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Article

Research on Differential Protection of Generator Based on New Braking Mode

1
School of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China
2
School of Electrical and Control Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
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School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
*
Author to whom correspondence should be addressed.
Academic Editor: José A.F.O. Correia
Energies 2021, 14(7), 1857; https://doi.org/10.3390/en14071857
Received: 5 March 2021 / Revised: 21 March 2021 / Accepted: 24 March 2021 / Published: 26 March 2021
(This article belongs to the Section A: Electrical Engineering)
In view of the difficulties in coordination between reliability and sensitivity of conventional generator differential protection, this paper presents a novel generator differential protection scheme based on a new braking method. On the basis of the mathematical model of the field-circuit coupling method and the electrical network cascade characteristics, the stator windings were combined and decoupled by the improved six-sequence component method to eliminate electromagnetic coupling between winding coils. In accordance with the basic characteristics of longitudinal impedance, the function of sub-item discrimination was realized. Numerous simulations and the up-to-date dynamic experiments showed that the proposed method has good state discrimination ability and can effectively resist the influence of current transformer saturation. Thus, it has an excellent prospect for engineering promotion. View Full-Text
Keywords: differential protection; generator protection; phase-to-phase fault; winding structure; longitudinal impedance differential protection; generator protection; phase-to-phase fault; winding structure; longitudinal impedance
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MDPI and ACS Style

Xia, J.; Li, S.; Gao, S.; Shao, W.; Song, G.; Chen, C. Research on Differential Protection of Generator Based on New Braking Mode. Energies 2021, 14, 1857. https://doi.org/10.3390/en14071857

AMA Style

Xia J, Li S, Gao S, Shao W, Song G, Chen C. Research on Differential Protection of Generator Based on New Braking Mode. Energies. 2021; 14(7):1857. https://doi.org/10.3390/en14071857

Chicago/Turabian Style

Xia, Jingde, Shaozhuo Li, Shuping Gao, Wenquan Shao, Guobing Song, and Changjiang Chen. 2021. "Research on Differential Protection of Generator Based on New Braking Mode" Energies 14, no. 7: 1857. https://doi.org/10.3390/en14071857

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