Innovative protection system on distribution network

The paper describes an innovative method to implement the protection system of a distribution network foreseeing a closed-ring operation plant based on a Smart Grid architecture. A closed-ring operation scheme requires an entirely new protection system in terms of fault detector devices, components, data communication infrastructure and central control system. The installation remote terminal units in particular MV/LV substations, fault detector devices and circuit breakers enable to select rapidly a restricted part of network where the fault occurred.