A Resilience Evaluation Method Considering Power Source Ability and Network Topology of Power Systems

Power system resilience refers to the ability of power grid to withstand extreme events and to recover quickly from disturbances. Recently, most resilience evaluation methods are based on the topological structure of grid, while the impacts of power sources on resilience were not taken into consideration. By analogy power system resilience to the change progress of operating state under external force in mechanics, this article proposes a power system resilience evaluation method based on the power support ability of power sources and network topology. Taking high-voltage direct-current and battery energy storage as a typical power electronic-based power source, its capacity, regulation ability, and stability are, respectively, given as the characteristics of power source and are considered in the resilience evaluation process. The effectiveness of the proposed method is verified via the IEEE 39-bus system, the IEEE 14-bus system, as well as an actual power system in a province of China. The results prove that the proposed resilience evaluation method is more applicable for power system with multiple types of power sources. In addition, compared with other methods, the proposed method has higher accuracy for the impact of changes in topology and power distribution on system resilience.