New scheme for transformer protection

Author

Chen, Songlin ; Li, Haiying ; Li, Jiuhu ; Zheng, Yuping ; Shen, Guorong

Author_Institution

Nanjing Autom. Res. Inst., China

Volume

1

fYear

2002

fDate

13-17 Oct 2002

Firstpage

246

Abstract

This paper deals with the new scheme of transformer protection. First, reviews and analyzes the problem of transformer protection, which includes magnetizing inrush, overexcitation, current transformer (CT) saturation, and the sensitivity of the differential relay. Then, the paper proposes a new scheme for transformer protection. Finally, the scheme was tested in a lab and real operation conditions of a power system. The results show that the relay never mal-operated and correctly identified all the faults that are applied.

Keywords

current transformers; fault diagnosis; power transmission protection; relay protection; testing; current transformer saturation; differential relay sensitivity; digital protective relay; fault identification; magnetizing inrush; overexcitation; power frequency component deviation; power systems; transformer protection; zero sequence percentage differential relay; Circuit faults; Current transformers; Fault currents; Magnetic analysis; Power system protection; Power system relaying; Protective relaying; Saturation magnetization; Surge protection; System testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Power System Technology, 2002. Proceedings. PowerCon 2002. International Conference on

Print_ISBN

0-7803-7459-2

Type

conf

DOI

10.1109/ICPST.2002.1053543

Filename

1053543