Abstract

A simple and fast method to identify the faulted conductors in a double circuit line with the help of a single circuit transient based fault type classifier is presented in this paper. In addition to a transient based single circuit fault type classifier, only currents locally measured through each conductor are required. Having known the fault type, the magnitudes of the rate of change of currents (ROCOC) through two circuits of faulted phases are compared by calculating three indices to find the conductors involved in the fault. The method can identify faulted conductors during both inter-circuit faults as well as intra-circuit faults. The method can be easily implemented on a simple hardware platform capable of performing filtering and simple mathematical functions. As only the current measurements in the frequency components between 0.5 kHz to 1 kHz are suggested, the need for high bandwidth current transducer is avoided.

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