Identification of Key Lines of Power Grid under Typhoon Disaster Based on Situation Awareness

Typhoon disaster may cause blackout. The key lines are closely related to the occurrence of blackout. It is of great significance for disaster prevention and mitigation to accurately identify the key lines under typhoon disaster. Based on the idea of situation awareness, the key lines in the power grid under typhoon disaster are identified by considering five situations, including line fault situation, defense situation, topology situation, operation situation and fault prone situation. By using the combination of subjective and objective AHP-entropy weight, the weight of each situation is reasonably determined. And the comprehensive situation of the line is determined. The key lines are identified according to the comprehensive situation of the line. The simulation results of IEEE 39-bus system under typhoon disaster show that the proposed method can identify the key lines in the power system under typhoon disaster reasonably and comprehensively.