A quantified resilience assessment approach for electrical power systems considering multiple transmission line outages

Disruptive events, such as natural disasters, terrorist attacks and improper operations, may result in multiple transmission line outage of power system. In order to evaluate their impacts on power system, the concept of resilience is introduced. On the basis of existing resilience assessment methods, this paper develops a series of quantified resilience assessment indices, consisting of both system-level indices and component-level indices, as well as relevant assessment approach. With the system-level indices, the overall resilience of power system can be estimated. Based on the component-level indices, weak points of the system can be identified. Accordingly, the corresponding improving schemes can be raised to enhance the resilience of the original system. Finally, the proposed approach is tested on the IEEE RTS-79 test system under different disruptive events, and then the optimal improving scheme of this test system is determined based on the obtained resilience indices.