电压公共回路
commonality loop of voltage
多回路同塔架设
multi-circuits transmission lines on single tower
三回路同塔
triple-circuit single pole
四回路同杆
Quadruple-circuit lines on the same pole
分路-回路关联矩阵
branch-path incidence matrix
支路-回路关联矩阵
branch-path incidence matrix