A new fault location algorithm for distribution networks

The presented fault location algorithm for distribution networks is based on voltage and current phasor estimation. The algorithm was investigated and proved on the basis of voltage and current data obtained from versatile EMTP/ATP simulations. The developed algorithm utilizes the current measurements delivered from the faulty feeder or from the substation. In the latter case the estimation error depends on accuracy of pre-fault condition determination in the MV substation. The distance to fault estimation error depends on the accuracy of measurements as well as cable parameters. The evaluation by using EMTP/ATP simulation has proved the validity of the algorithm and gives accurate fault location estimation.