電力系統(tǒng)安全穩(wěn)定控制(一）

1、電力系統(tǒng)安全穩(wěn)定控制(一） 摘 要電力系統(tǒng)安全穩(wěn)定控制是保障系統(tǒng)可靠運(yùn)行的重要手段，一直受到廣泛重視?，F(xiàn)代電力系統(tǒng)規(guī)模迅速發(fā)展的同時(shí)也帶來了更多更復(fù)雜的安全隱患和穩(wěn)定問題。研究和應(yīng)用計(jì)算機(jī)、通信、電子以及現(xiàn)代控制理論等最新技術(shù)和方法，開發(fā)和生產(chǎn)各種穩(wěn)定控制系統(tǒng)及安全自動(dòng)裝置，是電力系統(tǒng)安全運(yùn)行的迫切要求。本文立足于系統(tǒng)的穩(wěn)定控制問題，結(jié)合新一代智能型低頻低壓減載裝置的科研項(xiàng)目，研究了相關(guān)領(lǐng)域并提出了新的思想，為更深入的研究奠定了基礎(chǔ)。本文首先綜述了電力系統(tǒng)安全穩(wěn)定控制的研究現(xiàn)狀，從控制理論及控制措施(裝置)兩方面概述了國(guó)內(nèi)外的主要研究成果。最后簡(jiǎn)要介紹了安全穩(wěn)定控制技術(shù)的發(fā)展趨勢(shì)。電力系統(tǒng)暫態(tài)

2、能量函數(shù)直接法經(jīng)過多年的研究，近來已取得重大進(jìn)展，成為時(shí)域分析的重要輔助方法。本文第二章對(duì)暫態(tài)能量函數(shù)的基本理論和方法作了介紹，重點(diǎn)探討了eeac法及其在穩(wěn)定切機(jī)控制中的應(yīng)用。進(jìn)一步的實(shí)用化還需要大量的工作。多機(jī)系統(tǒng)頻率動(dòng)態(tài)過程是低頻減載方案設(shè)計(jì)的重要依據(jù)，本文在原有線性化擾動(dòng)模型基礎(chǔ)之上，增加了發(fā)電機(jī)和負(fù)荷頻率調(diào)節(jié)效應(yīng)的影響，并進(jìn)行了系統(tǒng)仿真研究。同時(shí)根據(jù)多機(jī)模型特點(diǎn)及仿真結(jié)果提出了一種基于多機(jī)系統(tǒng)的低頻減載設(shè)計(jì)和整定新方案，與傳統(tǒng)方案相比，該方案提高了低頻減載性能及系統(tǒng)運(yùn)行方式的適應(yīng)性。作為方案的一種實(shí)現(xiàn)，本文作者作為主要研制者之一研制開發(fā)了新一代微機(jī)智能型低頻低壓減載裝置。第四章詳細(xì)介紹

3、了裝置改進(jìn)的軟件測(cè)頻算法，按功率定值減載的實(shí)現(xiàn)方法，軟、硬件結(jié)構(gòu)等關(guān)鍵技術(shù)措施。最后給出了裝置的動(dòng)模實(shí)驗(yàn)結(jié)果。關(guān)鍵詞： 安全穩(wěn)定控制 低頻低壓減載 暫態(tài)能量函數(shù) 切機(jī)控制eeac 頻率動(dòng)態(tài)過程 頻率仿真 按功率減載 測(cè)頻算法abstractpower system stability control, on which extensive attention has been paid, is animportant measure to safeguard a reliable power system. with the quick developmentof power system,

4、lots of more complicated security and stability problems are emerged.the safe running of power system requires eagerly the research and use of the latesttechnology of computer, communication , electronics and modern control theory to developand manufacture stability control system and automatically

5、safety control equipment.in this paper, stability control of power system is focused. new ideas whichare the basis of deeper research are developed on the basis of extensive resource onrelated field in the process of researching a new intelligent style under frequency andunder voltage load shedding

6、equipment.the latest research of power system stability control is reviewed firstly in this paper.then, the main achievements at control theory and control equipment are introduced. atthe end, the tendency of safety and stability control technology is introduced.after years of research, direct metho

7、d using transient energy function of power systemhas gotten important development, and has become the main method of time-fiend analysis. in chapter 2, basic theories of tef method are introduced, and the eeacmethod and its application in stability generator tripping control are discussed carefully.

8、a lot of work still need to be done in order to make practical achievement.the frequency transient process of multi-generator system is the important basis of under frequency load shedding scheme design.in this paper, the effects of frequency regulation of generator and load are included onthe basis

9、 of linear disturbance model, and system digital simulation research is includedtoo. according to the characteristics of multi-generator model and results of system digital simulation research, a new design and setscheme of underfrequency load shedding equipment on the basis of multi-generator syste

10、m is developed in this paper. compared&n bsp;with conventional scheme,this scheme advanced the characteristics of under frequency load shedding equipmentand its adaptively to power system running style.as a way to actualize this scheme, a new intelligent style under frequency andunder voltage load s

11、hedding equipment on the basis of microcomputer is developed inthis paper. in chapter 4, the improved algorithm of frequency measurement, the methodof load shedding according to power, and the key technology of software and hardwarestructure are introduced in detail. at the end, the physical simulat

12、ion results of thisequipment are listed.key words:power system stability control under-frequency and under-voltage load sheddingtransient energy function extended equal area criteriongenerator tripping frequency dynamical processload shedding according to power frequency simulation algorithm目 錄摘要abstract第一章 緒論 (1)1-1 引言 (1)1-2 安全穩(wěn)定控制研究現(xiàn)狀 (2)1-3 論文的主要工作和章節(jié)安排 (7)第二章 暫態(tài)能量函數(shù)與切機(jī)穩(wěn)定控制 (8)2-1 多機(jī)系統(tǒng)的經(jīng)典模型和暫態(tài)能量函數(shù) (8)2-2 直接法的假設(shè)和擴(kuò)展等面積定則 (9)2-3 切機(jī)模型及其實(shí)用判據(jù) (12)第三章 多機(jī)系統(tǒng)頻率動(dòng)態(tài)特性及低頻減載的整定 (15)3-1 傳統(tǒng)的單機(jī)模型及整定 (15)3-2 多機(jī)系統(tǒng)頻率動(dòng)態(tài)過程的數(shù)學(xué)模型 (16)3-3 多機(jī)系統(tǒng)頻率動(dòng)態(tài)過程的仿真