Backward-forward sweep-based islanding scenario generation algorithm for defensive splitting of radial distribution systems
This chapter proposes a novel two-stage scenario generation strategy for controlled or defensive islanding of smart distribution systems. In the first step, the primary line and bus data matrices have been determined with respect to deterministic and probabilistic nodes and branches for each island. In the second stage, line and bus information matrices can be updated for all islands in each generated scenario using node elimination matrices (NEMs). Backward-forward power flow is then solved in each island according to modified line and bus information matrices. In this study, binary imperialistic competitive algorithm (BICA) is used to find the best splitting points with the aim of minimizing total active power losses and nodal voltage deviations considering voltage limits and feeder capacity constraints. The proposed strategy is evaluated through an extensive test conducted on 12.66 kV, 33-bus radial distribution system with three DG units to validate the speed and the effectiveness of the developed algorithm.