【正文】
就會極度困難) 。 勵磁系統(tǒng)的分類從 20 世紀 50 年代至今,勵磁系統(tǒng)可大致分為以下三類。系統(tǒng)控制部分由 SG3525 搭建的模擬控制器和 M57962 搭建的驅動電路組成。此外,因為并未使發(fā)電機并網(wǎng)發(fā)電,因此本文所設計的系統(tǒng)未加功率因數(shù)和無功功率調節(jié)功能。對于小機組來講,特別是本設計所針對的單臺未并網(wǎng)運行的小型同步發(fā)電機,僅用于對發(fā)電機機端電壓恒定的研究?,F(xiàn)代的同步發(fā)電機,通過改進和發(fā)展,廣泛采用同軸交流無刷勵磁機和旋轉整流器的無刷同步發(fā)電機,避免了碳刷使用造成的弊端。因此,對維護和保障安全運行方面都帶來了諸多問題。老式的自備電站油機發(fā)電機組內,同步發(fā)電機的勵磁廣泛采用直流發(fā)電機提供勵磁電流來發(fā)電。目前很多國家都在研制和試驗用微型機計算機輔以相應的外部硬件設備構成完善的數(shù)字自動調節(jié)勵磁裝置,使其達到實現(xiàn)自適應最佳調節(jié)的目的。在研究自動調節(jié)勵磁裝置方面,還不斷研制并且推廣使用了許多新型的調節(jié)裝置。由于同步電機數(shù)學模型建立的抽象性以及計算求解過程的復雜性,給人們的分析研究帶來了一定的困難。 engineering design遼寧科技大學本科畢業(yè)設計(論文) 第 III 頁目錄摘要 .....................................................................IAbstract................................................................II1 緒論 .........................................................1 勵磁系統(tǒng)概述 ......................................................2 勵磁系統(tǒng)的分類 ....................................................2 直流勵磁機系統(tǒng) ..............................................2 他勵交流勵磁機系統(tǒng) ..........................................2 靜止并勵勵磁系統(tǒng) ............................................2 勵磁系統(tǒng)狀態(tài)監(jiān)測發(fā)展前景 ..........................................32 勵磁系統(tǒng)的建模分析 ...................................................4 建模方法簡介 ......................................................4 飛升曲線法簡介 ....................................................5 本次實驗的方法及數(shù)據(jù)處理 ..........................................73 控制器的設計 .........................................................10 PID 勵磁控制 ......................................................10 勵磁調節(jié)器的 PID 算法 ............................................10 調節(jié)器的工程設計方法 .............................................11 工程設計方法的基本思路 .....................................12 典型Ⅰ型系統(tǒng) ...............................................12 典型Ⅱ型系統(tǒng) ...............................................14 勵磁控制系統(tǒng)的設計 ...............................................16 PID 電壓調節(jié)器參數(shù)整定 ......................................164 開關式自并勵勵磁系統(tǒng)的硬件設計 ....................................18遼寧科技大學本科畢業(yè)設計(論文) 第 IV 頁 同步發(fā)電機勵磁自動控制策略 .......................................18 控制器的設計與應用 ................................................18 PWM 調制器 ..................................................18 驅動電路 ...................................................22 機械功率輸出部分的設計與應用 .....................................23 開關式并勵勵磁系統(tǒng)功率主回路的設計與應用 .........................25 降壓斬波電路簡介 ...........................................25 功率回路分析 ...............................................27 檢測控制單元 .....................................................285 勵磁自動控制系統(tǒng)的仿真及結果分析 .................................29 動態(tài)特性試驗 .....................................................29 直流電源起勵方式 .................................................29 起勵流程 ...................................................30 國家相關標準 ...............................................30 MATLAB 仿真圖 ...............................................31 抗擾動特性試驗 ...................................................31結 論 ...................................................................33致 謝 ...................................................................34參考文獻 ................................................................35遼寧科技大學本科畢業(yè)設計(論文) 第 1 頁1 緒論現(xiàn)實生活中,越來越多的同步發(fā)電機系統(tǒng)應用于像電站、工廠、艦船等獨立供電系統(tǒng)之中。關鍵詞:同步發(fā)電機;飛升曲線法;工程設計法遼寧科技大學本科畢業(yè)設計(論文) 第 II 頁Design of automatic control system for synchronous generator excitationAbstractWith the power industry will continue to development and unit capacity increasing, the requirement of the unit is more and more high. Not only is the unit availability, operation efficiency and safety of, also put forward higher requirements on the unit reliability and economy. As the core control system of generator, the operation state of the excitation system directly influences the reliability and the economy of , it is very important to guarantee the safety and reliability of the excitation system.. The state monitoring and diagnosis of excitation system can not only improve the economic performance of the maintenance, but also improve the reliability of the this paper, through the analysis of the working principle of the excitation system of synchronous generator, using upwards curve method to establish the dynamic mathematical model of excitation control system, a closed loop control system of the regulator using the engineering design method is adopted to design. The automatic control system of generator excitation is established, and the system is results show that the model and control algorithm are then analyzes the lack of self excitation of synchronous generator excitation system, puts forward a new type of chopper control excitation system. Analysis of the working principle of this system, all aspects of the mathematical model are established, and the engineering design method design corresponding regulator, according to the feedback control principle of formation of the automatic control system of self. The experimental results prove the feasibility of the proposed control scheme, and provide some theoretical guidance for the excitation and optimization.Key words:synchronous generator。分析了這種系統(tǒng)的工作原理,建立了各個環(huán)節(jié)的數(shù)學模型,利用工程設計法設計出相應的調節(jié)器,根據(jù)反饋控制原理組建了自勵自動控制系統(tǒng)。實驗結果表明該數(shù)學模型和控制算法是合理的。在本論文中,通過分析了同步發(fā)電機勵磁系統(tǒng)的工作原理,運用飛升曲線法建