發(fā)布時(shí)間：2018-04-26 22:08

  本文選題：風(fēng)電機(jī)組 + 同步變槳距控制　； 參考：《沈陽(yáng)工業(yè)大學(xué)》2017年碩士論文

【摘要】：由于化石燃料的濫用,全球性的氣候惡化已經(jīng)到了刻不容緩的地步,優(yōu)化能源結(jié)構(gòu)勢(shì)在必行,大力發(fā)展作為清潔能源之一的風(fēng)電可以有效地緩解當(dāng)前環(huán)境問(wèn)題。隨著各國(guó)加大對(duì)風(fēng)電技術(shù)研發(fā)的支持與資助,風(fēng)電機(jī)組已經(jīng)從最初的幾十千瓦發(fā)展到現(xiàn)在的幾兆瓦,海上風(fēng)電的發(fā)展也是日新月異。隨著機(jī)組容量越來(lái)越大,帶來(lái)了新的技術(shù)難題,風(fēng)輪直徑的增大使其所承受的風(fēng)切效應(yīng)導(dǎo)致不平衡氣動(dòng)載荷急劇增大,將直接影響到風(fēng)電機(jī)組的安全運(yùn)行,因此解決這一問(wèn)題迫在眉睫。本文選擇國(guó)內(nèi)某1.5MW的風(fēng)電機(jī)組為研究對(duì)象,主要針對(duì)其額定發(fā)電工作區(qū)間的氣動(dòng)載荷進(jìn)行研究。首先,在MATLAB/Simulink平臺(tái)上建立了風(fēng)電機(jī)組的實(shí)例模型;其次,針對(duì)該工作區(qū)間輸出功率需穩(wěn)定在額定功率附近的要求,設(shè)計(jì)了基于PID控制的同步變槳距控制策略、基于離散模糊控制的同步變槳距控制策略和基于改進(jìn)離散模糊控制的同步變槳距控制策略;然后,通過(guò)對(duì)這三種同步變槳距控制策略仿真效果對(duì)比分析,確定以基于改進(jìn)離散模糊控制的同步變槳距控制策略作為獨(dú)立變槳距控制策略的設(shè)計(jì)基礎(chǔ);最后,為了抑制風(fēng)輪的軸向氣動(dòng)載荷,本文專門設(shè)計(jì)了針對(duì)此載荷類型的基于槳葉方位角權(quán)系數(shù)分配的獨(dú)立變槳距控制策略。仿真結(jié)果表明,當(dāng)風(fēng)電機(jī)組處于額定風(fēng)速和切出風(fēng)速之間時(shí),基于改進(jìn)離散模糊控制的同步變槳距控制策略在穩(wěn)定風(fēng)電機(jī)組的輸出功率方面效果明顯;基于槳葉方位角權(quán)系數(shù)分配的獨(dú)立變槳距控制策略在穩(wěn)定功率輸出和抑制風(fēng)輪軸向氣動(dòng)載荷方面具有較好的控制效果,這也直接證明了文章所提及控制策略的使用價(jià)值。
[Abstract]:Due to the abuse of fossil fuels, the global climate deterioration has reached a state of urgency. It is imperative to optimize the energy structure. Developing wind power as one of the clean energy sources can effectively alleviate the current environmental problems. With the increasing support and funding of wind power technology research and development, wind turbine has been developed from the initial tens of kilowatts to the present several megawatts, offshore wind power development is also changing with each passing day. As the capacity of the wind turbine becomes larger and larger, it brings new technical difficulties. The wind shear effect caused by the increase of the diameter of the wind turbine causes the unbalanced aerodynamic load to increase sharply, which will directly affect the safe operation of the wind turbine. Therefore, it is urgent to solve this problem. In this paper, a domestic 1.5MW wind turbine is chosen as the research object, and the aerodynamic load of its rated working area is studied. Firstly, an example model of wind turbine is established on the MATLAB/Simulink platform. Secondly, the synchronous pitch control strategy based on PID control is designed to meet the requirement that the output power of the working area should be stabilized near the rated power. The synchronous pitch control strategy based on discrete fuzzy control and the synchronous pitch control strategy based on improved discrete fuzzy control are analyzed. The synchronous pitch control strategy based on improved discrete fuzzy control is chosen as the design basis of the independent variable pitch control strategy. Finally, in order to suppress the axial aerodynamic load of the wind turbine, In this paper, an independent pitch control strategy based on azimuth weight coefficient allocation for this load type is designed. The simulation results show that when the wind turbine is between the rated wind speed and the cut out wind speed, the synchronous pitch control strategy based on the improved discrete fuzzy control is effective in stabilizing the output power of the wind turbine. The independent pitch control strategy based on the azimuth weight coefficient of the blade has a good control effect in stabilizing power output and suppressing the axial aerodynamic load of the wind turbine, which directly proves the use value of the control strategy mentioned in this paper.
【學(xué)位授予單位】：沈陽(yáng)工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM315

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本文編號(hào)：1807872