电力线路架空地线分流电流的计算

Shunt currents computation of ground lines in power circuits

为了分析计算节点间存在电气连接的复杂电力网络,在原双侧消去法的基础上,以节点电压为变量,建立含有各段电流的节点电压方程,选择每段导体与大地间的网孔为回路,采用回路法建立方程组,进而求解出各段电流。这种方法的优点在于扩大了双侧消去法的应用范围,同时保留了双侧消去法方程阶数小,求解速度快的优点。在实际工程中,可以处理电力线路附近连接复杂的金属管线、架空地线。最后分析了不同情况的架空地线在线路故障时的分流。

In order to calculate the complex power network where connection between nodes exits, this paper build the equations to solve the current of each part of the network basing on double-sided elimination method. This paper extends the application scope of CDSEM with reserving the advantage of CDSEM. At the end of this paper, the current of the ground line are calculated.