Service Restoration in Distribution Network with Distributed Generation

This paper studies the influence of location and capacity sizing of distributed generation during service restoration. It is assumed that after the occurrence of fault at particular section of a distribution network, the loads get disconnected and are left unsupplied. Service should be restored to the affected loads through a network reconfiguration procedure. In this study, network reconfiguration was implemented using the TOPO application in the power system simulation programme for planning, design and analysis of distribution system (PSS/Adept). This application determines the optimal sectionalizing-tie switch pairs based on minimum losses configuration and at the same time, all nodes are assured for the supply. The location of the distributed generation was identified using the pre-determined sensitivity indices, while evolutionary programming was used to determine the size of the installed distributed generations. The proposed study was conducted on the IEEE 69 bus distribution system. The results show that installing distributed generation at the suitable location with appropriate sizing has able to provide lower loss level and higher voltage profile in fault condition as compared to that obtained when the network was installed with compensating capacitor.