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...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2014-01-01
|
| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/724529 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849400268219744256 |
|---|---|
| author | Yu He Chengxiong Mao Jiming Lu Dan Wang Bing Tian |
| author_facet | Yu He Chengxiong Mao Jiming Lu Dan Wang Bing Tian |
| author_sort | Yu He |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-8fd8509b22aa41eaa3243755abed2da8 |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-8fd8509b22aa41eaa3243755abed2da82025-08-20T03:38:08ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/724529724529Method to Eliminate Flux Linkage DC Component in Load Transformer for Static Transfer SwitchYu He0Chengxiong Mao1Jiming Lu2Dan Wang3Bing Tian4State Key Laboratory of Advanced Electromagnetic and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaState Key Laboratory of Advanced Electromagnetic and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaState Key Laboratory of Advanced Electromagnetic and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaState Key Laboratory of Advanced Electromagnetic and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaState Key Laboratory of Advanced Electromagnetic and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaMany 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.http://dx.doi.org/10.1155/2014/724529 |
| spellingShingle | Yu He Chengxiong Mao Jiming Lu Dan Wang Bing Tian Method to Eliminate Flux Linkage DC Component in Load Transformer for Static Transfer Switch The Scientific World Journal |
| title | Method to Eliminate Flux Linkage DC Component in Load Transformer for Static Transfer Switch |
| title_full | Method to Eliminate Flux Linkage DC Component in Load Transformer for Static Transfer Switch |
| title_fullStr | Method to Eliminate Flux Linkage DC Component in Load Transformer for Static Transfer Switch |
| title_full_unstemmed | Method to Eliminate Flux Linkage DC Component in Load Transformer for Static Transfer Switch |
| title_short | Method to Eliminate Flux Linkage DC Component in Load Transformer for Static Transfer Switch |
| title_sort | method to eliminate flux linkage dc component in load transformer for static transfer switch |
| url | http://dx.doi.org/10.1155/2014/724529 |
| work_keys_str_mv | AT yuhe methodtoeliminatefluxlinkagedccomponentinloadtransformerforstatictransferswitch AT chengxiongmao methodtoeliminatefluxlinkagedccomponentinloadtransformerforstatictransferswitch AT jiminglu methodtoeliminatefluxlinkagedccomponentinloadtransformerforstatictransferswitch AT danwang methodtoeliminatefluxlinkagedccomponentinloadtransformerforstatictransferswitch AT bingtian methodtoeliminatefluxlinkagedccomponentinloadtransformerforstatictransferswitch |