An impedance-based CT saturation detection algorithm for busbar differential protection

Author

Fernández, Cesáreo

Author_Institution

Inst. de Invest. Tecnologica, Univ. Ponitificia Comillas, Madrid, Spain

Volume

16

Issue

4

fYear

2001

fDate

10/1/2001 12:00:00 AM

Firstpage

468

Lastpage

472

Abstract

This paper presents an algorithm for CT saturation detection based on the measurement of the power system source impedance seen at the relay location. The algorithm estimates this source impedance using a short-data window impedance-estimation algorithm and samples taken from the current transformer (CT) secondary current and busbar voltage. Following the changes on the impedance seen at the relay location, the algorithm is able to detect a CT saturation and send a blocking order to a fast tripping busbar differential relay

Keywords

busbars; current transformers; electric impedance; electric impedance measurement; power system measurement; power system protection; relay protection; blocking order; busbar differential protection; busbar voltage; current transformer saturation detection; fast tripping busbar differential relay; impedance-based CT saturation detection algorithm; power system source impedance; relay location; secondary current; short-data window impedance-estimation algorithm; source impedance estimation; Circuit faults; Current transformers; Detection algorithms; Fault currents; Fault detection; Impedance measurement; Power system modeling; Power system protection; Power system relaying; Protective relaying;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.956722

Filename

956722