values, significantly higher than 1
p.u. (up to 2.5
p.u.). The attendant temporary overvoltages on healthy phases can be very large, much higher than √3
p.u. (up to 3.5
p.u.). Fault currents are also affected, reaching twice the value calculated with simplified methods, i.e. neglecting series impedances. Quick yet accurate analytical formulas for the prediction of maximum overvoltages, fault currents and critical fault distances are presented, together with their validation by detailed ATP-EMTP simulations. The results of a study on an existing Italian 15
kV–50
Hz extended mixed cable/overhead distribution network are finally presented and discussed. |
doi_str_mv | 10.1016/j.epsr.2006.09.023 |
format | article |
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p.u. (up to 2.5
p.u.). The attendant temporary overvoltages on healthy phases can be very large, much higher than √3
p.u. (up to 3.5
p.u.). Fault currents are also affected, reaching twice the value calculated with simplified methods, i.e. neglecting series impedances. Quick yet accurate analytical formulas for the prediction of maximum overvoltages, fault currents and critical fault distances are presented, together with their validation by detailed ATP-EMTP simulations. The results of a study on an existing Italian 15
kV–50
Hz extended mixed cable/overhead distribution network are finally presented and discussed.</description><identifier>ISSN: 0378-7796</identifier><identifier>EISSN: 1873-2046</identifier><identifier>DOI: 10.1016/j.epsr.2006.09.023</identifier><identifier>CODEN: EPSRDN</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>1-Phase-to-ground fault ; Applied sciences ; Electric connection. Cables. Wiring ; Electrical engineering. Electrical power engineering ; Electrical power engineering ; Exact sciences and technology ; Miscellaneous ; MV radial network ; Neutral grounding ; Overhead networks ; Power networks and lines ; Temporary overvoltages ; Testing. Reliability. Quality control ; Various equipment and components</subject><ispartof>Electric power systems research, 2007-08, Vol.77 (10), p.1305-1313</ispartof><rights>2006 Elsevier B.V.</rights><rights>2007 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c361t-2fef0efe228536e45c7b59ffa6a59c1e19f2ffd0f274fd9650e8e6cb717bc66d3</citedby><cites>FETCH-LOGICAL-c361t-2fef0efe228536e45c7b59ffa6a59c1e19f2ffd0f274fd9650e8e6cb717bc66d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=18822827$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Gatta, F.M.</creatorcontrib><creatorcontrib>Geri, A.</creatorcontrib><creatorcontrib>Lauria, S.</creatorcontrib><creatorcontrib>Maccioni, M.</creatorcontrib><title>Analytical prediction of abnormal temporary overvoltages due to ground faults in MV networks</title><title>Electric power systems research</title><description>The paper deals with the temporary overvoltages that build up in radial MV distribution networks following the inception of a 1-phase-to-ground fault. It will be demonstrated that, for extended cable/overhead MV distribution networks with ungrounded neutral, in case of low resistance faults at critical locations along overhead lines, the neutral voltage can reach very large values, significantly higher than 1
p.u. (up to 2.5
p.u.). The attendant temporary overvoltages on healthy phases can be very large, much higher than √3
p.u. (up to 3.5
p.u.). Fault currents are also affected, reaching twice the value calculated with simplified methods, i.e. neglecting series impedances. Quick yet accurate analytical formulas for the prediction of maximum overvoltages, fault currents and critical fault distances are presented, together with their validation by detailed ATP-EMTP simulations. The results of a study on an existing Italian 15
kV–50
Hz extended mixed cable/overhead distribution network are finally presented and discussed.</description><subject>1-Phase-to-ground fault</subject><subject>Applied sciences</subject><subject>Electric connection. Cables. Wiring</subject><subject>Electrical engineering. Electrical power engineering</subject><subject>Electrical power engineering</subject><subject>Exact sciences and technology</subject><subject>Miscellaneous</subject><subject>MV radial network</subject><subject>Neutral grounding</subject><subject>Overhead networks</subject><subject>Power networks and lines</subject><subject>Temporary overvoltages</subject><subject>Testing. Reliability. Quality control</subject><subject>Various equipment and components</subject><issn>0378-7796</issn><issn>1873-2046</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNp9kEtrGzEURkVJII7TP5CVNs1uppJmRhpBN8E0D3DpJsmqIGTNVZA7liaSxsH_PjIOdNfVhcv57uMgdE1JTQnl37c1TCnWjBBeE1kT1nxBC9qLpmKk5WdoQRrRV0JIfoEuU9qSAkrRLdCfW6_HQ3ZGj3iKMDiTXfA4WKw3PsRdaWfYTSHqeMBhD3EfxqxfIeFhBpwDfo1h9gO2eh5zws7jXy_YQ34P8W-6QudWjwm-ftYler77-bR6qNa_7x9Xt-vKNJzmilmwBCww1ncNh7YzYtNJazXXnTQUqLTM2oFYJlo7SN4R6IGbjaBiYzgfmiW6Oc2dYnibIWW1c8nAOGoPYU6KtqRpZMsLyE6giSGlCFZN0e3Ka4oSdRSptuooUh1FKiJVEVlC3z6n61Q02ai9celfsu_L4UwU7seJg_Lq3kFUyTjwpkiNYLIagvvfmg_0covy</recordid><startdate>20070801</startdate><enddate>20070801</enddate><creator>Gatta, F.M.</creator><creator>Geri, A.</creator><creator>Lauria, S.</creator><creator>Maccioni, M.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope></search><sort><creationdate>20070801</creationdate><title>Analytical prediction of abnormal temporary overvoltages due to ground faults in MV networks</title><author>Gatta, F.M. ; Geri, A. ; Lauria, S. ; Maccioni, M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c361t-2fef0efe228536e45c7b59ffa6a59c1e19f2ffd0f274fd9650e8e6cb717bc66d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>1-Phase-to-ground fault</topic><topic>Applied sciences</topic><topic>Electric connection. Cables. Wiring</topic><topic>Electrical engineering. Electrical power engineering</topic><topic>Electrical power engineering</topic><topic>Exact sciences and technology</topic><topic>Miscellaneous</topic><topic>MV radial network</topic><topic>Neutral grounding</topic><topic>Overhead networks</topic><topic>Power networks and lines</topic><topic>Temporary overvoltages</topic><topic>Testing. Reliability. Quality control</topic><topic>Various equipment and components</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gatta, F.M.</creatorcontrib><creatorcontrib>Geri, A.</creatorcontrib><creatorcontrib>Lauria, S.</creatorcontrib><creatorcontrib>Maccioni, M.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><jtitle>Electric power systems research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gatta, F.M.</au><au>Geri, A.</au><au>Lauria, S.</au><au>Maccioni, M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Analytical prediction of abnormal temporary overvoltages due to ground faults in MV networks</atitle><jtitle>Electric power systems research</jtitle><date>2007-08-01</date><risdate>2007</risdate><volume>77</volume><issue>10</issue><spage>1305</spage><epage>1313</epage><pages>1305-1313</pages><issn>0378-7796</issn><eissn>1873-2046</eissn><coden>EPSRDN</coden><abstract>The paper deals with the temporary overvoltages that build up in radial MV distribution networks following the inception of a 1-phase-to-ground fault. It will be demonstrated that, for extended cable/overhead MV distribution networks with ungrounded neutral, in case of low resistance faults at critical locations along overhead lines, the neutral voltage can reach very large values, significantly higher than 1
p.u. (up to 2.5
p.u.). The attendant temporary overvoltages on healthy phases can be very large, much higher than √3
p.u. (up to 3.5
p.u.). Fault currents are also affected, reaching twice the value calculated with simplified methods, i.e. neglecting series impedances. Quick yet accurate analytical formulas for the prediction of maximum overvoltages, fault currents and critical fault distances are presented, together with their validation by detailed ATP-EMTP simulations. The results of a study on an existing Italian 15
kV–50
Hz extended mixed cable/overhead distribution network are finally presented and discussed.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.epsr.2006.09.023</doi><tpages>9</tpages></addata></record> |
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source | ScienceDirect Freedom Collection 2022-2024 |
subjects | 1-Phase-to-ground fault Applied sciences Electric connection. Cables. Wiring Electrical engineering. Electrical power engineering Electrical power engineering Exact sciences and technology Miscellaneous MV radial network Neutral grounding Overhead networks Power networks and lines Temporary overvoltages Testing. Reliability. Quality control Various equipment and components |
title | Analytical prediction of abnormal temporary overvoltages due to ground faults in MV networks |
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