Line contingency ranking based on detection of accidental islands for autonomous micro-grids

Abstract

Introduction of Distributed Generator(DG) units in conventional distribution systems results in restructuring of the system. DG units impact line losses, bus voltage profile and stability of the existing system. This paper focuses on accidental island detection during line contingencies. This has been attempted by tracing the change in the configuration of the autonomous micro-grids. A comparison is done for radial and weakly meshed structures based on the voltage profile, indices, line losses and transient stability of the DGs on implementation of the proposed algorithm. Ranking of line contingencies is done with the database of the detected islands. MATLAB coding is developed to validate the proposed algorithm & the standard 33-node radial distribution system is considered for justification of the same. © 2013 Springer-Verlag.