Adaptive Over-Current Protection for Distribution System with Distributed Generation

Abstract: The exponential growth of population has resulted a significant increase in power demand. Moreover the consumer area is vastly dispersed. Thus, the generation of electricity at the consumer side is gaining more popularity. The main problem associated with the generation of electricity at consumer side i.e. distributed generation is the failure of coordination between various protective devices employed in the system. Because after the integration of DG with the grid, the conventional radial distribution network is changed to interconnected mesh network. Therefore the existing protection system will not work satisfactorily in this case. This necessitates the modification of existing protection system or implementation of newer one. This paper recapitulates the impacts of DG on line losses, voltage profile, short circuit power levels of the network and presents a smart and adaptive methodology for protection of distribution network with distributed generation.

Keywords: distribution network, distributed generation, short circuit level, over-current protection.