【摘要】：在經(jīng)濟快速發(fā)展,能源需求日益短缺、環(huán)境極度惡化的現(xiàn)代社會,發(fā)展清潔可再生能源成為至關(guān)重要的人類課題。在諸多清潔能源中,風能以其清潔無污染、蘊含量大和無副作用等優(yōu)點成為近年來國內(nèi)外學者研究的熱點。我國蘊含豐富的風能資源,主要集中在西北部和沿海地區(qū),在風力發(fā)電領(lǐng)域具有廣闊的發(fā)展前景,開發(fā)潛力巨大。論文以直驅(qū)永磁同步風力發(fā)電機組作為主要研究對象,對發(fā)電機輸出有功功率控制進行深入的研究。 論文首先對永磁同步風力發(fā)電機組的主要組成部分進行分析,闡釋各部分的工作原理以及在系統(tǒng)中的作用和意義,根據(jù)各組成部分之間的聯(lián)系進行數(shù)學建模。給出了雙PWM模型,并在此基礎(chǔ)上建立電機側(cè)、電網(wǎng)側(cè)的控制策略。為了改善風速變化給發(fā)電機輸出功率所帶來的影響,提出基于風力機變槳系統(tǒng)延時環(huán)節(jié)的Smith預估補償?shù)姆椒?設(shè)計了模糊+Smith預估控制器；再根據(jù)電壓矢量控制的原則建立功率、電流雙閉環(huán)的電機側(cè)控制策略,通過設(shè)計滑模控制器和在線自調(diào)整準滑�？刂破鞔�?zhèn)鹘y(tǒng)的PI控制來改善輸出功率波動的問題。仿真結(jié)果表明,所設(shè)計的模糊Smith預估控制器以及在線自調(diào)整準滑模控制器對于抑制變化風速下功率波動具有很好的效果,改善了直驅(qū)同步發(fā)電機組的控制性能。
[Abstract]:With the rapid development of economy, the shortage of energy demand and the extreme deterioration of environment, the development of clean and renewable energy has become a crucial human issue. Among all the clean energy sources, wind energy has become a hot research topic in recent years because of its advantages of clean and pollution-free, large amount of energy and no side effects. China contains abundant wind energy resources, mainly concentrated in the northwest and coastal areas, has a broad development prospects in the field of wind power, development potential is huge. In this paper, the direct drive permanent magnet synchronous wind turbine is taken as the main research object, and the active power control of generator output is studied deeply. Firstly, the main components of permanent magnet synchronous wind turbine are analyzed, the working principle of each part and its function and significance in the system are explained, and the mathematical model is established according to the relationship between the components. The dual PWM model is presented, and the control strategy of motor side and power side is established on the basis of this model. In order to improve the influence of the wind speed change on the output power of the generator, the Smith predictive compensation method based on the delay link of the wind turbine variable propeller system is proposed, and the fuzzy Smith predictive controller is designed. According to the principle of voltage vector control, the power and current double closed loop motor side control strategy is established, and the problem of output power fluctuation is improved by designing sliding mode controller and on-line self-adjusting quasi-sliding mode controller instead of traditional PI control. The simulation results show that the fuzzy Smith predictive controller and the on-line self-adjusting quasi-sliding mode controller have good effect on restraining the power fluctuation under the varying wind speed and improve the control performance of the direct-drive synchronous generator set.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM315

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