面向突发事件的电网韧性能力评价及构建方法

近年来,我国对电力系统面对突发事件时的性能表现提出了更为严格的要求,利用韧性的概念构建电网系统能够实现应急全周期内避免损失.文章利用应急管理理论分阶段刻画韧性的特征,在描述突发事件下电网韧性能力的同时提出了一种定量评价电网韧性的方法,它侧重于电网在突发事件发生后随着时间的推移维持稳定、抵抗中断、恢复性能的调整能力:利用给出的韧性评价指数结合电网特有的包括运行模式、组件物理强度和网络拓扑结构在内的电网特征,针对性地描述了能够增强电网韧性的措施.最后举例选取N-1准则措施利用PSCAD软件进行仿真模拟,利用韧性评价指数说明N-1措施能够增强电网韧性的同时,验证了韧性评价指数的合理性.电网实例引用IEEE14节点模型.

Method for assessing and constructing power system resilience under emergency events

In recent years, power grid systems are more and more expected to be a good performance in facing emergencies, and using the concept of resilience to construct power grid system can avoid losses in the whole emergency period. In this article, the characteristics of resilience are depicted in stages with the theory of emergency management, and a quantitative method for the assessment of system resilience is proposed. The method focuses on the ability of the system to maintain stability, resisting interruptions, and restore performance, based on the characteristic of power network which includes operation mode, component physical strength and network topological structure. The resilience evaluation metric is used to describe the measures which can enhance the resilience of power grid. Finally, the simulation is carried out by using PSCAD software, the N-1 criterion is selected as an example to prove the rationality of resilience metric. Meanwhile, the N-1 criterion has also been confirmed to enhance the resilience of the power grid system. This is illustrated using the IEEE14-bus test system.