A Distributed Fault-detecting Mechanism in Cyber-Physical Power System

Recently, to cope with resource and environment problems, quantities of new energy sources have been exploited. Many of them are connected to the power distribution network in the form of distributed generation (DG). With the promotion of permeability of DGs, the direction and amplitude of fault currents are dramatically influenced, making traditional protection unable to detect faults. Besides, with the development of cyber-physical systems(CPS), it is possible to gather more information to make comprehensive decisions to help detect a fault in power distribution network. This paper proposes a distributed fault-detecting mechanism in a CPS. Depending on the designed CPS structure, information of current and voltage from all nodes can be gathered in a subsystem. Furthermore, such information will be edge-computed, using the proposed algorithm and process of fault identification and location. Thus, varieties of fault can be effectively discovered and accurately located, in power distribution network with DGs.