1、 I 基于直角坐标系的牛顿拉夫法潮流计算 摘 要 潮流计算是电力网络设计及运行中最基本的计算,对电力网络的各种设计方 案及各种运行方式进行潮流计算,可以得到各种电网各节点的电压,并求得网络 的潮流及网络中各元件的电力损耗,进而求得电能损耗。因此,网络通过潮流计 算可以分析该网络的电压水平高低,功率分布与电力损耗的合理性及经济性等, 从而对该网络的设计及运行做出评价。 本文主要章节内容包括节点导纳矩阵,电力系统潮流计算数学模型,直角坐 标的牛顿拉夫逊法,以及程序设计和算例结果分析。牛顿拉夫逊法潮流计算主 要采用 C 语言编写潮流计算程序,首先编写原始数据的输入程序,将原始数据形 成一个目标文件,
2、打开文件取出数据,根据电力网络连接图列写节点电压方程, 编写计算节点导纳矩阵各个元素的程序,计算各个节点的不平衡量,进行校验, 如不收敛则编写计算雅克比矩阵元素的程序,列写修正方程,利用高斯消去法, 对增广矩阵进行消去,从而解出修正量的值。经过多次迭代,如果经校验节点电 压的不平衡量已收敛,则结束迭代,转入编写计算平衡节点的功率和线路的潮流 分布程序。最后,编写潮流计算的输出程序,输出节点电压的近似值。 关键词:潮流计算,牛顿拉夫逊法,C 语言,节点导纳矩阵,雅克比矩阵 II Newton Laphson flow calculation based on Cartesian coordina
3、te system ABSTRACT Flow calculation is the most basic calculation in the design of the electricity network and the various ways of the operation. Flow calculation is used to calculation of all kinds of designs and the various ways of operation. So we can acquire a variety of nodal voltage and achiev
4、e the power loss in the network and the trend and various components in the network. Then can seek power loss. Therefore, the network can be calculated through the analysis of the level of voltage, power distribution and power losses and the reasonableness, the economy in the network. Node admittance matrix,Digital Analog Function Table ,Newton Raphson of Rectangular coordinates , formula design and results analysis are the main chapter of this article Newton- Raphson flow calculation me