Publisher : The Korean Institute of Electrical Engineers
DOI : 10.5370/JEET.2011.6.1.001
Title & Authors
A Robust Fault Location Algorithm for Single Line-to-ground Fault in Double-circuit Transmission Systems Zhang, Wen-Hao; Rosadi, Umar; Choi, Myeon-Song; Lee, Seung-Jae; Lim, Il-Hyung;
This paper proposes an enhanced noise robust algorithm for fault location on double-circuit transmission line for the case of single line-to-ground (SLG) fault, which uses distributed parameter line model that also considers the mutual coupling effect. The proposed algorithm requires the voltages and currents from single-terminal data only and does not require adjacent circuit current data. The fault distance can be simply determined by solving a second-order polynomial equation, which is achieved directly through the analysis of the circuit. The algorithm, which employs the faulted phase network and zero-sequence network with source impedance involved, effectively eliminates the effect of load flow and fault resistance on the accuracy of fault location. The proposed algorithm is tested using MATLAB/Simulink under different fault locations and shows high accuracy. The uncertainty of source impedance and the measurement errors are also included in the simulation and shows that the algorithm has high robustness.
Distribution factor;Fault location;Double circuit transmission line;Robustness;
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