A graphical Controlled Islanding method for Blackout prevention

This paper presents a graphical method for Controlled Islanding to prevent Blackout occurrence. This proposed method is proven to be effective by the obtained results. The proposed method is very simple in application and it depends on graphical methods. A weight index for the transmission lines which is the ratio between the absolute active power flowing in the line to the reactance of the line (|P|/X) is used in determination of islands. A load check and transfer within islands can be done in order to achieve minimum power imbalance. The proposed method is tested on IEEE-39 Bus New England. The results including rotor angles and frequency after separation are presented to show the effectiveness of the new proposed method. A table summarizing three-phase faults on every line on the IEEE-39 New England system with the required lines to be cut for each fault case based on the proposed method is presented in this paper. The used software in the simulation process is the power world simulator.