Title :
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
fDate :
10/1/2001 12:00:00 AM
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;
Journal_Title :
Power Delivery, IEEE Transactions on
