本文選題：半潛漂浮式風電機組 + 建模��； 參考：《重慶大學》2014年碩士論文

【摘要】：海上風的強度更大且更具持續(xù)性，，海上風力發(fā)電對新能源的發(fā)展具有戰(zhàn)略意義。中國、美國、日本等國家的海上風能資源主要分布于深海區(qū)域，海上風力發(fā)電由淺海走向深海將會是必然的發(fā)展趨勢。漂浮式風力發(fā)電機以其捕獲深海風資源的能力而被關注，而半潛漂浮式風電機組又以其較好的結構穩(wěn)定性、運行的可靠性、移動的靈活性、適合于深海區(qū)域等特點最具發(fā)展前景。因此，為開發(fā)滿足運行要求的半潛漂浮式風電機組，對其進行仿真技術研究是必不可少的環(huán)節(jié)。論文從這一需求從發(fā)，對半潛漂浮式風力發(fā)電機組展開了系統(tǒng)詳細的研究。 論文的主要研究內(nèi)容和成果如下： （1）針對半潛漂浮式風電機組所承載的兩類環(huán)境載荷，即氣動載荷與水動力載荷，分別進行了建模研究。并通過某MW級半潛漂浮式風電機組模型實例，仿真分析了其空氣動力學性能隨風速變化的特征，以及半潛漂浮式支撐平臺水動力載荷受不同海況影響的特征。 （2）根據(jù)風電機組對不同風速區(qū)域捕風性能的要求，對半潛漂浮式風電機組進行了變轉矩與變槳距控制策略研究。并通過選擇不同類型的風況與海況進行仿真分析，驗證了所設計控制策略的可行性。 （3）根據(jù)海上風電機組設計規(guī)范IEC61400-3設計典型載荷工況，對半潛漂浮式風電機組作了發(fā)電性能與載荷性能研究，得出了不同海況、風況、極端工況對風電機組發(fā)電性能及載荷性能的影響特征。并通過將典型工況下塔基載荷的仿真結果與近海定樁式風電機組仿真結果的對比，得出半潛漂浮式風電機組塔基載荷受漂浮特性影響的一般規(guī)律。 （4）風電機組采用傳統(tǒng)PI變槳距控制存在的“負阻尼”現(xiàn)象對半潛漂浮式風電機組愈發(fā)明顯，并由此引發(fā)了相對較大的發(fā)電功率與結構載荷波動。針對這一問題，提出了兩種分別基于轉速設定值可調(diào)的PI變槳距控制策略，和基于多目標優(yōu)化的LQR控制策略。通過建立Matlab/Simulink模型進行仿真分析，并與基本變槳距控制策略仿真結果進行比較，驗證了所提出兩種改進控制策略的有效性。
[Abstract]:The intensity of offshore wind is stronger and more sustainable, and offshore wind power generation is of strategic significance to the development of new energy. The offshore wind energy resources of China, the United States, Japan and other countries are mainly distributed in the deep sea area, and offshore wind power generation from shallow to deep sea will be the inevitable development trend. Floating wind turbines are concerned for their ability to capture deep-sea wind resources, while semi-submersible floating wind turbines have better structural stability, operational reliability and mobility. Suitable for deep-sea areas and other characteristics of the most promising development. Therefore, in order to develop semi-submersible floating wind turbine, it is necessary to study its simulation technology. From this point of view, the system of semi-submersible floating wind turbine is studied in detail in this paper. The main contents and achievements of the thesis are as follows: 1) two kinds of environmental loads, that is, aerodynamic load and hydrodynamic load, which are carried by semi-submersible floating wind turbine are studied separately. Based on a model example of a MW class semi-submersible floating wind turbine, the characteristics of its aerodynamic performance varying with the wind speed and the influence of different sea conditions on the hydrodynamic load of the semi-submersible floating support platform are simulated and analyzed. 2) according to the requirements of wind capture performance in different wind speed regions, the variable torque and pitch control strategies of semi-submersible floating wind turbine are studied. The feasibility of the proposed control strategy is verified by selecting different types of wind and sea conditions. According to the IEC61400-3 design code for offshore wind turbine, the generation performance and load performance of semi-submersible floating wind turbine are studied, and different sea conditions and wind conditions are obtained. The influence of extreme working conditions on generation performance and load performance of wind turbine. By comparing the simulation results of tower foundation loads under typical operating conditions with those of offshore fixed pile wind turbines, the general law that the basic loads of semi-submersible floating wind turbines are affected by floating characteristics is obtained. (4) the "negative damping" phenomenon of traditional Pi variable pitch control for wind turbine is becoming more and more obvious for semi-submersible floating wind turbine, which leads to relatively large fluctuation of power generation and structural load. In order to solve this problem, two kinds of Pi pitch control strategies based on adjustable rotational speed and LQR control strategy based on multi-objective optimization are proposed. The effectiveness of the two improved control strategies is verified by establishing the Matlab/Simulink model and comparing the simulation results with those of the basic variable pitch control strategy.
【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM315

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