Quick and Accurate Fault location in power distribution systems in the presence of DG units in military areas

The improvement in passive defense capabilities of electric power distribution network, especially in the critical sectors like, “no power outage” or “fast fault recovery” is highly important. Nowadays, distributed electric power generation (DG) systems especially in military areas are being increasingly used. In the event of an error, if the location of a fault is specified, the possibility of fast resolution of the fault will be enhanced in the network. In a power distribution network which includes some DG systems, conventional methods of fault location will not be accurate and proper. In order to retain system stability, fault location in electric power distribution network has been studied in this paper. The proposed method is based on impedance matrix of distribution network which has high accuracy and speed in fault location but not withstanding asymmetry in the network and load; the Simulink results has high accuracy. In this study, all the Simulink designs are worked out in openDSS software under different fault conditions and the results have been processed by MATLAB software.