基于图论的集中式保护主后备保护区域划分?

Zone selection of primary and backup protection in centralized protection based on graph theory

数字化变电站已经广泛应用,但缺乏对集中式保护算法研究。针对这一空白,提出了一种基于图论知识的集中式保护自适应分区算法。该算法根据数字化变电站各设备状态信息及拓扑连接关系,形成实时顶点-边邻接矩阵,在线修正变电站实时拓扑结构,同时依据变电站实时拓扑结构确定变电站各一次设备的主保护分区。如果集中式保护装置接收到的电流信息发生缺失,则该算法自适应形成后备保护分区,最后通过算例分析验证了该算法的可行性。

Digital substation has been widely used in China, but the study of centralized protection algorithms is scarce. This paper proposes a centralized protection adaptive zone selection algorithm based on graph theory. The algorithm modifies real-time topology structure of substation according to equipment state information and topology connection of substation, which forms a real-time Vertex-edge adjacency matrix, and also selects primary protection zone online according to real-time topology structure. The algorithm also selects backup protection zone adaptively if the information received by centralized protection device was missing. The results of calculating examples show that the proposed algorithm in this paper is feasible.