本文選題：風(fēng)力發(fā)電 + 雙饋感應(yīng)發(fā)電機(jī)��； 參考：《華北電力大學(xué)》2014年碩士論文

【摘要】：隨著風(fēng)力發(fā)電行業(yè)的迅猛發(fā)展,風(fēng)力發(fā)電技術(shù)取得了長足的進(jìn)步,雙饋感應(yīng)發(fā)電機(jī)以其變速恒頻運(yùn)行特性、能夠參與系統(tǒng)的無功功率調(diào)節(jié)等一系列優(yōu)勢(shì)得到了越來越多的青睞。然而,目前雙饋機(jī)組的動(dòng)態(tài)數(shù)學(xué)模型不太統(tǒng)一,需要進(jìn)行深入的研究。近年來,風(fēng)電機(jī)組的單機(jī)容量呈不斷增大的趨勢(shì),大容量的風(fēng)電場對(duì)電網(wǎng)的穩(wěn)定性影響凸顯。雙饋風(fēng)電場接入電力系統(tǒng)后會(huì)帶來新的小干擾穩(wěn)定問題。另外,雙饋風(fēng)電機(jī)組具有較為復(fù)雜的控制系統(tǒng),模型階數(shù)較高,在風(fēng)場級(jí)的分析時(shí)會(huì)造成“維數(shù)災(zāi)”,研究如何對(duì)雙饋風(fēng)電機(jī)組的數(shù)學(xué)模型進(jìn)行準(zhǔn)確降階也顯得十分重要。 針對(duì)目前用于靜態(tài)穩(wěn)定分析的雙饋機(jī)組簡化數(shù)學(xué)模型大多不考慮網(wǎng)側(cè)控制動(dòng)態(tài)的情況,本文首先建立了含網(wǎng)側(cè)控制的雙饋風(fēng)電機(jī)組數(shù)學(xué)模型,并對(duì)特征值計(jì)算結(jié)果進(jìn)行了對(duì)比,發(fā)現(xiàn)忽略網(wǎng)側(cè)控制的動(dòng)態(tài)特性會(huì)遺漏部分主導(dǎo)模態(tài)(弱阻尼衰減模態(tài)和振蕩模態(tài)),直接影響小干擾穩(wěn)定分析的計(jì)算結(jié)果的準(zhǔn)確性。 對(duì)于雙饋機(jī)組接入引發(fā)的弱阻尼模態(tài),本文首先計(jì)算其對(duì)系統(tǒng)矩陣的靈敏度,對(duì)靈敏度最高的參數(shù)進(jìn)行優(yōu)化來提高模態(tài)阻尼比,進(jìn)而改善系統(tǒng)小干擾穩(wěn)定性。和傳統(tǒng)的盲目對(duì)所有參數(shù)優(yōu)化方法相比,針對(duì)性強(qiáng),可以大幅減小工作量。 最后,基于所建立的雙饋風(fēng)電機(jī)組詳細(xì)的數(shù)學(xué)模型,本文采用了主導(dǎo)模態(tài)分析法提出了不同運(yùn)行工況下風(fēng)場級(jí)小干擾穩(wěn)定分析雙饋風(fēng)電機(jī)組的降階模型,并采用時(shí)域仿真分析法驗(yàn)證了降階模型的精確性與適用性。
[Abstract]:With the rapid development of wind power industry, wind power generation technology has made great progress, doubly-fed induction generator with its variable speed constant frequency operation characteristics, can participate in the system of reactive power regulation and a series of advantages have been more and more favored. However, the dynamic mathematical model of doubly-fed generating unit is not uniform at present, so it needs to be studied deeply. In recent years, the single unit capacity of wind turbine is increasing, and the influence of large capacity wind farm on the stability of power grid is prominent. When doubly-fed wind farm is connected to power system, it will bring about a new problem of small disturbance stability. In addition, the doubly-fed wind turbine has more complex control system, and the model order is higher, which will cause "dimension disaster" in the analysis of wind field, so it is very important to study how to accurately reduce the order of mathematical model of doubly-fed wind turbine. In view of the fact that most simplified mathematical models of doubly-fed generating units used for static stability analysis do not consider the dynamics of grid-side control, a mathematical model of doubly-fed wind turbines with grid-side control is established in this paper, and the calculation results of eigenvalues are compared. It is found that some dominant modes (weak damping attenuation mode and oscillating mode) will be omitted if the dynamic characteristics of the network side control are ignored, which directly affects the accuracy of the calculation results of the small disturbance stability analysis. For the weakly damped mode induced by the doubly-fed unit, the sensitivity to the system matrix is first calculated, and the parameters with the highest sensitivity are optimized to improve the modal damping ratio and the stability of the system with small disturbance. Compared with the traditional blind optimization method for all parameters, it has strong pertinence and can greatly reduce the workload. Finally, based on the detailed mathematical model of doubly-fed wind turbine, this paper presents a reduced order model for wind field small disturbance stability analysis under different operating conditions by using dominant modal analysis method. The accuracy and applicability of the reduced order model are verified by time domain simulation analysis.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM614

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 胡家兵;賀益康;劉其輝;;基于最佳功率給定的最大風(fēng)能追蹤控制策略[J];電力系統(tǒng)自動(dòng)化;2005年24期

2 尹明;李庚銀;周明;趙成勇;;雙饋感應(yīng)風(fēng)力發(fā)電機(jī)組動(dòng)態(tài)模型的分析與比較(英文)[J];電力系統(tǒng)自動(dòng)化;2006年13期

3 張寶群;張伯明;吳文傳;;基于小干擾穩(wěn)定的雙饋感應(yīng)電機(jī)電磁模型降階分析[J];電力系統(tǒng)自動(dòng)化;2010年10期

4 許寅;陳穎;梅生偉;;風(fēng)力發(fā)電機(jī)組暫態(tài)仿真模型[J];電力系統(tǒng)自動(dòng)化;2011年09期

5 李晶,王偉勝,宋家驊;雙饋感應(yīng)發(fā)電機(jī)的線性化動(dòng)態(tài)模型及運(yùn)行特性分析[J];電網(wǎng)技術(shù);2004年13期

6 藺紅;晁勤;;直驅(qū)永磁同步風(fēng)力發(fā)電系統(tǒng)的降階模型研究[J];電網(wǎng)技術(shù);2012年08期

7 薛桁,朱瑞兆,楊振斌,袁春紅;中國風(fēng)能資源貯量估算[J];太陽能學(xué)報(bào);2001年02期

8 顧和榮;楊子龍;鄔偉揚(yáng);;并網(wǎng)逆變器輸出電流滯環(huán)跟蹤控制技術(shù)研究[J];中國電機(jī)工程學(xué)報(bào);2006年09期

9 王忱;石立寶;姚良忠;王黎明;倪以信;;大規(guī)模雙饋型風(fēng)電場的小擾動(dòng)穩(wěn)定分析[J];中國電機(jī)工程學(xué)報(bào);2010年04期

10 楊黎暉;馬西奎;;雙饋風(fēng)電機(jī)組對(duì)電力系統(tǒng)低頻振蕩特性的影響[J];中國電機(jī)工程學(xué)報(bào);2011年10期

相關(guān)博士學(xué)位論文 前1條

1 郝正航;雙饋風(fēng)電機(jī)組的暫態(tài)行為及其對(duì)電力系統(tǒng)穩(wěn)定性影響[D];天津大學(xué);2011年

，

本文編號(hào)：2085383