一种新的配电网三相潮流算法

提出一种用于不平衡辐射状配电网的三相潮流计算方法。根据配电网的辐射状结构特点，将分支线作为配网结构的基本单元，把馈线分支首节点的电压、电流表示为分支末节点电压、电流的函数．重新建立潮流方程，使方程的数目与分支线数目成正比，大幅度减少方程式和变量的数目。并且根据配电网的特点近似简化雅可比矩阵．以实现解耦。建立了单相系统模型和三相系统模型，给出了潮流的解耦算法。相对于传统计算方法未知数正比于母线数目，可以大幅度减少方程数，缩短计算时间，特别适用于大规模配电系统。

Three-phase power flow method for distribution system

A three-phase power flow method for general unbalanced radial distribution systems is presented. According to the radial feature,the branch is taken as a basic unit and the voltage and current of the root node of a branch is considered as a function of those of the end node. A new formulation of three-phase distribution power flow equations is thus presented,which makes the quantity of equations and variables directly proportional to that of branches and greatly reduced. The Jacobi matrix is simplified for decoupling. The single-phase and three-phase system models are built up,and the decoupled power flow is put forward. Compared with the conventional formulation, it significantly reduces calculating time and the quantity of power flow equations. The proposed solution algorithm is especially fit for large-scale distribution systems.