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Studies on stator single-line-to-ground faults protection for a Powerformer considering the winding electromotive force distribution

Wang, Yuanyuan and Huang, Xiancheng and Zeng, Xiangjun and Liang, Jun and Chen, Xiaoqiao and Xu, Yao and Liu, Ying and Guo, Yongsheng and Kong, Yang (2020) Studies on stator single-line-to-ground faults protection for a Powerformer considering the winding electromotive force distribution. International Journal of Electrical Power and Energy Systems, 119 . Art. No. 105940. ISSN 0142-0615. https://resolver.caltech.edu/CaltechAUTHORS:20200304-091934133

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Abstract

The Powerformer is very different from a traditional generator in terms of the stator winding material, the winding process and the grid-connection schemes. Therefore, the electrical parameters of the stator winding and the distribution characteristics of the electrical fault component are considerably different from those of a conventional generator. If the traditional protection scheme of a generator is simply applied to a Powerformer, the reliability and sensitivity of the protection will be lowered. Therefore, this paper carefully analyzes the tooth width of a Powerformer, the flux density distribution of the tooth, and the distribution of the electromotive force (emf) between the segments of the winding. A distributed parameter model of a Powerformer is established by considering the emf distribution of the Powerformer windings. Accordingly, the zero-sequence fundamental voltage distribution caused by the emf distribution is analyzed. Then, a stator single-line-to-ground (SLG) relay protection scheme is proposed for the Powerformer. The scheme considers the influence of the emf distribution on the fault characteristics and improves the suitability of traditional zero-sequence fundamental voltage protection for the Powerformer. The simulation results show that the scheme has good sensitivity and reliability.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.ijepes.2020.105940DOIArticle
Additional Information:© 2020 Elsevier Ltd. Received 16 August 2019, Revised 7 February 2020, Accepted 12 February 2020, Available online 25 February 2020.
Funders:
Funding AgencyGrant Number
National Natural Science Foundation of China51777014
Hunan Provincial Key Research and Development ProgramCX2018B556
Educational Commission of Hunan Province of China2018GK2057
Changsha Science and Technology Project18A124
Hunan Graduate Research and Innovation ProjectKQ1901104
Record Number:CaltechAUTHORS:20200304-091934133
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200304-091934133
Official Citation:Yuanyuan Wang, Xiancheng Huang, Xiangjun Zeng, Jun Liang, Xiaoqiao Chen, Yao Xu, Ying Liu, Yongsheng Guo, Yang Kong, Studies on stator single-line-to-ground faults protection for a Powerformer considering the winding electromotive force distribution, International Journal of Electrical Power & Energy Systems, Volume 119, 2020, 105940, ISSN 0142-0615, https://doi.org/10.1016/j.ijepes.2020.105940. (http://www.sciencedirect.com/science/article/pii/S0142061519328686) Abstract: The Powerformer is very different from a traditional genera
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:101699
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:04 Mar 2020 18:05
Last Modified:04 Mar 2020 18:05

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