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A novel fault location method for electrical distribution systems based on characteristic frequencies

Jinrui Tang, Xianggen Yin


This paper proposes a novel fault location method for electrical distribution systems based on characteristic frequencies, which uses solely the measured voltage transients without multi-recording nodes. Fault-generated traveling waves propagate along the distribution network and are reflected at the discontinuity points, so the recorded transients contain some characteristic frequencies associated with specific paths. Firstly, the recorded transients are analyzed by fast Fourier transform (FFT). Secondly, the sub-frequency bands are identified and the energy values of all sub-frequency bands are figured out. Then the fault position can be located based on the energy values. PSCAD/EMTDC and MATLAB are used for the simulation validation work and the sensitivity and the influencing factors of this method are analyzed. The simulation results have proved the effectiveness of the method.


Characteristic frequencies, distribution systems, fault location, Fast Fourier transform, traveling wave.

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