New Application Rules for Fuses in Low and Medium Voltage Grids having Distributed Generation

Abstract

The fuse is a well-established protective device which application in distribution systems (DG) need to be re-analyzed. Distribution systems having embedded DG introduce changes into the fault current and thus in the selective coordination studies. The emerging problems are presented, new methodologies and solutions are introduced. If none of the two methodologies possesses the required ability, then the application of more sophisticated protection devices should be analyzed. With this procedure the best solution from the technical and economic points of view could be obtained.