A Novel Single-Ended Fault Location Principle Based on the Differential Operator Approach

A novel single-ended fault location principle, which based on the differential operator approach, is proposed in this paper. Through the further study on distributed parameter telegraph equations, the energy of voltage difference, along the lines, shows the minimum value at the fault position during a finite time period. Hereby, a novel fault location function E(x) is established, which has the only minimum value at the fault point. Whilst, the E(x) obtained by real voltage value, and E₁(x) calculated from ostensible voltage have similar distribution trend. Hence, combined with fault location function, the fault can be accurately located by the minimum point of the voltage value, utilizing the single-ended fault data. The new fault location principle is proposed with the proofs of EMTP simulation tests.