A New Fault Type Identification Technique Based on Fault Generated High Frequency Transient Voltage Signals
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Faults on EHV/UHV overhead lines are in majority single-phase-to-ground arcing faults and are mostly temporary. It is quite evident that accurate and fast isolation of the faulty phase will improve the stability of the grid, so providing the facility of single pole reclosing is necessary. Traditional phase selectors can suffer some deficiencies in their performance due to varying system and fault conditions. This paper presents a novel technique based on the fault generated high frequency transient signals. A wide variety of generated data from the simulation of a typical 400-kV power system using ATP-EMTP were used to test the performance of the technique. The obtained results indicate that the proposed algorithm presents excellent performance.