本文選題：風(fēng)力發(fā)電　切入點(diǎn)：隨機(jī)切換　出處：《新疆大學(xué)》2017年碩士論文

【摘要】：隨著世界能源危機(jī)的加劇以及環(huán)境污染的日益加重,人們開始尋找清潔環(huán)保的可再生能源去代替常規(guī)的化石能源.目前,在眾多新型可再生能源中,開發(fā)利用風(fēng)能發(fā)電是相對(duì)成熟的技術(shù),適用于大規(guī)模的商業(yè)開發(fā),因此風(fēng)能作為一種綠色能源,在可再生能源領(lǐng)域內(nèi)得到了迅猛發(fā)展.隨著風(fēng)電裝機(jī)容量在整個(gè)電力系統(tǒng)的比重逐漸增大,風(fēng)電機(jī)組的運(yùn)行性能優(yōu)劣和電能質(zhì)量?jī)?yōu)劣對(duì)電網(wǎng)產(chǎn)生的影響,目前越來(lái)越受到世界的廣泛關(guān)注.本文以風(fēng)力發(fā)電系統(tǒng)中的永磁同步風(fēng)力發(fā)電機(jī)風(fēng)速隨機(jī)切換系統(tǒng)的數(shù)學(xué)模型和電網(wǎng)側(cè)變流器的數(shù)學(xué)模型為基礎(chǔ)展開了研究,討論了滑模變結(jié)構(gòu)控制器對(duì)風(fēng)速隨機(jī)切換系統(tǒng)中的電機(jī)轉(zhuǎn)速、有功和無(wú)功電流的高精度控制,變流器開關(guān)組變流過(guò)程對(duì)電流的非線性隨機(jī)噪聲擾動(dòng)和非線性脈沖擾動(dòng)的控制.本文主要內(nèi)容概括如下:1.第一節(jié),介紹了風(fēng)力發(fā)電的研究背景.其次,給出了風(fēng)力發(fā)電相關(guān)的發(fā)展研究現(xiàn)狀及其運(yùn)行原理.最后,給出了本篇文章的主要工作.2.第二節(jié),主要討論為了實(shí)現(xiàn)在風(fēng)速隨機(jī)切換下對(duì)電機(jī)轉(zhuǎn)速、有功和無(wú)功電流的高精度控制,本文提出了風(fēng)速隨機(jī)切換永磁同步風(fēng)力發(fā)電機(jī)的積分型滑模變結(jié)構(gòu)控制的平滑控制策略.在Matlab/Simulink仿真環(huán)境下搭建了系統(tǒng)模型.結(jié)果表明,所提方法能夠有效降低風(fēng)速的隨機(jī)切換以及負(fù)載擾動(dòng)對(duì)直驅(qū)永磁同步風(fēng)力發(fā)電機(jī)輸出電流的擾動(dòng).3.第三節(jié),本節(jié)研究了風(fēng)力發(fā)電并網(wǎng)中帶有非線性隨機(jī)噪聲擾動(dòng)的同步控制問(wèn)題.利用基爾霍夫定律得到了風(fēng)力發(fā)電系統(tǒng)電網(wǎng)側(cè)變流器的數(shù)學(xué)模型.設(shè)計(jì)了適當(dāng)?shù)姆答佂娇刂破?借助李雅普洛夫穩(wěn)定性理論,驗(yàn)證了該同步控制器的有效性.進(jìn)一步有效抑制由于電流并網(wǎng)產(chǎn)生的非線性隨機(jī)擾動(dòng),使得風(fēng)力發(fā)電機(jī)所產(chǎn)生的電流和電網(wǎng)所產(chǎn)生的電流同步.最后通過(guò)Matlab中的Simulink進(jìn)行了仿真設(shè)計(jì)研究,驗(yàn)證了該理論結(jié)果的有效性.4.第四節(jié),在第三節(jié)的基礎(chǔ)上研究了大功率風(fēng)力發(fā)電并網(wǎng)中帶非線性脈沖擾動(dòng)的同步控制問(wèn)題,設(shè)計(jì)了適當(dāng)?shù)姆答佂娇刂破?借助李雅普洛夫穩(wěn)定性理論,驗(yàn)證了該同步控制器的有效性,針對(duì)所研究的問(wèn)題給出了相應(yīng)的算法.最后通過(guò)Matlab中的Simulink進(jìn)行了仿真設(shè)計(jì)研究,驗(yàn)證了該理論結(jié)果的有效性.
[Abstract]:With the aggravation of the world energy crisis and the increasing pollution of the environment, people begin to look for the clean and environmentally friendly renewable energy to replace the conventional fossil energy. At present, among the many new types of renewable energy, Wind power generation is a relatively mature technology for large-scale commercial development, so wind energy as a green energy, With the increasing proportion of wind power installed capacity in the whole power system, the operation performance and power quality of wind turbine have a great impact on the power network. At present, more and more attention has been paid to the wind power system in the world. Based on the mathematical model of wind speed random switching system of permanent magnet synchronous wind generator and the mathematical model of grid-side converter in wind power generation system, The high precision control of motor speed, active power and reactive current in wind speed random switching system by sliding mode variable structure controller is discussed. The control of nonlinear random noise disturbance and nonlinear impulse disturbance of current in converter switching system. The main contents of this paper are summarized as follows: 1. The first section introduces the research background of wind power generation. The research status and operation principle of wind power generation are given. Finally, the main work of this paper .2. the second section, mainly discusses the speed of the motor under the wind speed random switching. In this paper, a smooth control strategy of integrated sliding mode variable structure control for wind speed random switching permanent magnet synchronous wind generator is proposed. The system model is built in Matlab/Simulink simulation environment. The proposed method can effectively reduce the random switching of wind speed and the disturbance of load disturbance to the output current of direct-drive permanent magnet synchronous wind generator. In this section, the synchronization control problem with nonlinear random noise disturbance in wind power grid is studied. By using Kirchhoff's law, the mathematical model of grid-side converter in wind power generation system is obtained, and an appropriate feedback synchronous controller is designed. The validity of the synchronization controller is verified by using the Lyapunov stability theory, and the nonlinear random disturbance caused by the current connected to the grid is further effectively suppressed. The current generated by the wind turbine is synchronized with the current generated by the power grid. Finally, the simulation design of the wind turbine generator and the current generated by the grid is carried out through the Simulink in Matlab, which verifies the validity of the theoretical results. On the basis of the third section, the synchronization control problem with nonlinear impulse disturbance in high power wind power generation grid is studied, and an appropriate feedback synchronization controller is designed, with the aid of Lyapunov stability theory. The validity of the synchronization controller is verified, and the corresponding algorithm is given. Finally, the validity of the theoretical results is verified by the simulation design of Simulink in Matlab.
【學(xué)位授予單位】：新疆大學(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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