本文關(guān)鍵詞： 風(fēng)力發(fā)電機(jī)組 FAST 控制策略 獨(dú)立變槳　出處：《重慶大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：近幾年來風(fēng)力發(fā)電機(jī)發(fā)展趨勢是越來越大型化，塔架越來越高。三葉片的風(fēng)力發(fā)電機(jī)組存在水平風(fēng)速梯度與垂直風(fēng)速梯度，導(dǎo)致風(fēng)速在風(fēng)輪掃掠面上不均勻分布，各個(gè)葉片上的速度矢量三角形將不相等；使風(fēng)輪在旋轉(zhuǎn)過程中所受的氣動(dòng)力中心處于變動(dòng)狀態(tài)下，從而給風(fēng)輪造成交變載荷。同時(shí)由于風(fēng)速的大小和方向在時(shí)刻變化，湍流、陣風(fēng)等都對風(fēng)輪產(chǎn)生激振力，，這些都是造成風(fēng)力機(jī)疲勞載荷的主要來源；由于風(fēng)力發(fā)電機(jī)功率越來越大，結(jié)構(gòu)也越來越大，國產(chǎn)化風(fēng)力發(fā)電機(jī)振動(dòng)問題越來越突出。風(fēng)力發(fā)電場附近居民對風(fēng)力發(fā)電機(jī)組產(chǎn)生振動(dòng)噪聲煩擾的投訴、申告也越來越多，甚至威脅到風(fēng)力發(fā)電機(jī)的正常國產(chǎn)產(chǎn)業(yè)化。因此，本文對減小風(fēng)力發(fā)電機(jī)組因三個(gè)葉片受力不均導(dǎo)致的疲勞載荷及振動(dòng)問題做了相應(yīng)的研究。 論文主要以某兆瓦級(jí)風(fēng)力發(fā)電機(jī)組為研究對象，應(yīng)用美國可再生能源實(shí)驗(yàn)研發(fā)的一款集風(fēng)力機(jī)設(shè)計(jì)與載荷計(jì)算于一體的軟件FAST對風(fēng)力機(jī)進(jìn)行建模、仿真，并用FAST軟件與Matlab7.1/Simulink進(jìn)行聯(lián)合仿真，在Simulink中采用現(xiàn)代控制策略，仿真結(jié)果表明論文中所提出的控制算法是有效的。本論文主要結(jié)構(gòu)內(nèi)容有以下幾章： 第一章：緒論。主要介紹了本論文研究的背景，對國內(nèi)外風(fēng)力發(fā)電機(jī)組現(xiàn)狀及其發(fā)展趨勢做了介紹。 第二章：介紹了本課題FAST軟件應(yīng)用到的風(fēng)力發(fā)電機(jī)組的基礎(chǔ)理論知識(shí)：葉素動(dòng)量理論、GDW理論、結(jié)構(gòu)動(dòng)力學(xué)，F(xiàn)AST軟件構(gòu)架。 第三章：介紹了風(fēng)力發(fā)電機(jī)組整機(jī)經(jīng)典模型以及風(fēng)速模型，運(yùn)用FAST軟件對風(fēng)力發(fā)電機(jī)組建模，將其仿真結(jié)果與權(quán)威軟件Bladed仿真結(jié)果進(jìn)行對比，驗(yàn)證FAST軟件可行性。 第四章：介紹了變速變槳風(fēng)力發(fā)電機(jī)組的基本運(yùn)行區(qū)域和控制系統(tǒng)，分析了風(fēng)機(jī)在額定風(fēng)速以下的控制策略，額定風(fēng)速以上的控制策略。 第五章：運(yùn)用現(xiàn)代控制方法實(shí)現(xiàn)風(fēng)力發(fā)電機(jī)組的變速變槳控制，基于FAST和MATLAB7.1/Simulink的風(fēng)力發(fā)電機(jī)組控制器設(shè)計(jì)，在Simulink中搭建模型，實(shí)現(xiàn)風(fēng)力發(fā)電機(jī)組的獨(dú)立變槳控制，應(yīng)用獨(dú)立變槳控制策略來減小因三葉片受力不均導(dǎo)致的疲勞載荷問題。仿真結(jié)果表明該控制策略是有效的。 第六章：結(jié)論與展望。
[Abstract]:In recent years, the development trend of wind turbine is becoming larger and larger, and the tower is higher and higher. The horizontal and vertical wind speed gradient exists in the wind turbine with three blades, which leads to the uneven distribution of wind speed on the swept surface of wind turbine. The velocity vector triangles on each blade will not be equal; the aerodynamic center of the wind wheel will be in a variable state during the rotation process, thus creating an alternating load on the wind turbine. At the same time, because the magnitude and direction of the wind speed are changing at all times, the turbulence, Wind gusts and so on all produce exciting force to the wind turbine, these are the main source of the wind turbine fatigue load; because the power of the wind turbine is increasing, the structure is also getting bigger and bigger. The vibration problem of the domestic wind turbine is becoming more and more serious. The residents in the vicinity of the wind farm complain more and more about the vibration and noise disturbance caused by the wind turbine, and even threaten the normal domestic industrialization of the wind turbine. In this paper, the problem of reducing the fatigue load and vibration of wind turbine due to the uneven force of three blades is studied. In this paper, a megawatt wind turbine is used as the research object. A software FAST, which integrates wind turbine design and load calculation, is used to model and simulate the wind turbine. The simulation results show that the control algorithm proposed in this paper is effective. The main structure of this paper is as follows:. Chapter one: introduction. This paper introduces the background of this paper, and introduces the current situation and development trend of wind turbine at home and abroad. Chapter 2: the basic theoretical knowledge of wind turbine applied in FAST software is introduced: the momentum theory of blade element and the structure dynamics of fast software. Chapter 3: the classic wind turbine model and wind speed model are introduced. FAST software is used to model the wind turbine. The simulation results are compared with the authoritative Bladed simulation results to verify the feasibility of FAST software. Chapter 4th: introduces the basic operation area and control system of variable speed variable propeller wind turbine, analyzes the control strategy of fan under rated wind speed, and the control strategy above rated wind speed. Chapter 5th: using the modern control method to realize the variable speed variable propeller control of the wind turbine, the controller design of the wind turbine based on FAST and MATLAB7.1/Simulink, build the model in the Simulink, realize the independent variable propeller control of the wind turbine, The independent variable propeller control strategy is applied to reduce the fatigue load caused by the uneven force on the three blades. The simulation results show that the control strategy is effective. Chapter 6th: conclusions and prospects.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM315

【引證文獻(xiàn)】

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1 石瓊;;兆瓦級(jí)直驅(qū)風(fēng)力發(fā)電機(jī)組3D仿真培訓(xùn)裝備研制[J];湖南工程學(xué)院學(xué)報(bào)(自然科學(xué)版);2017年01期

2 汪一波;黃亦翔;王雙園;張大慶;;基于Simulink的風(fēng)電機(jī)組可視化仿真系統(tǒng)模型設(shè)計(jì)[J];機(jī)電一體化;2016年10期

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1 胡雁東;基于MATLAB的變速恒頻雙饋風(fēng)力發(fā)電機(jī)組控制技術(shù)研究與實(shí)現(xiàn)[D];重慶大學(xué);2016年

本文編號(hào)：1544935