本文選題：風力發(fā)電機 + 動態(tài)特性��； 參考：《燕山大學》2015年碩士論文

【摘要】：能源與環(huán)境是當代社會發(fā)展所面臨的兩大問題,而風力發(fā)電具有無污染、可再生的優(yōu)點,具有相當大的發(fā)展?jié)摿ΑＤ壳帮L力發(fā)電機正朝著商業(yè)化、大型化的方向發(fā)展,隨著大型風機的開發(fā),風力機系統(tǒng)動態(tài)特性研究的重要性日益凸顯,尤其是葉片和塔筒等柔性大的關(guān)鍵部件,在復雜多變的環(huán)境工況下,它們的動態(tài)響應和載荷承受能力往往決定著風機整個系統(tǒng)能否正常運行,因此,對大型風機的動態(tài)特性分析具有重要的實際意義。本文通過對風力發(fā)電機動態(tài)特性的研究,主要做了以下工作:首先,以NREL 5MW風力發(fā)電機為研究對象,利用FAST平臺對風力發(fā)電機進行建模,完成了風力發(fā)電機模態(tài)分析,依此研究風機在靜態(tài)和正常工作下系統(tǒng)振動響應,防止發(fā)生共振現(xiàn)象。其次,為了對風機系統(tǒng)的動態(tài)特性深入研究,本文對風機的控制策略進行了仿真研究,通過理論推導,對原有的控制策略進行了改進,加入了塔筒前后加速度反饋,有效地提高了塔筒的運動阻尼;在此基礎之上為保證風機各部件達到強度要求,本文對包含地震、極端風速和極端風向變化等特定工況下的載荷變化情況進行了仿真,確定了葉片和塔筒長度的極限載荷。從極限載荷出發(fā),在滿足強度要求的情況下,對葉片和塔筒關(guān)鍵部位進行了疲勞分析,從設計角度計算出了在設計壽命內(nèi)不同材料系數(shù)和極限載荷因子下的等效疲勞載荷和疲勞損傷。最后,本文對海上風力機浮式平臺的動態(tài)特性進行了分析,研究了其在0~1Hz白噪波浪的激勵下,風力機剛?cè)崽匦�、空氣動力和入射角這三種因素對海上平臺6個自由度運動的影響。本文還計算了三種海上概念風機對應不同風速和不同海況時風機系統(tǒng)的載荷,分析了不同平臺對風機系統(tǒng)載荷的影響。
[Abstract]:Energy and environment are two major problems facing the development of modern society, and wind power generation has the advantages of non-pollution, renewable, and has considerable potential for development. At present, wind turbine is developing in the direction of commercialization and large-scale. With the development of large fan, the importance of research on dynamic characteristics of wind turbine system is becoming increasingly prominent, especially the key flexible components such as blade and tower, etc. Under complex and changeable environmental conditions, their dynamic response and load bearing capacity often determine the normal operation of the whole fan system. Therefore, it is of great practical significance to analyze the dynamic characteristics of large fan. The main work of this paper is as follows: firstly, taking NREL 5MW wind turbine as research object, using FAST platform to model wind turbine generator, the modal analysis of wind turbine generator is completed. The vibration response of fan system under static and normal operation is studied to prevent resonance. Secondly, in order to deeply study the dynamic characteristics of the fan system, the control strategy of the fan is simulated in this paper. Through theoretical derivation, the original control strategy is improved, and the acceleration feedback before and after the tower is added. The motion damping of tower and cylinder is improved effectively, and on this basis, in order to ensure that the components of the fan meet the strength requirements, the load variation under certain working conditions, including earthquake, extreme wind speed and extreme wind direction, is simulated in this paper. The limit load of blade and tube length is determined. Based on the limit load, the fatigue analysis of the key parts of the blade and the tower tube is carried out under the condition of satisfying the strength requirement. From the design point of view, the equivalent fatigue load and fatigue damage under different material coefficients and limit load factors in the design life are calculated. Finally, the dynamic characteristics of the floating platform of offshore wind turbine are analyzed, and the rigid and flexible characteristics of the platform are studied under the excitation of 0~1Hz white noise wave. The influence of three factors, aerodynamic force and incident angle, on the motion of six degrees of freedom of the offshore platform. This paper also calculates the load of three kinds of offshore concept fans corresponding to different wind speed and different sea conditions, and analyzes the influence of different platforms on the load of fan system.
【學位授予單位】：燕山大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM315

【參考文獻】

相關(guān)期刊論文 前4條

1 許明;田德;王海寬;王麗麗;魏玉通;;風力發(fā)電機組的載荷計算方法概述[J];農(nóng)村牧區(qū)機械化;2009年02期

2 蔣超奇;嚴強;;水平軸與垂直軸風力發(fā)電機的比較研究[J];上海電力;2007年02期

3 陳小波;陳健云;李靜;;海上風力發(fā)電塔脈動風速時程數(shù)值模擬[J];中國電機工程學報;2008年32期

4 方龍;李良碧;;海上漂浮式風機支撐結(jié)構(gòu)疲勞強度分析研究綜述[J];中外船舶科技;2013年03期

相關(guān)碩士學位論文 前1條

1 張晨晨;兆瓦級風力發(fā)電機組的動力學分析[D];沈陽工業(yè)大學;2007年

，

本文編號：1919543