電力系統(tǒng)潮流計(jì)算畢業(yè)論文

1、摘要 摘要電力系統(tǒng)的潮流計(jì)算在電力系統(tǒng)穩(wěn)態(tài)分析和電力系統(tǒng)設(shè)計(jì)中有很重要的作用，潮流計(jì)算也是電力系統(tǒng)暫態(tài)分析的基礎(chǔ)。潮流計(jì)算是根據(jù)給定的系統(tǒng)運(yùn)行條件來計(jì)算系統(tǒng)各個(gè)部分的運(yùn)行狀況，主要包括電壓和功率的計(jì)算。到目前為 止，利用電子計(jì)算機(jī)進(jìn)行電力系統(tǒng)的潮流計(jì)算的算法已經(jīng)出現(xiàn)了很多，其中應(yīng)用最為廣泛的是基于牛頓——拉夫遜法的潮流計(jì)算方法。在利用計(jì)算機(jī)進(jìn)行電力系統(tǒng)的潮流計(jì)算之前，需要對(duì)網(wǎng)絡(luò)的節(jié)點(diǎn)進(jìn)行劃分和編號(hào)，建立電力網(wǎng)絡(luò)的數(shù)學(xué)模型，即電力系統(tǒng)的網(wǎng)

2、絡(luò)方程式。本文主要介紹了節(jié)點(diǎn)導(dǎo)納矩陣的形成方法。在形成節(jié)點(diǎn)導(dǎo)納矩陣之前，需要將電力網(wǎng)絡(luò)進(jìn)行等值電路的變換，其中主要包括輸電線路和變壓器的等值電路的變換。由于牛頓——拉夫遜潮流計(jì)算對(duì)于初值的給定有比較高的要求。因此在進(jìn)行牛頓——拉夫遜迭代計(jì)算前，先采用高斯——賽德爾迭代法產(chǎn)生一組比較精確的初值。本文詳細(xì)介紹了高斯——賽德爾法和牛頓——拉夫遜法迭代計(jì)算的過程。其中主要內(nèi)容有迭代方程式的建立，雅克比矩陣的計(jì)算，功率和電壓的計(jì)算，以及在迭代過程

3、中 PV 節(jié)點(diǎn)轉(zhuǎn)化為 PQ 節(jié)點(diǎn)時(shí)的處理方法。開發(fā)工具采用 Matlab 編程語言，采用讀寫 Excel 電子表格的方法進(jìn)行數(shù)據(jù)的輸入和輸出。本文采用一個(gè) 5 節(jié)點(diǎn)的網(wǎng)絡(luò)進(jìn)行實(shí)例分析，用 Matlab 開發(fā)的計(jì)算程序進(jìn)行潮流計(jì)算，計(jì)算結(jié)果表明程序的算法具有良好的收斂性和實(shí)用性。關(guān)鍵字 關(guān)鍵字：潮流計(jì)算，節(jié)點(diǎn)導(dǎo)納矩陣，牛頓——拉夫遜，高斯——賽德爾，MatlabAbstractPower flow calculation has a ve

4、ry 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 calcu

5、lates the operational status of every part of the system, including voltage and power. So far, there are kinds of algorithm which 目錄 目錄第 1 章 緒論.............................................................................

6、.....................................11.1 課題背景.........................................................................................................1 1.2 選題意義...........................................................

7、..............................................11.3 潮流計(jì)算及其現(xiàn)狀及其發(fā)展趨勢(shì).................................................................21.4 本畢業(yè)設(shè)計(jì)主要工作............................................................................

8、.........3第 2 章 電力系統(tǒng)潮流計(jì)算基本原理..........................................................................42.1 電力網(wǎng)絡(luò)的數(shù)學(xué)模型.....................................................................................42.1.1 電力網(wǎng)絡(luò)的基本方程式..

9、.....................................................................42.1.2 自導(dǎo)納和互導(dǎo)納的確定方法..............................................................52.1.3 節(jié)點(diǎn)導(dǎo)納矩陣的性質(zhì)及意義...................................................

10、...........72.1.4 非標(biāo)準(zhǔn)變比變壓器等值電路..............................................................82.2 潮流計(jì)算的數(shù)學(xué)模型...................................................................................102.2.1 潮流計(jì)算的節(jié)點(diǎn)類型.............

11、.........................................................102.2.2 潮流計(jì)算基本方程..........................................................................102.3 潮流計(jì)算的約束條件.........................................................

12、..........................122.4 潮流計(jì)算方法...............................................................................................132.4.1 牛頓——拉夫遜法.......................................................................

13、.....132.4.2 高斯——賽德爾法............................................................................132.4.3 PQ 分解法........................................................................................142.4.4 擬牛頓算法......

14、................................................................................162.5 Matlab 簡(jiǎn)介..................................................................................................162.5.1 Matlab 概述 .........

15、...............................................................................162.5.2 matlab GUI 簡(jiǎn)介................................................................................162.5.3 GUI 設(shè)計(jì)模板及設(shè)計(jì)窗口...................

16、.............................................172.5.4 GUI 設(shè)計(jì)的基本操作........................................................................17第 3 章 牛頓拉夫遜潮流計(jì)算理論分析...............................................................

17、.....183.1 概述...............................................................................................................183.2 牛頓法基本原理...................................................................................

18、........18 3.3 牛頓法潮流計(jì)算方程...................................................................................223.3.1 節(jié)點(diǎn)功率方程.....................................................................................223.3.2 修正方程.

19、.........................................................................................233.4 牛頓法潮流計(jì)算主要流程...........................................................................26第 4 章 基于 matlab 潮流計(jì)算軟件的實(shí)現(xiàn)............

20、..................................................284.1 登陸界面的設(shè)計(jì)實(shí)現(xiàn)...................................................................................28 4.2 潮流計(jì)算主界面設(shè)計(jì)實(shí)現(xiàn)......................................................

21、.....................284.2.1 主界面介紹........................................................................................28 4.2.2 數(shù)據(jù)初始化....................................................................................

22、....294.2.3 潮流計(jì)算............................................................................................30 4.2.4 數(shù)據(jù)處理............................................................................................32 4.2.