The invention discloses a method for identifying the final
circuit breaker of a multi-valve group in a
direct current system based on an improved Tarjan
algorithm. First, the topological connection relationship between the incoming and outgoing lines of the
alternating current field in the
direct current system, the valve group and the
circuit breaker is abstracted into an undirected connection diagram , according to the state of each
circuit breaker in the
AC field, the
adjacency matrix of the undirected
connectivity graph is corrected, and the final circuit breaker identification problem is transformed into solving the
cut point problem between the valve
bank and the AC line; the Tarjan
algorithm can only obtain the entire undirected
connectivity For the
cut point of the graph, the present invention improves the Tarjan
algorithm. First, the set of
cut points on the path connecting any two vertices in the undirected connected graph is obtained, and the set of vertices passing through the path to the vertex of each valve group is recorded, and the set of vertices is determined. Whether the intersection with the cut
point set of the undirected connected graph contains the breaker cut points, the final breaker set of each valve group is obtained; the final breaker identification method is correct, effective, efficient and stable, and can be solved at one time The last circuit breaker for each valve group.