本文選題：雙饋異步風(fēng)力發(fā)電機(jī) + Terminal滑模變結(jié)構(gòu)控制��； 參考：《南京理工大學(xué)》2014年碩士論文

【摘要】：雙饋感應(yīng)發(fā)電機(jī)(DFIG)最常見的運(yùn)行方式是變速恒頻運(yùn)行(VSCF),采用雙PWM變頻器控制不僅可以獨(dú)立調(diào)節(jié)發(fā)電機(jī)有功和無功出力,還減少了風(fēng)力資源的浪費(fèi),在穩(wěn)定性方面對(duì)電網(wǎng)有著卓效的貢獻(xiàn)。論文研究了DFIG發(fā)電機(jī)側(cè)和電網(wǎng)側(cè)PWM變換器的控制策略,進(jìn)一步研究了DFIG對(duì)于實(shí)際電網(wǎng)穩(wěn)定性方面的影響。 首先,研究了DFIG的特點(diǎn)、功率關(guān)系、電磁關(guān)系以及變速恒頻運(yùn)行的原理,搭建了DFIG的數(shù)學(xué)模型,為控制策略的研究提供了基礎(chǔ)。 其次,針對(duì)電網(wǎng)側(cè)變換器,研究了其結(jié)構(gòu)和原理,在矢量控制的基礎(chǔ)上,采用快速Terminal滑模變結(jié)構(gòu)控制設(shè)計(jì)了電網(wǎng)側(cè)PWM變換器的電流環(huán)控制策略和電壓環(huán)滑模變結(jié)構(gòu)協(xié)調(diào)控制策略,構(gòu)建了電網(wǎng)側(cè)變換器控制模型,用Matlab建立一個(gè)電網(wǎng)側(cè)變換器仿真系統(tǒng),分析了2種電網(wǎng)側(cè)PWM變換器的工作模式,對(duì)控制器的動(dòng)態(tài)性能和穩(wěn)定性進(jìn)行了擾動(dòng)分析,結(jié)果表明本文的控制策略較傳統(tǒng)控制具有快速、超調(diào)量小、魯棒性強(qiáng)的優(yōu)點(diǎn)。 接下來,研究了DFIG發(fā)電機(jī)側(cè)變換器原理和結(jié)構(gòu),在矢量控制的基礎(chǔ)上,改進(jìn)了傳統(tǒng)滑模變控制器,設(shè)計(jì)了其快速Terminal滑模變結(jié)構(gòu)控制器,通過功率控制實(shí)現(xiàn)最大風(fēng)能跟蹤,設(shè)計(jì)了DFIG機(jī)側(cè)變換器控制模型,用Matlab建立了一個(gè)DFIG發(fā)電機(jī)側(cè)變換器仿真系統(tǒng),研究了DFIG有功、無功獨(dú)立控制效果,研究了DFIG并網(wǎng)前后的穩(wěn)定性,結(jié)果表明本文控制能夠?qū)崿F(xiàn)DFIG有功、無功功率解耦控制,實(shí)現(xiàn)了DFIG變速恒頻運(yùn)行控制。 最后,建立了一個(gè)單機(jī)無窮大系統(tǒng),DFIG通過2個(gè)PWM變換器接入電網(wǎng),在仿真基礎(chǔ)上,驗(yàn)證了快速Terminal滑模變結(jié)構(gòu)控制的雙饋異步風(fēng)力發(fā)電機(jī)的穩(wěn)定效果,研究了DFIG對(duì)電網(wǎng)穩(wěn)定性的影響。在此基礎(chǔ)上,以華東電網(wǎng)為數(shù)據(jù)背景,以實(shí)際如東風(fēng)電場(chǎng)為例分析了DFIG組成的風(fēng)電場(chǎng)對(duì)江蘇電網(wǎng)的影響,結(jié)果表明DFIG組成的風(fēng)電場(chǎng)對(duì)電網(wǎng)的穩(wěn)定性具有積極的作用。
[Abstract]:The most common operation mode of doubly-fed induction generator (DFIGG) is variable speed constant frequency control (VSCF). Using dual PWM inverter control can not only adjust the active and reactive power of generator independently, but also reduce the waste of wind power resource. It has a great contribution to the stability of the power grid. In this paper, the control strategy of DFIG generator side and power side PWM converter is studied, and the influence of DFIG on the power network stability is further studied. Firstly, the characteristics of DFIG, power relation, electromagnetic relation and the principle of variable speed constant frequency operation are studied, and the mathematical model of DFIG is built, which provides a basis for the study of control strategy. Secondly, the structure and principle of grid-side converter are studied. Based on vector control, The current loop control strategy and voltage loop sliding mode variable structure coordinated control strategy of power side PWM converter are designed by using fast terminal sliding mode variable structure control, and the control model of grid side converter is constructed, and a simulation system of power side converter is established by Matlab. The dynamic performance and stability of the controller are analyzed. The results show that the proposed control strategy is faster, less overshoot and more robust than the traditional control. Then, the principle and structure of DFIG generator side converter are studied. On the basis of vector control, the traditional sliding mode variable controller is improved, and its fast terminal sliding mode variable structure controller is designed. The maximum wind energy tracking is realized by power control. The control model of DFIG converter is designed, a simulation system of DFIG generator side converter is established by Matlab, the effect of DFIG active power and reactive power independent control is studied, and the stability of DFIG before and after connected to grid is studied. The results show that the DFIG active power and reactive power decoupling control can be realized in this paper, and the DFIG variable speed constant frequency operation control is realized. Finally, a single-machine infinite bus system named DFIG is established to connect to the power network through two PWM converters. On the basis of simulation, the stable effect of fast terminal sliding mode variable structure control doubly-fed asynchronous wind turbine is verified. The influence of DFIG on power grid stability is studied. On this basis, taking East China Power Grid as the data background and taking the actual Rudong wind farm as an example, the influence of DFIG wind farm on Jiangsu power grid is analyzed. The results show that the DFIG wind farm has a positive effect on the stability of power grid.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM315

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