电力系统潮流计算毕业设计论文_精品.doc

电力系统潮流计算毕业设计论文 摘要电力系统的潮流计算在电力系统稳态分析和电力系统设计中有很重要的作用潮流计算也是电力系统暂态分析的基础潮流计算是根据给定的系统运行条件来计算系统各个部分的运行状况主要包括电压和功率的计算到目前为止利用电子计算机进行电力系统的潮流计算的算法已经出现了很多其中应用最为广泛的是基于牛顿拉夫逊法的潮流计算方法在利用计算机进行电力系统的潮流计算之前需要对网络的节点进行划分和编号建立电力网络的数学模型即电力系统的网络方程式本文主要介绍了节点导纳矩阵的形成方法在形成节点导纳矩阵之前需要将电力网络进行等值电路的变换其中主要包括输电线路和变压器的等值电路的变换由于牛顿拉夫逊潮流计算对于初值的给定有比较高的要求因此在进行牛顿拉夫逊迭代计算前先采用高斯赛德尔迭代法产生一组比较精确的初值本文详细介绍了高斯赛德尔法和牛顿拉夫逊法迭代计算的过程其中主要内容有迭代方程式的建立雅克比矩阵的计算功率和电压的计算以及在迭代过程中PV节点转化为PQ节点时的处理方法开发工具采用Matlab编程语言采用读写Excel电子表格的方法进行数据的输入和输出本文采用一个5节点的网络进行实例分析用Matlab开发的计算程序进行潮流计算计算结果表明程序的算法具有良好的收敛性和实用性关键字潮流计算节点导纳矩阵牛顿拉夫逊高斯赛德尔MatlabAbstractPower flow calculation has a very important role in power system steady-state analysis and power system design and it is also the basis of transient analysis in power system Flow calculation is based on given conditions of the power system and calculates the operational status of every part of the system including voltage and power So far there are kinds of algorithm which use the electronic computer in power flow calculation the most widely used algorithm is the Newton - Raphson power flow calculation methodBefore we the computer in power flow calculation we need to need to have the nodes of the network classified and numbered and establish a mathematical model of power network namely the power system network equations This paper describes the formation of the node admittance matrix In the formation of the node admittance matrix we need to transform the power network to equivalent circuit which includes transformation of transmission lines and transformersThe Newton - Raphson power flow calculation has a relatively high demand for a given initial value So before the Newton - Raphson iteration we use Gauss - Seidel iterative method to produce a more precise initial value This paper describes the process of Gauss - Seidel and Newton - Raphson iteration The main contents are the establishment of iterative equation the calculation of Jacobian matrix and the calculation of power an