中文说明：
电力系统拓扑分析、孤岛数，关联矩阵法把主接线的节点和母线的每一进出线连接点作为拓扑图的节 点，把开关元件作为拓扑图的支路，建立节点．支路关联矩阵表示电网的基本拓 扑结构。然后定义矩阵“与．或’’乘法运算，利用连通性的传递性质实现对电力 网络结构的辨识。
English Description：
Power system topology analysis, islanding number, incidence matrix method takes the node of main connection and each connection point of bus's incoming and outgoing lines as the node of topology diagram, and takes switch element as branch of topology diagram to establish node. Branch incidence matrix represents the basic topological structure of power grid. Then, the matrix "and. Or" multiplication operation is defined, and the power network structure is identified by using the transmission property of connectivity.