An adaptive distance relaying strategy based on global network simulation

In this paper, a new method based on Global Network Simulation (GNS) approach for adaptive distance relaying is presented. The GNS approach uses Diakoptics and Large Change Sensitivity (LCS) concepts to perform the interconnected power systems analysis globally. The proposed method employs the decentralized nature of GNS short circuit analysis for calculation of relay settings of each sub‐network independently in the federal environment. Updating the relay settings of each utility in every power system conditions adaptively as well as meeting individual utilities' adopted coordination philosophies are great achievements of presented approach. No computational errors encountered in the proposed method since the applied concepts eliminates the usual needs for equivalent network or reduced models. The proposed approach is well fitted for nowadays restructured power industry requirements. The performance of the presented approach is examined using the IEEE 14 bus as a small tangible test system and a real version of huge interconnected network for practical purposes. The results compared with conventional approach.