基于Dijkstra算法的广域自适应跳闸策略

为了减小故障切除范围和实现大规模互联电网的快速自适应跳闸,提出了一种基于图论搜索技术的广域自适应跳闸策略。从图论角度出发,构建被保护元件——断路器邻接矩阵和断路器邻接矩阵,并根据断路器的运行状态修正邻接矩阵。以故障元件或失灵断路器为源点,通过Dijkstra算法得到与源点连接的断路器路径,最后根据所获取的距离值和路径确定跳闸策略。算例分析表明,所提方法能够根据电网实时拓扑结构、故障元件位置和断路器状态实现跳闸断路器在线搜索,跳闸策略能够很好地满足广域保护配合要求。

Self-adaptive tripping strategy based on Dijkstra algorithm for wide-area protection

In order to minimize the range of fault isolation and achieve the rapid self-adaptive trip of large-scale interconnected power grid, a wide-area self-adaptive tripping strategy based on graph theory search technology is proposed. Starting from the graph theory perspective, the protected element-circuit breaker adjacency matrix and circuit breaker adjacency matrix are set up, and the adjacency matrix is modified based on the operation state of the circuit breaker; with fault element or failure circuit breaker as source point, circuit breaker paths connected with source point is obtained through Dijkstra algorithm. Finally, self-adaptive tripping strategy is established by the distance values and paths. According to the examples analysis, the method proposed can be used to achieve the online search of tripping circuit breaker based on the real-time topological structure of the power grid, fault element position and circuit breaker state, and the tripping strategy can be used to meet the coordination requirements of wide-area protection. This work is supported by Industry Key Research Foundation of Shaanxi Province (No. 2015GY049).