Title :
Performance of restricted earth fault protection scheme in the presence of current transformer remanence
Author :
Jalil, Kamarul Jalal Abdul ; Abu Bakar, Ab Halim ; Mahadi, Wan Norliza Wan ; Hani, Faridah ; Salleh, Mohamed
Author_Institution :
Univ. of Malaya, Kuala Lumpur
Abstract :
In modern power system protection, an accurate transformation of primary short circuit current is vital to ensure correct operation of the high impedance Restricted Earth Fault (REF) protection scheme used for transformer protection. The dc component in the fault current as well as the remanent flux cans causes severe saturation conditions if the current transformer is not selected correctly. Behavior of the current transformer during the transient condition is important as this will determine the stability of the REF protection scheme. This paper discusses how the remanence phenomenon beside the dc component in the fault current can causes severe saturation to the current transformer and affects the stability of the REF protection scheme.
Keywords :
fault currents; power system faults; power system protection; power transformers; current transformer remanence; fault current; high impedance restricted earth fault protection scheme; modern power system protection; primary short circuit current; transformer protection; Circuit faults; Current transformers; Earth; Fault currents; Impedance; Power system protection; Power system transients; Remanence; Short circuit currents; Stability; Current Transformer; power system protection;
Conference_Titel :
Power and Energy Conference, 2008. PECon 2008. IEEE 2nd International
Conference_Location :
Johor Bahru
Print_ISBN :
978-1-4244-2404-7
Electronic_ISBN :
978-1-4244-2405-4
DOI :
10.1109/PECON.2008.4762536