Adaptive Protection and Relay Coordination Approaches for Next Generation Electricity Networks

Abstract

Nowadays, microgrids composed of distributed generators including renewable energy sources have appeared as alternative to conventional electrical energy structure in terms of higher efficiency, reliability, sustainability, lower electrical losses and environmental pollution. However, one of the most significant obstacles that prevent the widespread application of microgrids is the insufficiency of conventional protection systems due to their variable and indefinite fault characteristics especially in islanding mode of operation. In the literature, there exist several solution proposals for this issue. However, when investigated; it is observed that there is a lack of a reliable, widely accepted and standard protection technique in the literature. In this concept, the protection and control issues in a smart grid system including different loads and several sources with distributed generation units have efficiently been realized in this thesis by employing smart controller.