DISTANCE PROTECTION AND FAULT LOCATION UTILIZING ONLY PHASE CURRENT PHASORS

Two numerical algorithms for fault location and distance protection wh ich use data from one end of transmission line are presented. Both alg orithms require only current signals as input data. Voltage signals ar e unnecessary for determining the unknown distance to the fault. The s olution for the most frequent phase to ground fault is presented. The algorithms are relatively simple and easy to be implemented in the on- line application. The algorithms allow for accurate calculation of the fault location irrespective of the fault resistance and load. To illu strate the features of the new algorithms, steady-state and dynamic te sts are presented.