Impact Assessment of DG in Radial Distribution Networks

Abstract

Integration of new energy sources in to existing grid may creates some major issues in the system, especially in protection co-ordination. This paper concentrate on the impact analysis of radial distribution network due to the insertion of Distributed Generation (DG). Different protection issues with DGs are focused here with co-ordinated radial power flow. A new methodology which reduces the effect of DG in protection coordination of the existing system is proposed. In this adaptive scheme, various protection co-ordination settings are provided in different locations of DG with different configurations of network. A portion of IEEE 13 node radial distribution test feeder is used to verify this proposed methodology. Electrical equivalent of 3 bus systems is also used for the analytical derivation of key parameters under faulted condition.