A novel phase selector based on superimpose sequential components and correlation analysis is put forward in this paper. Multi-Base sequential systems are introduced to this phase selector. The phase selecting speed of this criterion may be faster than that of the criterion based on single-base sequential system and one-cycle fourier algorithm. The sensitivity of the single fault with high earth resistance and the phase-selecting reliability of phase-phase to ground fault all are improved in contrast to the phase selector using superimposed differential current between phases. Furthermore, the ATP simulations have verified the effectiveness of this scheme. In the end of this paper, the prospects of the correlation theory application to the protection relaying are expected.
Proceedings of the CSEE