本文選題：變速恒頻　切入點(diǎn)：雙饋電機(jī)　出處：《安徽理工大學(xué)》2014年碩士論文

【摘要】：在風(fēng)力發(fā)電領(lǐng)域,變速恒頻(Variable-Speed Constant-Frequency,簡稱VSCF)發(fā)電系統(tǒng)有著顯著的優(yōu)越性和廣闊的應(yīng)用前景。在雙饋型變速恒頻風(fēng)力發(fā)電系統(tǒng)中,雙饋電機(jī)(Double-Fed Induction Generator,簡稱DFIG)轉(zhuǎn)子側(cè)的電源功率變換器是實(shí)現(xiàn)風(fēng)力發(fā)電機(jī)組最大風(fēng)能追蹤、控制輸出有功無功功率解耦、提高風(fēng)力發(fā)電機(jī)組運(yùn)行效率的關(guān)鍵。矩陣變換器(Matrix Converter,簡稱MC)是一種新型拓?fù)浣Y(jié)構(gòu)的變頻裝置,它不僅具有輸入功率因數(shù)可調(diào)、輸出電壓可調(diào)、輸出電流諧波少、能夠?qū)崿F(xiàn)四象限運(yùn)行等優(yōu)點(diǎn),而且其結(jié)構(gòu)緊湊,系統(tǒng)成本較低。與傳統(tǒng)的交-直-交變換器相比,無中間直流環(huán)節(jié)及相應(yīng)的儲能電容,使得體積減小,動態(tài)響應(yīng)提高。鑒于以上優(yōu)點(diǎn),本課題將雙級交-交矩陣變換器(Two-Stage Matrix Converter,簡稱TSMC)作為雙饋風(fēng)力發(fā)電系統(tǒng)的功率勵磁變換器。 首先,本課題介紹了變速恒頻系統(tǒng)運(yùn)行的基本原理,并推導(dǎo)出DFIG的數(shù)學(xué)模型。對DFIG轉(zhuǎn)子側(cè)的交流勵磁電源MC的拓樸結(jié)構(gòu),給出了矩陣變換器虛擬等效電路,依次介紹了Venturini直接法、瞬時(shí)電壓法、空間矢量調(diào)制法等調(diào)制方法,經(jīng)過對比最終確定采用間接空間矢量調(diào)制法調(diào)制各個(gè)開關(guān)對應(yīng)的空間矢量。 其次,本課題研究了基于TSMC勵磁的雙饋風(fēng)力發(fā)電系統(tǒng)的控制策略。在對矢量控制思想進(jìn)行分析的基礎(chǔ)上提出了一種基于TSMC的雙饋風(fēng)力發(fā)電系統(tǒng)的控制策略,控制系統(tǒng)包括功率外環(huán)、電流內(nèi)環(huán)雙閉環(huán)控制結(jié)構(gòu),實(shí)現(xiàn)了發(fā)電系統(tǒng)定子輸出有功功率和無功功率的解耦控制,并采用最大風(fēng)能追蹤控制策略,在不同風(fēng)速下實(shí)現(xiàn)風(fēng)能的最大化利用。 最后,利用MATLAB/SIMULINK仿真軟件,搭建了整個(gè)系統(tǒng)的仿真模型,并對實(shí)驗(yàn)仿真結(jié)果進(jìn)行了分析。仿真結(jié)果表明,基于TSMC勵磁的變速恒頻雙饋風(fēng)力發(fā)電系統(tǒng)具有良好的穩(wěn)、動態(tài)運(yùn)行特性,輸出可以實(shí)現(xiàn)有功、無功功率的解耦控制,且能夠輸出高質(zhì)量的電能。最終驗(yàn)證了所提出控制系統(tǒng)方案的準(zhǔn)確性和有效性。在此基礎(chǔ)上,本課題采用TMS320F28335和EMP9320LC84-15作為控制芯片,設(shè)計(jì)出了控制系統(tǒng)的主功率電路、采樣電路、驅(qū)動電路、過壓吸收電路等。
[Abstract]:In the field of wind power generation, Variable-Speed Constant-Frequency (VSCF) power generation system has obvious advantages and broad application prospects.In the doubly-fed variable speed constant frequency wind power generation system, the double-fed double-fed Induction generator (DFIGG) rotor side power converter is used to realize the maximum wind power tracking of the wind turbine and to control the decoupling of the output active and reactive power.The key to improve the efficiency of wind turbine.Matrix Converter (MCV) is a new type of converter with topological structure. It not only has the advantages of adjustable input power factor, adjustable output voltage, less harmonic output current, but also can realize four-quadrant operation, and its structure is compact.The system cost is lower.Compared with the conventional AC-DC-AC converter, the volume of the converter is reduced and the dynamic response is improved without the intermediate DC link and the corresponding energy storage capacitance.In view of the above advantages, the two-stage AC-AC matrix converter / Two-Stage Matrix converter (TSMC) is used as the power excitation converter in the doubly-fed wind power generation system.Firstly, the basic principle of variable speed constant frequency system is introduced, and the mathematical model of DFIG is deduced.For the topology of AC excitation power supply MC in DFIG rotor side, the virtual equivalent circuit of matrix converter is given. The modulation methods such as Venturini direct method, instantaneous voltage method and space vector modulation method are introduced in turn.After comparison, the indirect space vector modulation method is used to modulate the space vector corresponding to each switch.Secondly, the control strategy of doubly-fed wind power system based on TSMC excitation is studied.Based on the analysis of vector control theory, a control strategy of doubly-fed wind power generation system based on TSMC is proposed. The control system consists of power outer loop and current inner loop double closed loop control structure.Decoupling control of stator output active power and reactive power is realized, and the maximum wind energy tracking control strategy is adopted to maximize the utilization of wind energy under different wind speeds.Finally, the simulation model of the whole system is built by using MATLAB/SIMULINK software, and the simulation results of the experiment are analyzed.The simulation results show that the variable speed constant frequency doubly-fed wind power generation system based on TSMC excitation has good stability, dynamic operating characteristics, output can realize active and reactive power decoupling control, and can output high quality electric energy.Finally, the accuracy and validity of the proposed control system are verified.On this basis, the main power circuit, sampling circuit, driving circuit and overvoltage absorption circuit of the control system are designed by using TMS320F28335 and EMP9320LC84-15 as the control chip.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM614

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 湯寧平,王建寬,吳漢光;矩陣變換器的SPWM控制技術(shù)及其實(shí)現(xiàn)[J];電工技術(shù)學(xué)報(bào);2003年04期

2 張華強(qiáng),王立國,徐殿國,苗立杰,劉彤彥,馬沖慧;矩陣式電力變換器的控制策略綜述[J];電機(jī)與控制學(xué)報(bào);2004年03期

3 朱曉峰,徐福媛,黃立培;矩陣式變換器的穩(wěn)態(tài)網(wǎng)側(cè)性能分析[J];電力電子技術(shù);2004年06期

4 粟梅;余岳;覃恒思;桂衛(wèi)華;;基于DSP+CPLD的雙級矩陣變換器設(shè)計(jì)與實(shí)現(xiàn)[J];電力電子技術(shù);2007年06期

5 李輝;陽春華;鄧文浪;劉金強(qiáng);;基于DSP28335的矩陣變換器控制系統(tǒng)研究[J];電氣傳動自動化;2011年03期

6 劉紅兵;;矩陣變換器交流調(diào)速系統(tǒng)組合控制策略的研究[J];電氣開關(guān);2011年02期

7 曾志勇;王清靈;馮婧;;變速恒頻風(fēng)力發(fā)電系統(tǒng)最大風(fēng)能追蹤控制[J];電氣自動化;2008年06期

8 王超;張懷宇;王辛慧;李天柱;;風(fēng)力發(fā)電技術(shù)及其發(fā)展方向[J];電站系統(tǒng)工程;2006年02期

9 陳t熁，

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