Title :
Efficiency of admitance relays during faults with high fault resistance values in MV networks
Author :
Lorenc, J. ; Kwapisz, A. ; Musierowicz, K.
Author_Institution :
Poznah Univ. of Technol., Poznan
Abstract :
In this paper efficiency of the different types of the admittance criteria is described during faults with high value of the fault resistance. The two types of fault are considered: high- ohm resistance in the fault loop and unbalance of the phase load caused by discontinuity of the line feeder with simultaneous occurrence of the ground-fault located behind the gap. Values of the zero sequence signals of current and voltage during those types of faults are shown.
Keywords :
fault diagnosis; power system faults; power system relaying; MV Networks; admitance relays; fault loop; ground-fault; high fault resistance values; high- ohm resistance; line feeder; phase load; zero sequence signals; Admittance measurement; Current measurement; Earth; Electrical resistance measurement; Filters; Power system protection; Protective relaying; Radio frequency; Relays; Voltage; fault currents; industrial power system faults; overcurrent protection; power distribution faults; power distribution lines; power distribution protection; power system faults; power system reliability; protective relaying;
Conference_Titel :
Power Tech, 2005 IEEE Russia
Conference_Location :
St. Petersburg
Print_ISBN :
978-5-93208-034-4
Electronic_ISBN :
978-5-93208-034-4
DOI :
10.1109/PTC.2005.4524435
