计及输电介数及功率介数的电网待恢复区域重要性评估

电力系统因自然灾害引发大规模故障时，对电网待恢复区域进行重要性评估对于电网恢复策略的制定具有重要意义。针对已有评估模型中介数指标的不足，将复杂网络的共性与电网络的电气特性相结合，综合考虑线路介数和输电线路的最大输电能力，提出了输电介数的概念，并以输电介数作为电网络边权重求解节点网络凝聚度。最后结合各待恢复区域内发电机和负荷的功率特性，用节点功率介数对节点网络凝聚度指标进行修正，得出评估待恢复区域的重要性指标，从而确定了待恢复区域的物资需求优先级，给电力应急体系的物资调度提供参考。最后，以IEEE标准系统为例进行仿真分析，验证了所提方法的可行性和适用性。

Importance evaluation of electric power areas to be restored considering electricity transmission betweenness and power betweenness

When faults in the large scale power systems are triggered by natural disaster, it is necessary to assess the importance of areas which need to be restored for developing restoration strategies. Due to the shortcoming of betweenness indices for the existing evaluation model, the concept of electricity transmission betweenness is proposed, combining what the complex networks have in common and the electrical characteristics of electrical network and considering the betweenness and the maximum transmission capacity of transmission lines. And then, network condensation degree of each area to be restored is calculated. According to the power characteristics of the generators and loads, the node power betweenness is used to correct the network aggregation index, and the priority, as well as importance index, of the area to be restored is obtained, which can be used as a reference for emergency dispatching system of power supplies. Finally, a simulation based on standard IEEE system is implemented to verify the feasibility and applicability of the proposed method.