【正文】 nt function of the electric power system is analyzed, fault calculation, relay protection, safety analysis tools necessary. Is the calculation of the steady state operation of normal and fault conditions of plex power system under the. The results of power flow calculation is the basis of putation and fault analysis of power system stability. Power flow calculation is the basis of all kinds of power system calculation, and it is also an important function of power system analysis, the research on the operating mode of power system planning and design of the existing power system, need to use power flow calculation to quantitative parison of the rationality of power supply scheme and operation mode of the existing power system, reliability and economy. The actual power flow technology that mainly uses the NewtonRaphson method. The traditional flow calculation program lacks a graphical user interface, the display is not intuitive, it is difficult to integrate with other analysis function. The work input data and heavy workload and error prone. With the rapid development of puter technology, Microsoft windows operating system has long been familiar, its friendly graphical user interface has bee PC standard, and the application of the DOS operating system because of its interface is not friendly enough, the power system analysis software development with windows style interface has bee the main trend. In addition, the traditional design method is a structured program design method, this method is based on the function deposition, the software engineering as a bination of objects, due to a particular problem domain, the position of the object is essentially the same, therefore, based on the software structure of the object deposition method on the design of stable, easy to maintain and expansion. The development of design idea and overall structure of this paper introduces the graphical power flow calculation software, expounds the function and features of the software. According to the characteristics of the power system, the graphical trend MATLAB language operating system running on a windows calculation software. The main feature of this system is simple, intuitive graphical interface, accurate calculation of stable operation. In the calculation, the algorithm made some improvements, improve the calculation speed, and the effective encapsulation of class program module has good maintainability and reusability. Keywords: power flow calculation。 MATLAB 安徽工程大學機電學院畢業(yè)設計（論文） III 目錄 引言 ............................................................................................................................................ 1 第 1 章 電力系統(tǒng)潮流計算概述 .............................................................................................. 2 電力系統(tǒng)敘述 .................................................................................................................. 2 潮流計算簡介 .................................................................................................................. 2 潮流計算的意義及其發(fā)展 .............................................................................................. 3 第 2 章 潮流計算的數(shù)學模型 .................................................................................................. 4 導納矩陣的原理及計算方法 .......................................................................................... 4 潮流計算的基本方程 ...................................................................................................... 7 電力系統(tǒng)節(jié)點分類 .......................................................................................................... 9 潮流計算的約束條件 .................................................................................................... 10 第 3 章 牛頓－拉夫遜法概述 ................................................................................................ 12 牛頓－拉夫遜法基本原理 ............................................................................................ 12 牛頓 拉夫遜法潮流求解過程 ..................................................................................... 13 牛頓 —拉夫遜法的程序框圖 ........................................................................................ 17 第 4 章 MATLAB 概述 .......................................................................................................... 18 MATLAB 簡介 ............................................................................................................... 18 MATLAB 應用在潮流計算中的優(yōu)勢 ........................................................................... 18 矩陣的運算 .................................................................................................................... 19 第 5 章 潮流計算主界面設計實現(xiàn) ........................................................................................ 21 主界面介紹 .................................................................................................................... 21 數(shù)據(jù)初始化 .................................................................................................................... 21 潮流計算 ........................................................................................................................ 22 數(shù)據(jù)處理 ........................................................................................................................ 23 數(shù)據(jù)傳遞的問題 ............................................................................................................ 23 例：某電網(wǎng)接線圖及給定的參數(shù) ................................................................................ 24 運算結果 ......................................................................................................................... 24 第 6 章 系統(tǒng)潮流計算的前沿算法及發(fā)展前景 .................................................................... 31 保留非線性算法 ............................................................................................................ 31 最優(yōu)潮流分析法 ....