【正文】 交流勵(lì)磁發(fā)電機(jī)系統(tǒng)的控制與仿真 【摘 要】 交流勵(lì)磁發(fā)電機(jī)的基本結(jié)構(gòu)與繞線式異步電機(jī)相同，其定子側(cè)杰電網(wǎng)，轉(zhuǎn)子上采用三相對(duì)稱分布的勵(lì)磁繞組，由變頻器提供對(duì)稱交流電勵(lì)磁，且勵(lì)磁電壓的幅值大小、頻率、相位、相序都可根據(jù)要求加以控制，從而可以控制發(fā)電機(jī)勵(lì)磁磁場(chǎng)大小、相對(duì)于轉(zhuǎn)子的位置和電機(jī)的轉(zhuǎn)速，使得交流勵(lì)磁發(fā)電機(jī)具有良好的穩(wěn)定性及轉(zhuǎn)速適應(yīng)能力、獨(dú)立的有功與無功調(diào)節(jié)能力和較強(qiáng)的進(jìn)相運(yùn)行能力，特別適合應(yīng)用于需要變速運(yùn)行的水電機(jī)組、抽水蓄能機(jī)組和風(fēng)電機(jī)組，性能超越傳統(tǒng)同步發(fā)電機(jī)和感應(yīng)發(fā)電機(jī)，因而有著廣闊的應(yīng)用前景。 勵(lì)磁控制系統(tǒng)在形成交流勵(lì)磁發(fā)電機(jī)的 優(yōu)良特性方面起著關(guān)鍵作用主要工作內(nèi)容和成果如下： 研究交流勵(lì)磁發(fā)電機(jī)的 abc 坐標(biāo)系數(shù)學(xué)模型、 dq0 坐標(biāo)系數(shù)學(xué)模型。給出了交流勵(lì)磁發(fā)電機(jī)在同步旋轉(zhuǎn)坐標(biāo)下的基本方程，并得出定轉(zhuǎn)子有功功率、無功功率表達(dá)式。對(duì)交流勵(lì)磁發(fā)電機(jī)靜態(tài)穩(wěn)定性的研究和暫態(tài)穩(wěn)定性的研究。采用定子磁場(chǎng)定向的方法對(duì)交流勵(lì)磁發(fā)電機(jī)系統(tǒng)進(jìn)行矢量控制研究，得出矢量控制方程，確定交流勵(lì)磁發(fā)電機(jī)變速恒頻運(yùn)行以及有功無功解耦調(diào)節(jié)的控制策略。述了交流勵(lì)磁發(fā)電機(jī)勵(lì)磁系統(tǒng)的矢量控制技術(shù)后，實(shí)用 matlab/simulink 軟件對(duì)系統(tǒng)進(jìn)行了仿真分析。 關(guān)鍵詞 ： 交流勵(lì)磁發(fā)電機(jī)；矢量控制；變頻器； matlab/simulink 交流勵(lì)磁發(fā)電機(jī)系統(tǒng)的控制與仿真 【 Abstract】 The basic structure of AC excited generator winding asynchronous motor with the same power, the stator side the rotor excitation winding, the threephase symmetrical distribution, symmetrical alternating current excitation provided by the inverter, and the excitation voltage amplitude, frequency, phase, phase sequence can be controlled according to the requirements, which can control the generator excitation magic field, with respect to the rotor position and speed of the motor, the AC excited generator has the stability and speed of good adaptability, independent of the active and inactive regulation ability and strong capability of running in phase, especially suitable for application in need of hydroelectric generating set, variable speed operation of pumped storage units and wind turbines, performance beyond the traditional synchronous generator and induction generator, so it has broad application prospects. Excitation control system plays a key role in the main contents and results are as follows in the excellent characteristics of formation of AC excited generator: Study of AC excited generator abc coordinate mathematical model, the dq0 coordinate mathematical model. The basic equations of AC excited generator in synchronous rotating coordinates is given, and the stator active power, reactive power expression without. Research on the static stability of AC excited generator research and transient stability. By using the method of stator flux oriented vector control of AC excited generator system, the vector control equations, determine the operation VSCF AC excitation generator and power without the control strategy of power decoupling control. The excitation system of AC excited generator vector control technology, use matlab/simulink software to carry on the simulation analysis system. Key Words: AC Excited Generator 。 Vector Control 。 Inverter 。 MATLAB/Simulink 交流勵(lì)磁發(fā)電機(jī)系統(tǒng)的控制與仿真 目錄 引言 .......................................................................................................................... 1 交流勵(lì)磁發(fā)電機(jī)的研究現(xiàn)狀 .......................................................................... 2 本文主要內(nèi)容 .................................................................................................. 3 1 交流勵(lì)磁 發(fā)電機(jī)的結(jié)構(gòu)與運(yùn)行特性 ................................................................. 4 2. 交流勵(lì)磁 發(fā)電機(jī)的數(shù)學(xué)模型 ............................................................................ 6 abc 三相坐標(biāo)系中交流勵(lì)磁發(fā)電機(jī)的數(shù)學(xué)模型 .................................. 6 電壓方程式 .................................................................................... 7 磁鏈方程式 .................................................................................... 7 交流勵(lì)磁發(fā)電機(jī)的功率方程 ......................................................... 9 機(jī)電運(yùn)動(dòng)方程式 ........................................................................... 10 坐標(biāo)變換 ................................................................................................. 10 坐標(biāo)變換的原則和基本概念 ...................................................... 10 3s/2s 坐標(biāo)變換 ............................................................................. 12 2s/2r 坐標(biāo)變換 .............................................................................. 14 3s/2r 坐標(biāo)變換 .............................................................................. 15 dq0 坐標(biāo)系中交流勵(lì)磁發(fā)電機(jī)的數(shù)學(xué)模型 ....................................... 16 電壓方程式 .................................................................................. 16 磁鏈方程式 .................................................................................. 17 交流勵(lì)磁發(fā)電機(jī)基本電磁關(guān)系 ............................................................. 20 交流勵(lì)磁發(fā)電機(jī)能量流動(dòng)與平衡關(guān)系 ................................................. 22 交流勵(lì)磁發(fā)電機(jī)能量流動(dòng)關(guān)系 .................................................. 22 交流勵(lì)磁發(fā)電機(jī)功率平衡關(guān)系 .................................................. 22 3 交流勵(lì)磁發(fā)電機(jī)勵(lì)磁系統(tǒng)矢量控制策略 ....................................................... 26 矢量控制概述 ......................................................................................... 26 現(xiàn)有交流勵(lì)磁發(fā)電機(jī)勵(lì)磁控制策略分析 ............................................. 28 交流勵(lì)磁發(fā)電機(jī)勵(lì)磁系統(tǒng)矢量控制策略 ............................................. 28 交流勵(lì)磁發(fā)電機(jī)矢量控制策略 .................................................. 28 交流勵(lì)磁發(fā)電機(jī)功率矢量控制 ................................................ 31 4 交流勵(lì)磁發(fā)電機(jī)勵(lì)磁系統(tǒng)的運(yùn)行控制 ........................................................... 34 PWM 控制交 直 交變頻器的基本工作原理 ........................................ 34 不可控整流電路 .......................................................................... 35 交流勵(lì)磁發(fā)電機(jī)系統(tǒng)的控制與仿真 中間電路 ................................................................................................. 36 濾波電路 ....................................................................................... 36 電感濾波 ...................................................................................... 36 逆變電路的工作原理及基本形式 ....................................................... 36 逆變電路的工作原理 .................................................................. 36 PWM 逆變電路的控制方式 .............................................