Fault decoupling device: a new device to reduce the impact of distributed generation on electrical distribution systems

Distributed generation will play an increasing role in the electric power system of the near future. The high penetration of DG in the next years represents a potential resource for the electric power system. On the other hand it brings about several problems concerning with distribution system planning, control and management. The aim of this paper is to analyze some operating conflicts due to the presence of synchronous and asynchronous generators directly connected to distribution networks. The work also proposes a possible solution, based on a new device defined as fault decoupling device (FDD). The principle of operation of this device has been presented and the capability has been proved by means of computer simulations.