【摘要】：實(shí)現(xiàn)最大功率追蹤(MPPT)和變速恒頻(VSCF)是風(fēng)力發(fā)電的兩個(gè)根本問(wèn)題。本文以混合驅(qū)動(dòng)型永磁風(fēng)力發(fā)電機(jī)為研究對(duì)象,研究了該類型的風(fēng)力機(jī)實(shí)現(xiàn)上述兩個(gè)關(guān)鍵技術(shù)的非線性動(dòng)力學(xué)與控制問(wèn)題,完成了如下的工作:首先,建立了混合驅(qū)動(dòng)永磁伺服電機(jī)永磁氣隙-氣動(dòng)雙耦合的非線性模型,分析了參數(shù)變化時(shí),系統(tǒng)出現(xiàn)混沌現(xiàn)象的發(fā)生機(jī)理與發(fā)生條件,設(shè)計(jì)了無(wú)源控制器,以實(shí)現(xiàn)消除混沌運(yùn)動(dòng)的目的。其次,建立了以混合驅(qū)動(dòng)系統(tǒng)為核心的考慮聯(lián)軸器剛度和阻尼的動(dòng)力學(xué)模型。在此基礎(chǔ)上,進(jìn)一步研究建立了空氣動(dòng)力學(xué)模型、主發(fā)電機(jī)模型、永磁伺服電機(jī)控制模型、風(fēng)速模型、槳距角控制系統(tǒng)模型等。為了簡(jiǎn)化問(wèn)題,突出空氣動(dòng)力學(xué)的非線性特性,其余模型均通過(guò)簡(jiǎn)化分析與假設(shè)建立了線性模型,只保留空氣動(dòng)力學(xué)非線性特性,得到了整體混合驅(qū)動(dòng)發(fā)電系統(tǒng)的非線性模型。第三,針對(duì)上述系統(tǒng)非線性模型,運(yùn)用模糊控制的知識(shí),提出了高風(fēng)速時(shí)功率平衡的控制策略,并設(shè)計(jì)了模糊PID控制器,仿真結(jié)果表明控制系統(tǒng)很好的實(shí)現(xiàn)了控制目標(biāo)。第四,基于反饋線性化控制理論,設(shè)計(jì)了混合驅(qū)動(dòng)永磁風(fēng)力機(jī)系統(tǒng)非線性方程的反饋線性化模型,并求出最終的非線性反饋控制律,仿真結(jié)果表明控制系統(tǒng)實(shí)現(xiàn)了系統(tǒng)的控制目標(biāo)。
[Abstract]:The realization of maximum power tracking (MPPT) and variable speed constant frequency (VSCF) are two fundamental problems of wind power generation. In this paper, the nonlinear dynamics and control of the hybrid driven permanent magnet wind turbine are studied. Firstly, the following works are done: firstly, the nonlinear dynamics and control of the two key technologies mentioned above are studied. A nonlinear model of permanent magnet air gap-pneumatic dual coupling with hybrid drive permanent magnet servo motor is established. The mechanism and conditions of chaos in the system are analyzed when the parameters change, and the passive controller is designed. In order to achieve the purpose of eliminating chaotic motion. Secondly, a dynamic model considering coupling stiffness and damping based on hybrid drive system is established. On this basis, the aerodynamic model, the main generator model, the permanent magnet servo motor control model, the wind speed model, the pitch angle control system model and so on are further studied and established. In order to simplify the problem and highlight the nonlinear characteristics of aerodynamics, the linear models are established by simplifying the analysis and assumptions, and only the nonlinear characteristics of aerodynamics are retained, and the nonlinear models of the whole hybrid drive power generation system are obtained. Thirdly, according to the nonlinear model of the above-mentioned system, the control strategy of power balance at high wind speed is proposed by using the knowledge of fuzzy control, and the fuzzy PID controller is designed. The simulation results show that the control system achieves the control objective very well. Fourthly, based on the feedback linearization control theory, the feedback linearization model of the nonlinear equation of the hybrid drive permanent magnet wind turbine system is designed, and the final nonlinear feedback control law is obtained. The simulation results show that the control system realizes the control goal of the system.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP273;TM315

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本文編號(hào)：2436446