Characterising the d-axis machine model of a turbogenerator using finite elements
An analysis of a long established fundamental assumption is presented. The assumption that superposition is valid in frequency response derived models is shown to be wrong, because eddy current losses in the solid rotor cannot be superimposed in the machine direct-axis. This implies that network the...
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| Veröffentlicht in: | IEEE transactions on energy conversion 1999-09, Vol.14 (3), p.340-346 |
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| container_title | IEEE transactions on energy conversion |
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| creator | Arjona L., M.A. MacDonald, D.C. |
| description | An analysis of a long established fundamental assumption is presented. The assumption that superposition is valid in frequency response derived models is shown to be wrong, because eddy current losses in the solid rotor cannot be superimposed in the machine direct-axis. This implies that network theory is not valid in characterising the d-axis machine model. A machine model structure with one damper winding in the d-axis is derived from finite element analysis. Unequal mutual inductances in the machine d-axis are determined and hence the so-called differential leakage inductances are found and they are frequency dependent. The study is made on a 150 MVA turbine generator by simulating the standstill frequency response test with finite elements. |
| doi_str_mv | 10.1109/60.790880 |
| format | Article |
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The assumption that superposition is valid in frequency response derived models is shown to be wrong, because eddy current losses in the solid rotor cannot be superimposed in the machine direct-axis. This implies that network theory is not valid in characterising the d-axis machine model. A machine model structure with one damper winding in the d-axis is derived from finite element analysis. Unequal mutual inductances in the machine d-axis are determined and hence the so-called differential leakage inductances are found and they are frequency dependent. 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The assumption that superposition is valid in frequency response derived models is shown to be wrong, because eddy current losses in the solid rotor cannot be superimposed in the machine direct-axis. This implies that network theory is not valid in characterising the d-axis machine model. A machine model structure with one damper winding in the d-axis is derived from finite element analysis. Unequal mutual inductances in the machine d-axis are determined and hence the so-called differential leakage inductances are found and they are frequency dependent. The study is made on a 150 MVA turbine generator by simulating the standstill frequency response test with finite elements.</description><subject>Computer simulation</subject><subject>Damper windings</subject><subject>Damping</subject><subject>Eddy current testing</subject><subject>Eddy currents</subject><subject>Finite element method</subject><subject>Finite element methods</subject><subject>Frequency dependence</subject><subject>Frequency response</subject><subject>Machine windings</subject><subject>Mathematical analysis</subject><subject>Mathematical models</subject><subject>Shock absorbers</subject><subject>Solid modeling</subject><subject>Turbines</subject><subject>Turbogenerators</subject><issn>0885-8969</issn><issn>1558-0059</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo90E1LxDAQBuAgCq6rB6-echMPXSdtkyZHWfyCBRH0XJJ0so30Y01S0H_vahdPAzPPO4eXkEsGK8ZA3QpYVQqkhCOyYJzLDICrY7LYr3gmlVCn5CzGDwBW8pwtyOu61UHbhMFHP2xpapE2mf7ykfbatn5A2o8NdnR0VNM0BTNuccCg0xjo9BdxfvAJKXbY45DiOTlxuot4cZhL8v5w_7Z-yjYvj8_ru01m80qmjJVgeG6FakrDcu4KzqCB0iirmKmKpqhMJYQUvOEouVMccy0NlK7EwuqGFUtyPf_dhfFzwpjq3keLXacHHKdYK6YUKyoQe3kzSxvGGAO6ehd8r8N3zaD-ba0WUM-t7e3VbD0i_rvD8QcQ32dP</recordid><startdate>19990901</startdate><enddate>19990901</enddate><creator>Arjona L., M.A.</creator><creator>MacDonald, D.C.</creator><general>IEEE</general><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7TB</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>19990901</creationdate><title>Characterising the d-axis machine model of a turbogenerator using finite elements</title><author>Arjona L., M.A. ; MacDonald, D.C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c278t-140b52c69d4b125f3510d04b9c91b73d37b766865d5e85f95e2a8b04f4e3cad13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Computer simulation</topic><topic>Damper windings</topic><topic>Damping</topic><topic>Eddy current testing</topic><topic>Eddy currents</topic><topic>Finite element method</topic><topic>Finite element methods</topic><topic>Frequency dependence</topic><topic>Frequency response</topic><topic>Machine windings</topic><topic>Mathematical analysis</topic><topic>Mathematical models</topic><topic>Shock absorbers</topic><topic>Solid modeling</topic><topic>Turbines</topic><topic>Turbogenerators</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Arjona L., M.A.</creatorcontrib><creatorcontrib>MacDonald, D.C.</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>IEEE transactions on energy conversion</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Arjona L., M.A.</au><au>MacDonald, D.C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Characterising the d-axis machine model of a turbogenerator using finite elements</atitle><jtitle>IEEE transactions on energy conversion</jtitle><stitle>TEC</stitle><date>1999-09-01</date><risdate>1999</risdate><volume>14</volume><issue>3</issue><spage>340</spage><epage>346</epage><pages>340-346</pages><issn>0885-8969</issn><eissn>1558-0059</eissn><coden>ITCNE4</coden><abstract>An analysis of a long established fundamental assumption is presented. The assumption that superposition is valid in frequency response derived models is shown to be wrong, because eddy current losses in the solid rotor cannot be superimposed in the machine direct-axis. This implies that network theory is not valid in characterising the d-axis machine model. A machine model structure with one damper winding in the d-axis is derived from finite element analysis. Unequal mutual inductances in the machine d-axis are determined and hence the so-called differential leakage inductances are found and they are frequency dependent. The study is made on a 150 MVA turbine generator by simulating the standstill frequency response test with finite elements.</abstract><pub>IEEE</pub><doi>10.1109/60.790880</doi><tpages>7</tpages></addata></record> |
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| ispartof | IEEE transactions on energy conversion, 1999-09, Vol.14 (3), p.340-346 |
| issn | 0885-8969 1558-0059 |
| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Computer simulation Damper windings Damping Eddy current testing Eddy currents Finite element method Finite element methods Frequency dependence Frequency response Machine windings Mathematical analysis Mathematical models Shock absorbers Solid modeling Turbines Turbogenerators |
| title | Characterising the d-axis machine model of a turbogenerator using finite elements |
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