Method to Eliminate Flux Linkage DC Component in Load Transformer for Static Transfer Switch
Many industrial and commercial sensitive loads are subject to the voltage sags and interruptions. The static transfer switch (STS) based on the thyristors is applied to improve the power quality and reliability. However, the transfer will result in severe inrush current in the load transformer, beca...
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| Published in | TheScientificWorld Vol. 2014; no. 2014; pp. 1 - 10 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
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Cairo, Egypt
Hindawi Publishing Corporation
01.01.2014
John Wiley & Sons, Inc Wiley |
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| Abstract | Many industrial and commercial sensitive loads are subject to the voltage sags and interruptions. The static transfer switch (STS) based on the thyristors is applied to improve the power quality and reliability. However, the transfer will result in severe inrush current in the load transformer, because of the DC component in the magnetic flux generated in the transfer process. The inrush current which is always 2~30 p.u. can cause the disoperation of relay protective devices and bring potential damage to the transformer. The way to eliminate the DC component is to transfer the related phases when the residual flux linkage of the load transformer and the prospective flux linkage of the alternate source are equal. This paper analyzes how the flux linkage of each winding in the load transformer changes in the transfer process. Based on the residual flux linkage when the preferred source is completely disconnected, the method to calculate the proper time point to close each phase of the alternate source is developed. Simulation and laboratory experiments results are presented to show the effectiveness of the transfer method. |
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| AbstractList | Many industrial and commercial sensitive loads are subject to the voltage sags and interruptions. The static transfer switch (STS) based on the thyristors is applied to improve the power quality and reliability. However, the transfer will result in severe inrush current in the load transformer, because of the DC component in the magnetic flux generated in the transfer process. The inrush current which is always 2~30 p.u. can cause the disoperation of relay protective devices and bring potential damage to the transformer. The way to eliminate the DC component is to transfer the related phases when the residual flux linkage of the load transformer and the prospective flux linkage of the alternate source are equal. This paper analyzes how the flux linkage of each winding in the load transformer changes in the transfer process. Based on the residual flux linkage when the preferred source is completely disconnected, the method to calculate the proper time point to close each phase of the alternate source is developed. Simulation and laboratory experiments results are presented to show the effectiveness of the transfer method. Many industrial and commercial sensitive loads are subject to the voltage sags and interruptions. The static transfer switch (STS) based on the thyristors is applied to improve the power quality and reliability. However, the transfer will result in severe inrush current in the load transformer, because of the DC component in the magnetic flux generated in the transfer process. The inrush current which is always 2 ~ 30 p.u. can cause the disoperation of relay protective devices and bring potential damage to the transformer. The way to eliminate the DC component is to transfer the related phases when the residual flux linkage of the load transformer and the prospective flux linkage of the alternate source are equal. This paper analyzes how the flux linkage of each winding in the load transformer changes in the transfer process. Based on the residual flux linkage when the preferred source is completely disconnected, the method to calculate the proper time point to close each phase of the alternate source is developed. Simulation and laboratory experiments results are presented to show the effectiveness of the transfer method.Many industrial and commercial sensitive loads are subject to the voltage sags and interruptions. The static transfer switch (STS) based on the thyristors is applied to improve the power quality and reliability. However, the transfer will result in severe inrush current in the load transformer, because of the DC component in the magnetic flux generated in the transfer process. The inrush current which is always 2 ~ 30 p.u. can cause the disoperation of relay protective devices and bring potential damage to the transformer. The way to eliminate the DC component is to transfer the related phases when the residual flux linkage of the load transformer and the prospective flux linkage of the alternate source are equal. This paper analyzes how the flux linkage of each winding in the load transformer changes in the transfer process. Based on the residual flux linkage when the preferred source is completely disconnected, the method to calculate the proper time point to close each phase of the alternate source is developed. Simulation and laboratory experiments results are presented to show the effectiveness of the transfer method. |
| Author | Lu, Jiming Wang, Dan Mao, Chengxiong He, Yu Tian, Bing |
| AuthorAffiliation | State Key Laboratory of Advanced Electromagnetic and Technology, Huazhong University of Science and Technology, Wuhan 430074, China |
| AuthorAffiliation_xml | – name: State Key Laboratory of Advanced Electromagnetic and Technology, Huazhong University of Science and Technology, Wuhan 430074, China |
| Author_xml | – sequence: 1 fullname: Wang, Dan – sequence: 2 fullname: Lu, Jiming – sequence: 3 fullname: Mao, Chengxiong – sequence: 4 fullname: He, Yu – sequence: 5 fullname: Tian, Bing |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/25133255$$D View this record in MEDLINE/PubMed |
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| Cites_doi | 10.1109/TPWRD.2011.2174162 10.1109/TPEL.2007.904186 10.1109/61.915496 10.1109/61.974207 10.1109/61.956762 10.1109/TIA.2008.926311 10.1109/TPWRD.2006.883004 10.1109/TPWRD.2003.817750 10.1109/TPEL.2005.869756 10.1109/61.915495 10.1109/TPWRD.2003.817790 10.1109/TPWRD.2006.881450 10.1109/TPWRD.2010.2045772 10.1109/TPWRD.2004.833910 10.1109/TIE.2013.2238872 |
| ContentType | Journal Article |
| Copyright | Copyright © 2014 Yu He et al. Copyright © 2014 Yu He et al. Yu He et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright © 2014 Yu He et al. 2014 |
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| References | (5) 2001; 16 (7) 2008; 44 Schwartzenberg J. W. De Doncker W. R. 15 kV medium voltage static transfer switch 3 Proceedings of the Conference Record of the 30th IEEE IAS Annual Meeting (IAS '95) 1995 Orlando, Fla, USA 2515 2520 (9) 2013; 60 (12) 2007; 22 (3) 2006; 21 (10) 2003; 18 (14) 2001; 16 (15) 2005; 20 Mazumdar J. Application of transfer switch in mining converters Proceedings of the IEEE Industry Applications Society Annual Meeting (IAS '10) 2010 Houston, Tex, USA 1 5 (16) 2007; 22 (2) 2003; 18 (17) 2010; 25 (8) 2007; 22 (13) 2001; 16 (18) 2012; 27 Cheng P.-T. Chen Y.-H. An in-rush current suppression technique solid-state transfer switch system Proceedings of the Power Conversion Conference 2007 1698 1705 (4) 2002; 17 13 15 16 17 18 19 2 3 4 7 8 9 10 |
| References_xml | – volume: 22 start-page: 1125 issue: 2 year: 2007 end-page: 1131 ident: 8 article-title: Effect of source phase difference on static transfer switch performance – volume: 16 start-page: 276 year: 2001 end-page: 280 ident: 13 article-title: Elimination of transformer inrush currentsby controlled switching—part I: theoretical considerations – volume: 20 start-page: 1683 issue: 2 year: 2005 end-page: 1691 ident: 15 article-title: Symmetrical and unsymmetrical voltage sag effects on three-phase transformers – volume: 22 start-page: 208 issue: 1 year: 2007 end-page: 216 ident: 12 article-title: A sequential phase energization method for transformer inrush current reduction-transient performance and practical considerations – reference: Schwartzenberg J. W. De Doncker W. R. 15 kV medium voltage static transfer switch 3 Proceedings of the Conference Record of the 30th IEEE IAS Annual Meeting (IAS '95) 1995 Orlando, Fla, USA 2515 2520 – volume: 21 start-page: 450 issue: 2 year: 2006 end-page: 458 ident: 3 article-title: Solid-state circuit breaker based on active thyristor topologies – volume: 18 start-page: 1342 issue: 4 year: 2003 end-page: 1349 ident: 10 article-title: Transient behavior of load transformer during subcycle bus transfer – volume: 17 start-page: 190 issue: 1 year: 2002 end-page: 199 ident: 4 article-title: Analysis of a static transfer switch with respect to transfer time – reference: Cheng P.-T. Chen Y.-H. An in-rush current suppression technique solid-state transfer switch system Proceedings of the Power Conversion Conference 2007 1698 1705 – volume: 16 start-page: 724 issue: 4 year: 2001 end-page: 731 ident: 5 article-title: Benchmark systems for digital computer simulation of a static transfer switch – volume: 22 start-page: 1890 issue: 5 year: 2007 end-page: 1899 ident: 16 article-title: A transformer inrush mitigation method for series voltage sag compensators – volume: 27 start-page: 245 issue: 1 year: 2012 end-page: 252 ident: 18 article-title: Single-phase transformer inrush current reduction using prefluxing – volume: 25 start-page: 2609 issue: 4 year: 2010 end-page: 2616 ident: 17 article-title: Novel approach for reducing transformer inrush currents: Laboratory measurements, analytical interpretation and simulation studies – volume: 18 start-page: 1442 issue: 4 year: 2003 end-page: 1449 ident: 2 article-title: A detailed model for a thyristor-based static transfer switch – volume: 44 start-page: 1249 issue: 4 year: 2008 end-page: 1258 ident: 7 article-title: Design of an impulse commutation bridge for the solid-state transfer switch – reference: Mazumdar J. Application of transfer switch in mining converters Proceedings of the IEEE Industry Applications Society Annual Meeting (IAS '10) 2010 Houston, Tex, USA 1 5 – volume: 16 start-page: 281 issue: 2 year: 2001 end-page: 285 ident: 14 article-title: Elimination of transformer inrush currents by controlled switching—part II: application and performance considerations – volume: 60 start-page: 5422 issue: 12 year: 2013 end-page: 5435 ident: 9 article-title: 400 V/1000 kVA hybrid automatic transfer switch – ident: 19 doi: 10.1109/TPWRD.2011.2174162 – ident: 17 doi: 10.1109/TPEL.2007.904186 – ident: 15 doi: 10.1109/61.915496 – ident: 4 doi: 10.1109/61.974207 – volume: 16 start-page: 724 issue: 4 year: 2001 ident: 5 publication-title: IEEE Transactions on Power Delivery doi: 10.1109/61.956762 – ident: 7 doi: 10.1109/TIA.2008.926311 – ident: 8 doi: 10.1109/TPWRD.2006.883004 – ident: 10 doi: 10.1109/TPWRD.2003.817750 – ident: 3 doi: 10.1109/TPEL.2005.869756 – volume: 16 start-page: 276 year: 2001 ident: 14 publication-title: IEEE Transactions on Power Delivery doi: 10.1109/61.915495 – ident: 2 doi: 10.1109/TPWRD.2003.817790 – ident: 13 doi: 10.1109/TPWRD.2006.881450 – ident: 18 doi: 10.1109/TPWRD.2010.2045772 – ident: 16 doi: 10.1109/TPWRD.2004.833910 – ident: 9 doi: 10.1109/TIE.2013.2238872 |
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| Snippet | Many industrial and commercial sensitive loads are subject to the voltage sags and interruptions. The static transfer switch (STS) based on the thyristors is... |
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| SubjectTerms | Circuit protection Electronics - instrumentation Electronics - methods Experiments Fluctuations Laboratories |
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| Title | Method to Eliminate Flux Linkage DC Component in Load Transformer for Static Transfer Switch |
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