Application of Multi-Agent and impedance-based algorithm for fault location in power distribution systems with DG

With more and more distributed generation (DG) connected in, the conventional distribution systems which are radical in nature become multi-source systems. The traditional fault location method is no longer adaptive. This paper proposed an effective fault location method based on Multi-Agent System (MAS) and the extended impedance-based fault-location algorithm in ineffectively grounded distribution systems with DG. To short-circuit faults, this method can locate the fault-association-setion firstly by MAS and then can deduce the fault distance using measurements at the sending-end and the synchronized output current of DGs. Simulation results have demonstrated that the proposed algorithm is accurate.