Research on Differential Protection of Generator Based on New Braking Mode

Jingde Xia, Shaozhuo Li, Shuping Gao, Wenquan Shao, Guobing Song and Changjiang Chen
Additional contact information
Jingde Xia: School of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China
Shaozhuo Li: School of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China
Shuping Gao: School of Electrical and Control Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
Wenquan Shao: School of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China
Guobing Song: School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Changjiang Chen: School of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China

Energies, 2021, vol. 14, issue 7, 1-16

Abstract: 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.

Keywords: differential protection; generator protection; phase-to-phase fault; winding structure; longitudinal impedance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/14/7/1857/pdf (application/pdf)
https://www.mdpi.com/1996-1073/14/7/1857/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:14:y:2021:i:7:p:1857-:d:525021

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().