本文關(guān)鍵詞： 電力系統(tǒng) 暫態(tài)穩(wěn)定 攝動法 變步長 GUI　出處：《廣西大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著我國電力建設(shè)發(fā)展迅速,特高壓交流、直流系統(tǒng)不斷完善聯(lián)網(wǎng),電網(wǎng)絡(luò)構(gòu)架逐漸擴(kuò)大,互相之間的聯(lián)系加強(qiáng)與復(fù)雜化是必然的趨勢。電網(wǎng)的穩(wěn)定性問題越來越突出。近年來的大停電事件也給了我們深刻的警醒。暫態(tài)穩(wěn)定性分析計(jì)算是電力系統(tǒng)三大經(jīng)典計(jì)算之一,也是電力系統(tǒng)規(guī)劃、設(shè)計(jì)、調(diào)度運(yùn)行與控制必不可少的一項(xiàng)重要的計(jì)算任務(wù)。因此,電力系統(tǒng)暫態(tài)穩(wěn)定計(jì)算研究具有重要的實(shí)際意義。電力系統(tǒng)暫態(tài)穩(wěn)定數(shù)值計(jì)算,是在時(shí)域內(nèi)求解系統(tǒng)的微分代數(shù)方程組。本文針對暫態(tài)穩(wěn)定數(shù)值計(jì)算方法做了如下的研究工作:1、暫態(tài)穩(wěn)定數(shù)值計(jì)算的速度和精度一直是研究的重點(diǎn)問題。本文針對提高數(shù)值計(jì)算的仿真速度方面,提出了一種基于變步長方法和攝動法相結(jié)合的電力系統(tǒng)暫態(tài)穩(wěn)定計(jì)算仿真算法,并且提出了相應(yīng)的變步長修正策略。該算法的特點(diǎn)包括:(1)用攝動法代替?zhèn)鹘y(tǒng)的牛頓迭代法求解電力系統(tǒng)的微分代數(shù)方程,攝動法和傳統(tǒng)的牛頓迭代法相比具有相同的計(jì)算精度,在求解時(shí)省去了大量的迭代計(jì)算,減小計(jì)算量,提高仿真速度。(2)通過變步長的方法,在攝動法求解微分代數(shù)方程的框架下,根據(jù)局部誤差理論與預(yù)估校正變步長的計(jì)算格式,對步長進(jìn)行動態(tài)調(diào)整,在保證計(jì)算精度的前提下,仿真的步數(shù)減少,與定步長相比進(jìn)一步提高了仿真速度。變步長攝動法理論推導(dǎo)清晰明確、計(jì)算過程簡明。仿真算例結(jié)果證明,所提出的基于變步長攝動法的電力系統(tǒng)暫態(tài)穩(wěn)定計(jì)算是有效的。2、在 MATLAB 圖形用戶界面(Graphical User Interface,GUI)工作平臺上,設(shè)計(jì)了軟件主界面并嵌入后臺程序,開發(fā)出一個(gè)電力系統(tǒng)暫態(tài)穩(wěn)定計(jì)算軟件-電力系統(tǒng)暫態(tài)穩(wěn)定計(jì)算V1.0。該軟件集成了多種發(fā)電機(jī)模型,多種暫態(tài)穩(wěn)定數(shù)值計(jì)算方法,包括本文第2章介紹的傳統(tǒng)算法和第3、4章的攝動法和變步長攝動法。它的主要功能有:(1)供用戶選擇不同的仿真算例;(2)用戶可以對發(fā)電機(jī)模型、計(jì)算方法、故障類型、仿真時(shí)間進(jìn)行選擇與設(shè)置;(3)通過輸出界面直觀的顯示發(fā)電機(jī)機(jī)端電壓隨時(shí)間變化的曲線和發(fā)電機(jī)的搖擺曲線。該軟件直觀、簡潔、形象,方便用戶使用,并且它是一個(gè)開源軟件,也可以供用戶不斷完善和增加其它功能模塊。
[Abstract]:With the rapid development of China's electric power construction, UHV AC DC system, and constantly improve the network, electric network architecture is gradually expanding, and strengthen the connection between the complex is an inevitable trend. The stability of the power grid is becoming more and more serious. In recent years the blackout has given us a profound wake-up call. Transient stability analysis is one of the three classic calculation of power system, but also the power system planning, design, an important task of calculating essential operation and control scheduling. Therefore, the power system transient stability calculation has important practical significance. The numerical calculation of transient stability of power system, is solved in time domain system of differential algebraic equations in this paper. Transient stability numerical calculation method to do the research work as follows: 1. The speed and accuracy of the numerical calculation of transient stability has been the focus of the study in this paper. To improve the simulation speed of numerical calculation, proposed a simulation algorithm of variable step size method and perturbation method based on the combination of the transient stability of power system, and put forward the corresponding correction variable step strategy. The characteristics of the algorithm include: (1) Newton iteration method for solving differential algebraic equations with perturbation method instead of power system the traditional perturbation method and compared with the traditional Newton iteration with the same precision, when solving the calculation eliminates the need for a large number of iterations, reduce the amount of computation and improve the simulation speed. (2) through the method of variable step perturbation method, in the framework of differential algebraic equations, based on the local error theory and the variable step predictor corrector scheme, dynamic adjustment of the step in ensuring the accuracy of the simulation, the number of steps to reduce, and step further than to improve the simulation speed. Variable step length perturbation theory A clear, concise calculation process. The simulation results prove that the proposed calculation of power system transient stability perturbation method based on step is effective in.2, MATLAB graphical user interface (Graphical User Interface, GUI) on the working platform, the design of the main interface of software and embedded into the background program, developed a power system transient stability calculation software of power system transient stability calculation software V1.0. the integration of a variety of generator model, numerical calculation method of transient stability, including the traditional algorithm in the second chapter and chapter 3,4 of the perturbation method and the variable step perturbation method. Its main features are: (1) for the user to choose different a simulation example; (2) the user can of generator model, calculation method, fault type, the simulation time to choose and set; (3) through the output interface of the display generator terminal voltage changes with time. The rocking curve of line and generator. The software is intuitive, concise, image and convenient for users to use, and it is an open source software, and it can also continuously improve and add other functional modules to users.

【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM712;TP311.52

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本文編號：1507250