基于子图同构的电力系统故障建模方法

Power System Fault Modeling Method Based on Subgraph Isomorphism

为了快速完备地建立电力系统在线与离线仿真分析所依赖的故障集,提出一种基于子图同构的电力系统故障建模方法。首先提出了能够完整描述电力系统故障的三要素:网络模式、事件集合和事件模式,并基于此对电力系统故障模型进行了统一的数学表达,再结合电力系统网络节点类型分布特点与节点语意信息完善了子图同构算法在故障网络模式匹配中的应用效果,最后通过一个规模较大的区域电网验证了所提方法的有效性。

To quickly and completely establish a power system fault set,which is indispensable for both the online and offline simulation analyses,a fault modeling method for power system based on subgraph isomorphism is proposed.First,three factors to completely depict the power system fault are given,i.e.,network pattern,event set and event pattern. On this basis,a general mathematical expression of fault modeling is formulated. Then,by combining the characteristics of node type distribution in the power system and the node semantics,the application effect of the subgraph isomorphism method on fault network pattern matching is improved. Finally,the effectiveness of the proposed method is verified by a large-scale regional power grid.