Fault location of two-parallel transmission line for double phase-to-earth fault using one-terminal data.
An accurate algorithm for fault location of double phase-to-earth fault on transmission line of direct ground neutral system is presented. The algorithm, which employs the faulted phase network and zero-sequence network as fault-location model in which the source impedance at the remote end is not involved, effectively eliminates the effect of load flow and fault resistance on the accuracy of fault location. The algorithm achieves accurate location by measuring only one local end data and is used in a procedure that provides automatic determination of faulted types and phases, and does not require the engineer to specify them. Simulation results showed the effectiveness of the algorithm under the condition of double phase-to-earth fault.
Zhang
Qing-chao
QC
School of Electrical Engineering and Energy, Tianjin University, Tianjin 300072, China. qczhang@tju.edu.cn
Duan
Hui
H
Geng
Chao
C
Song
Wen-nan
WN
D000465:Algorithms; D017097:Electric Impedance; D004581:Electronics; D016571:Neural Networks, Computer; D012680:Sensitivity and Specificity