Abstract
In order to better solve the problems of current cable-overhead hybrid lines that are affected by transition resistance, fault phase angle, and fault type in fault location, this paper proposes to use the zero-sequence current method to determine the large fault section first, and then according to the electromagnetic time reversal theory (EMTR) to realize the accurate location of faults in small sectionsa. A simulation model of a cable-overhead hybrid transmission line was established using ATP-EMTP, and the program was verified in MATLAB. The simulation results show that the method is not only not affected by the transition resistance and the phase angle of the fault, but also the type of fault has no effect on the results of the distance measurement, and it has higher positioning accuracy. With the allowable relative error, different types of faults can be accurately located.
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