Fault location algorithm for primary distribution feeders based on voltage sags

Abstract

Aiming at reaching the best quality in terms of supplying and services, some utilities are using more and more automation and instrumentation devices in its networks. Thus, in a new scenario, voltage sags are available from some additional measurements along the feeder by means of power quality or voltage measurement devices. In this work, a fault location algorithm, which uses voltage sag measurements, for primary distribution feeders is proposed. Preliminary tests performed on large-scale practical feeders using a generic load modeling show that the proposed algorithm is robust and suitable for carrying out fault location with improved accuracy.