Title :
An Impedance-Based CT Saturation Detection Algorithm for Bus-Bar Differential Protection
Author :
Fernandez, Camino
Author_Institution :
Instuto de Investigacion Tecnol??gica, Universidad Pontificia Comillas, Madrid, Spain
fDate :
7/1/2001 12:00:00 AM
Abstract :
This paper presents an algorithm for current transformer (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 CT secondary current and bus-bar 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 bus-bar differential relay.
Keywords :
Circuit faults; Current measurement; Current transformers; Detection algorithms; Fault currents; Impedance measurement; Power measurement; Power system measurements; Power system protection; Power system relaying; CT saturation detection; bus-bar protection; source impedance measurement;
Journal_Title :
Power Engineering Review, IEEE
DOI :
10.1109/MPER.2001.4311475