Comparison of different current transformer modeling techniques for protection system studies

Author

Kojovic, Lj A.

Author_Institution

Cooper Power Syst., Franksville, WI, USA

Volume

3

fYear

2002

fDate

25-25 July 2002

Firstpage

1084

Abstract

If current transformer (CT) characteristics are not properly selected for fault conditions, saturation will occur and relays can have delayed response or even fail to trip. To verify that CT saturation will not cause mis-coordination with other protection devices a study needs to be performed, which requires CT modeling. This paper compares different CT computer modeling techniques. Models of a 1200/5 A CT were developed using electromagnetic transient type programs. Simulation results were compared against laboratory tests.

Keywords

current transformers; digital simulation; power engineering computing; power system protection; transient analysis; transient response; 1200 A; 5 A; computer modeling techniques; current transformer characteristics; delayed response; electromagnetic transient type programs; fault conditions; laboratory tests; miscoordination; protection devices; saturation; transient response; Circuit faults; Computational modeling; Current transformers; Delay; Electromagnetic modeling; Fault currents; Laboratories; Protection; Protective relaying; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Society Summer Meeting, 2002 IEEE

Conference_Location

Chicago, IL, USA

Print_ISBN

0-7803-7518-1

Type

conf

DOI

10.1109/PESS.2002.1043427

Filename

1043427