The Analysis and Solution of Current Differential Protection Maloperation for Transmission Line with High Series Compensation Degree

Zhenxing Li, Yuting Fu, Ling Wang, Lu Wang, Wenliang Bao and Yanxia Chen
Additional contact information
Zhenxing Li: College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, China
Yuting Fu: College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, China
Ling Wang: State Grid Yichang Electric Power Company, Yichang 443000, China
Lu Wang: College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, China
Wenliang Bao: College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, China
Yanxia Chen: Beijing Electric Power Research Institute, Beijing 100075, China

Energies, 2019, vol. 12, issue 9, 1-22

Abstract: With the increasing integration of huge-size generators and tighter interconnection among power grids, in internal fault, the fault current of Series Compensated (SC) lines may be reversed. At this time, the differential protection of SC lines may fail to operate due to insufficient sensitivity. In this research analyzes the reasons for the current reverse in SC lines and its effect on differential protection. The operation characteristics of differential protection are studied by focusing on multiple factors, including different series compensation degree, fault types, system operation mode, power angle difference, fault points, and transition resistance. An improved criterion based on the current amplitudes and phases on both sides of the series compensated lines is proposed. Further, to strengthen the operation characteristics of differential protection, the triple-fold line is chosen to improve the sensitivity for internal faults in this paper. The criterion is effective to improve the protection sensitivity of SC lines during internal fault. The PSCAD/EMTDC simulation and the power system dynamic physics simulation demonstrates that protection sensitivity is obviously increased in the improved scheme.

Keywords: series compensation device; current reverse; differential protection; sensitivity analysis (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/9/1639/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/9/1639/ (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:12:y:2019:i:9:p:1639-:d:227048

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 ().