Title :
Estimation of Fault Resistance Using Fault Record Data
Author :
Bing Xia ; Yang Wang ; Vazquez, Ernesto ; Wilsun Xu ; Wong, D. ; Tong, Michael
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, AB, Canada
Abstract :
Information about typical fault resistances of transmission lines will help improve the settings of distance relays. This paper proposes an offline method for estimating the fault resistance of transmission lines using the COMTRADE fault files available from digital distance relays. The proposed method uses the fault records at both ends of a line, but synchronization of the data sets is not required. Simulation and lab experimental results show that the estimated fault resistance has good accuracy with 2% average error. Finally, the method was applied to estimate the fault resistances of more than 50 phase-to-ground faults of a utility company. The ranges of fault resistance values are determined for faults on the company´s 240 kV and 138 kV lines.
Keywords :
fault diagnosis; power transmission faults; power transmission lines; COMTRADE; digital distance relay; fault record data; fault resistance estimation; offline method; synchronization; transmission line; voltage 138 kV; voltage 240 kV; Circuit faults; Computational modeling; Estimation; Power transmission lines; Resistance; Synchronization; Transmission line measurements; Distance protection; fault resistance; power system protection;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2014.2355041