A NOVEL PHASE SELECTOR BASED ON FAULT GENERATED HIGH FREQUENCY TRANSIENT VOLTAGE SIGNALS

Ground fault inception in power grids is imminent. Among these faults, single phase to ground faults contribute more than 90\%. 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.