Electromagnetic Field Emission From Gas-to-Air Bushing in a GIS During Switching Operations
Very fast transient overvoltages (VFTO) and the associated very fast transient currents (VFTC) generated during switching operations in a gas-insulated substation (GIS) radiate electromagnetic (EM) fields, which in turn can leak into the external environment through apertures like SF 6 gas-to-air bu...
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| Veröffentlicht in: | IEEE transactions on electromagnetic compatibility 2007-05, Vol.49 (2), p.313-321 |
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| creator | Rao, M. Mohana Thomas, M. Joy Singh, B. P. |
| description | Very fast transient overvoltages (VFTO) and the associated very fast transient currents (VFTC) generated during switching operations in a gas-insulated substation (GIS) radiate electromagnetic (EM) fields, which in turn can leak into the external environment through apertures like SF 6 gas-to-air bushing. Therefore, it becomes necessary to characterize and quantify the EM fields when sensitive control devices are used for the operation of such substations. Keeping this in view, a numerical model using a finite-difference time-domain (FDTD) technique was developed to compute the transient field emission from a 245-kV-rated gas- to-air bushing. Shielding effectiveness (SE) of the bushing for these transient fields was evaluated using a derivative Gaussian current excitation of the high-tension (HT) conductor. The variation in EM field levels along the axis of bushing at various radial distances for different frequencies of the transient current were analyzed. The enhancement of the field levels due to the presence of a metallic structure on the ground plane, which simulates the control cubicle or the grounded enclosures of the GIS, were studied. Finally, the emission levels from different bushing models were calculated for the VFTC generated during a switching event, and the dominant frequencies were identified. |
| doi_str_mv | 10.1109/TEMC.2007.893334 |
| format | Article |
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Mohana ; Thomas, M. Joy ; Singh, B. P.</creator><creatorcontrib>Rao, M. Mohana ; Thomas, M. Joy ; Singh, B. P.</creatorcontrib><description>Very fast transient overvoltages (VFTO) and the associated very fast transient currents (VFTC) generated during switching operations in a gas-insulated substation (GIS) radiate electromagnetic (EM) fields, which in turn can leak into the external environment through apertures like SF 6 gas-to-air bushing. Therefore, it becomes necessary to characterize and quantify the EM fields when sensitive control devices are used for the operation of such substations. Keeping this in view, a numerical model using a finite-difference time-domain (FDTD) technique was developed to compute the transient field emission from a 245-kV-rated gas- to-air bushing. Shielding effectiveness (SE) of the bushing for these transient fields was evaluated using a derivative Gaussian current excitation of the high-tension (HT) conductor. The variation in EM field levels along the axis of bushing at various radial distances for different frequencies of the transient current were analyzed. The enhancement of the field levels due to the presence of a metallic structure on the ground plane, which simulates the control cubicle or the grounded enclosures of the GIS, were studied. Finally, the emission levels from different bushing models were calculated for the VFTC generated during a switching event, and the dominant frequencies were identified.</description><identifier>ISSN: 0018-9375</identifier><identifier>EISSN: 1558-187X</identifier><identifier>DOI: 10.1109/TEMC.2007.893334</identifier><identifier>CODEN: IEMCAE</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Applied sciences ; Bushings ; Computational modeling ; Conductors ; Connection and protection apparatus ; Electrical engineering. Electrical power engineering ; Electrical power engineering ; Electromagnetic interference (EMI) ; Electromagnetism ; Electronics ; Emission ; Exact sciences and technology ; Field emission ; finite-difference time-domain (FDTD) ; Gas insulation ; gas-insulated substation (GIS) ; Ground plane ; Insulators ; Mathematical models ; Power networks and lines ; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices ; Studies ; Substations ; Switches ; Switching ; Switching and signalling ; Systems, networks and services of telecommunications ; Telecommunications ; Telecommunications and information theory ; Time-domain analysis ; Transient analysis ; Transient current ; Vacuum microelectronics ; very fast transient currents (VFTCs) ; very fast transient overvoltages (VFTOs)</subject><ispartof>IEEE transactions on electromagnetic compatibility, 2007-05, Vol.49 (2), p.313-321</ispartof><rights>2007 INIST-CNRS</rights><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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Mohana</creatorcontrib><creatorcontrib>Thomas, M. Joy</creatorcontrib><creatorcontrib>Singh, B. P.</creatorcontrib><title>Electromagnetic Field Emission From Gas-to-Air Bushing in a GIS During Switching Operations</title><title>IEEE transactions on electromagnetic compatibility</title><addtitle>TEMC</addtitle><description>Very fast transient overvoltages (VFTO) and the associated very fast transient currents (VFTC) generated during switching operations in a gas-insulated substation (GIS) radiate electromagnetic (EM) fields, which in turn can leak into the external environment through apertures like SF 6 gas-to-air bushing. Therefore, it becomes necessary to characterize and quantify the EM fields when sensitive control devices are used for the operation of such substations. Keeping this in view, a numerical model using a finite-difference time-domain (FDTD) technique was developed to compute the transient field emission from a 245-kV-rated gas- to-air bushing. Shielding effectiveness (SE) of the bushing for these transient fields was evaluated using a derivative Gaussian current excitation of the high-tension (HT) conductor. The variation in EM field levels along the axis of bushing at various radial distances for different frequencies of the transient current were analyzed. The enhancement of the field levels due to the presence of a metallic structure on the ground plane, which simulates the control cubicle or the grounded enclosures of the GIS, were studied. Finally, the emission levels from different bushing models were calculated for the VFTC generated during a switching event, and the dominant frequencies were identified.</description><subject>Applied sciences</subject><subject>Bushings</subject><subject>Computational modeling</subject><subject>Conductors</subject><subject>Connection and protection apparatus</subject><subject>Electrical engineering. Electrical power engineering</subject><subject>Electrical power engineering</subject><subject>Electromagnetic interference (EMI)</subject><subject>Electromagnetism</subject><subject>Electronics</subject><subject>Emission</subject><subject>Exact sciences and technology</subject><subject>Field emission</subject><subject>finite-difference time-domain (FDTD)</subject><subject>Gas insulation</subject><subject>gas-insulated substation (GIS)</subject><subject>Ground plane</subject><subject>Insulators</subject><subject>Mathematical models</subject><subject>Power networks and lines</subject><subject>Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices</subject><subject>Studies</subject><subject>Substations</subject><subject>Switches</subject><subject>Switching</subject><subject>Switching and signalling</subject><subject>Systems, networks and services of telecommunications</subject><subject>Telecommunications</subject><subject>Telecommunications and information theory</subject><subject>Time-domain analysis</subject><subject>Transient analysis</subject><subject>Transient current</subject><subject>Vacuum microelectronics</subject><subject>very fast transient currents (VFTCs)</subject><subject>very fast transient overvoltages (VFTOs)</subject><issn>0018-9375</issn><issn>1558-187X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNp9kc1rGzEQxUVooG7SeyEXEUh6Wkdfu5KOjmu7gQQfnEIgB6HVziYy611H2qX0v6-2DinkkNPweL83zPAQ-kbJlFKir-4Xd_MpI0ROleaciyM0oXmuMqrkwyc0IYSqTHOZf0ZfYtwmKXLGJ-hx0YDrQ7ezTy303uGlh6bCi52P0XctXiYLr2zM-i6b-YCvh_js2yfsW2zx6maDfwxh1Jvfvnf_nPUegu1TNp6i49o2Eb6-zhP0a7m4n__Mbterm_nsNnNCsj6rK-JU7WomNBFcQslUqVhRM651CSC1yoUDppMsuFZaVZUWWoAupCxZVfIT9P2wdx-6lwFib9L1DprGttAN0SiZE041YYm8_JDkoiCi0CSB5-_AbTeENn1hVMEVS2fQBJED5EIXY4Da7IPf2fDHUGLGUsxYihlLMYdSUuTida-NzjZ1sK3z8X9OqVxLOXJnB84DwJstmBAFVfwv4QuTUQ</recordid><startdate>20070501</startdate><enddate>20070501</enddate><creator>Rao, M. Mohana</creator><creator>Thomas, M. Joy</creator><creator>Singh, B. P.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope><scope>F28</scope><scope>FR3</scope></search><sort><creationdate>20070501</creationdate><title>Electromagnetic Field Emission From Gas-to-Air Bushing in a GIS During Switching Operations</title><author>Rao, M. Mohana ; Thomas, M. Joy ; Singh, B. P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c472t-fd0c8fcf2490437eb28b826f2399bee79854ce29399639898dd9494e9677b2db3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Applied sciences</topic><topic>Bushings</topic><topic>Computational modeling</topic><topic>Conductors</topic><topic>Connection and protection apparatus</topic><topic>Electrical engineering. Electrical power engineering</topic><topic>Electrical power engineering</topic><topic>Electromagnetic interference (EMI)</topic><topic>Electromagnetism</topic><topic>Electronics</topic><topic>Emission</topic><topic>Exact sciences and technology</topic><topic>Field emission</topic><topic>finite-difference time-domain (FDTD)</topic><topic>Gas insulation</topic><topic>gas-insulated substation (GIS)</topic><topic>Ground plane</topic><topic>Insulators</topic><topic>Mathematical models</topic><topic>Power networks and lines</topic><topic>Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices</topic><topic>Studies</topic><topic>Substations</topic><topic>Switches</topic><topic>Switching</topic><topic>Switching and signalling</topic><topic>Systems, networks and services of telecommunications</topic><topic>Telecommunications</topic><topic>Telecommunications and information theory</topic><topic>Time-domain analysis</topic><topic>Transient analysis</topic><topic>Transient current</topic><topic>Vacuum microelectronics</topic><topic>very fast transient currents (VFTCs)</topic><topic>very fast transient overvoltages (VFTOs)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Rao, M. Mohana</creatorcontrib><creatorcontrib>Thomas, M. Joy</creatorcontrib><creatorcontrib>Singh, B. P.</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><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><jtitle>IEEE transactions on electromagnetic compatibility</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Rao, M. Mohana</au><au>Thomas, M. Joy</au><au>Singh, B. P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Electromagnetic Field Emission From Gas-to-Air Bushing in a GIS During Switching Operations</atitle><jtitle>IEEE transactions on electromagnetic compatibility</jtitle><stitle>TEMC</stitle><date>2007-05-01</date><risdate>2007</risdate><volume>49</volume><issue>2</issue><spage>313</spage><epage>321</epage><pages>313-321</pages><issn>0018-9375</issn><eissn>1558-187X</eissn><coden>IEMCAE</coden><abstract>Very fast transient overvoltages (VFTO) and the associated very fast transient currents (VFTC) generated during switching operations in a gas-insulated substation (GIS) radiate electromagnetic (EM) fields, which in turn can leak into the external environment through apertures like SF 6 gas-to-air bushing. Therefore, it becomes necessary to characterize and quantify the EM fields when sensitive control devices are used for the operation of such substations. Keeping this in view, a numerical model using a finite-difference time-domain (FDTD) technique was developed to compute the transient field emission from a 245-kV-rated gas- to-air bushing. Shielding effectiveness (SE) of the bushing for these transient fields was evaluated using a derivative Gaussian current excitation of the high-tension (HT) conductor. The variation in EM field levels along the axis of bushing at various radial distances for different frequencies of the transient current were analyzed. The enhancement of the field levels due to the presence of a metallic structure on the ground plane, which simulates the control cubicle or the grounded enclosures of the GIS, were studied. Finally, the emission levels from different bushing models were calculated for the VFTC generated during a switching event, and the dominant frequencies were identified.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TEMC.2007.893334</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Applied sciences Bushings Computational modeling Conductors Connection and protection apparatus Electrical engineering. Electrical power engineering Electrical power engineering Electromagnetic interference (EMI) Electromagnetism Electronics Emission Exact sciences and technology Field emission finite-difference time-domain (FDTD) Gas insulation gas-insulated substation (GIS) Ground plane Insulators Mathematical models Power networks and lines Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Studies Substations Switches Switching Switching and signalling Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory Time-domain analysis Transient analysis Transient current Vacuum microelectronics very fast transient currents (VFTCs) very fast transient overvoltages (VFTOs) |
| title | Electromagnetic Field Emission From Gas-to-Air Bushing in a GIS During Switching Operations |
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