Fault location of two-parallel transmission line for double phase-to-earth fault using one-terminal data |
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Authors: | Zhang Qing-chao Duan Hui Geng Chao Song Wen-nan |
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Institution: | (1) School of Electrical Engineering and Energy, Tianjin University, 300072 Tianjin, China |
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Abstract: | 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.
Project (No. 023801211) supported by the Key Science Foundation of Tianjin, China |
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Keywords: | Fault location Transmission line Double phase-to-earth fault |
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