配电系统非恒功率负荷潮流计算方法

针对配电系统中负荷的非恒功率特性对潮流计算的影响，提出一类改进的基于负荷电压-功率特性的配电网潮流支路前推回代法。算法线性收敛，计算速度快，计算结果能更准确地反映负荷实际电压特性对于各个节点电压和功率的影响。而且对算法收敛性进行分析和证明，给出算法的收敛判据，并证明当满足收敛条件时必存在唯一平衡收敛，说明恒功率潮流计算方法仅是该文提出方法的特例。在美国PG&E的69节点配电系统上的仿真结果表明，与恒功率支路电流法相比，在故障情况下该文提出的方法计算结果能更准确地反映出更多的系统信息，结果验证研究结论的正确性流计算方法相比，在故障情况下该文提出的方法计算结果能更准确地反映出更多的系统信息，结果验证研究结论的正确性和实用性。

Unconstant Power Load Model Flow Calculation in Distribution System

A kind of improved branch power flow calculation method based on power-voltage character of load is put forward aiming at the influence on power flow calculation by load property of non-constant power. The algorithm is with linear convergence and less time consumption. From the calculation results more accurate information of voltage and power of each node can be obtained. The convergence criterion is given and the convergence of algorithm is analyzed and proved. The conclusion that there is one and only one balance convergence point is proved. The power flow calculation method with constant power load branch is the special case of the paper. The simulation on distribution system of American PG&E 69 nodes proves that compared with constant power load branch current method, calculation results of the presented method can offer more system information. And the result shows the effectiveness and usefulness of the approach.