用前推回推法对配电网进行三相潮流计算

摘要：本课题在分析配电网元件模型的基础上，建立了配电网潮流计算的数学模型。由于配电网的结构和参数与输电网有很大的区别，因此配电网的潮流计算必须采用相适应的算法。配电网的结构特点呈辐射状，在正常运行时是开环的；配电网的另一个特点是配电线路的总长度较输电线路要长且分支较多，配电线路的线径比输电网细导致配电网的R/X较大，且线路的充电电容可以忽略。配电网的潮流计算采用的方法是前推回代法，文中对前推回代法的基本原理、收敛性及计算速度等进行了理论分析比较。仿真算例表明，前推回代法具有编程简单、计算速度快、收敛性好的特点，此方法是配电网潮流计算的有效算法，具有很强的实用性。

关键词　配电网，潮流计算，前推回代法

Using the forward-backward method for three-phase power flow calculation for distribution network

Abstract :This topic distribution network element in the analysis based on the model, the establishment of distribution power flow calculation of the mathematical model. Because of the different structures between transmission networks and distribution networks, the corresponding methods in flow solution of distribution networks must be applied. Distributions network is radial shape and in the condition of regular is annular. Another characteristic of distribution networks is cabinet minister of distribution long than transmission networks. The line diameter of distribution networks is thin than transmission networks, it cause R/X is large of distribution networks and the line’s capacitance can neglect. Load flow calculation of distributions network use back/ forward sweep. It has some peculiarities such as simple procedures and good restrain and so on. This method of distribution network is an effective method of calculating the trend, with some practicality.           

Key words :distribution network，load flow calculation，back/ forward sweep

目   录

1  绪论

1.1  配电网潮流的背景及意义

1.2  本课题国内外研究现状

1.3  本论文所作的工作

1.4   Matlab中矩阵的运算

2.  配电网潮流计算理论

2.1  配电网的分类及运行的特点

2.2  配电网潮流算法的要求

2.3  配电网潮流计算数学模型

2.3.1  电力线路的数学模型

2.3.2  变压器的等值电路

2.3.3 电力系统节点分类

3  基于前推回代法的配电网潮流计算实例分析

3.1  配电网前推回代的基本算法

3.2  基于支路电流的前推回推法

3.3  基于支路电流的前推回代法求解步骤

3.4  基于支路电流的前推回代法的流程图

3.5  算例分析

4 总 结

附  录

参考文献

致  谢