Fault location index for distribution power system restoration using voltage sags

摘要

In distribution power systems, one of the main objectives is to ensure uninterrupted service. Accordingly, the fast identification and isolation of faults is a matter of major interest. This work proposes a fault location method applicable to any power distribution system, which considers a random number of nodes as measurement points. An index value based on the voltage sags generated by different fault types is calculated for each node; then, considering the current measurements on the network and a preexisting database value, it is possible to determine fault type and location. This approach is analyzed by means of IEEE 34 node test feeder, and the results show that the proposed method can efficiently detect fault type and fault location.