Reviewing the impacts of distributed generation on distribution system protection

Interconnection of distributed generation (DG) on a radial distribution system presents situations not normally encountered by the distribution engineer. The author's intent is to point out some of the more common problems and the resulting misapplication of protection schemes incurred with the installation of DG. This paper discusses the impacts of DG on system protection and coordination particularly in cases where DG is added to a distribution feeder with existing line reclosers and fuses.