發(fā)布時(shí)間：2018-09-09 16:33

【摘要】：隨著電力電子技術(shù)的快速發(fā)展,電網(wǎng)中的敏感負(fù)荷日益增多,電力用戶對(duì)電能質(zhì)量的要求也越來(lái)越高。電能質(zhì)量的保障是電網(wǎng)安全經(jīng)濟(jì)生產(chǎn)的前提,而電壓暫降則是電網(wǎng)中頻發(fā)的電能質(zhì)量問(wèn)題,波及范圍廣,危害程度高。目前,動(dòng)態(tài)電壓恢復(fù)器是抑制電壓暫降問(wèn)題的最有效的手段之一。首先,本文根據(jù)動(dòng)態(tài)電壓恢復(fù)器的工作原理,對(duì)動(dòng)態(tài)電壓恢復(fù)器拓?fù)浣Y(jié)構(gòu)進(jìn)行了研究。其中,主要介紹了動(dòng)態(tài)電壓恢復(fù)器的幾種典型拓?fù)?并分析不同類型的拓?fù)涞奶攸c(diǎn)及應(yīng)用場(chǎng)合。在此基礎(chǔ)上,對(duì)動(dòng)態(tài)動(dòng)態(tài)電壓恢復(fù)器進(jìn)行數(shù)學(xué)描述,建立相應(yīng)的數(shù)學(xué)模型,從而得到動(dòng)態(tài)電壓恢復(fù)器的等效傳遞函數(shù)。其次,在電壓檢測(cè)方面,采用基于求導(dǎo)法的單相αβ-dq派克變換電壓幅值和相角的檢測(cè)方法,這種算法適用于單相電壓的檢測(cè),計(jì)算量較小。在正負(fù)零序電壓的分離方面,基于雙向旋轉(zhuǎn)的派克變換對(duì)正負(fù)序分離進(jìn)行了分離,對(duì)于零序分離采用了三相疊加法。在鎖相技術(shù)方面,分別對(duì)開(kāi)環(huán)鎖相和閉環(huán)鎖相技術(shù)原理進(jìn)行了分析。然后,對(duì)于動(dòng)態(tài)電壓恢復(fù)器的控制回路,采用比例諧振控制器控制下的復(fù)合控制策略,通過(guò)該控制策略的頻域特性曲線,分析了該控制策略的優(yōu)點(diǎn)。同時(shí),對(duì)比例諧振控制器進(jìn)行了改進(jìn),使其選頻特性更加靈活,從而具有諧波補(bǔ)償功能。最后,通過(guò)MATLAB/Simulink建模仿真,在復(fù)合控制策略的基礎(chǔ)上,分別對(duì)電網(wǎng)電壓跌落、相位移動(dòng)、諧波干擾等的補(bǔ)償問(wèn)題進(jìn)行了模擬實(shí)驗(yàn),驗(yàn)證了該控制策略的合理性。與此同時(shí),結(jié)合實(shí)際工程的DVR應(yīng)用現(xiàn)狀,說(shuō)明DVR在實(shí)際抑制電壓暫降問(wèn)題的實(shí)用型和經(jīng)濟(jì)性。
[Abstract]:With the rapid development of power electronics technology, the sensitive load in power grid is increasing day by day. The guarantee of power quality is the premise of safe and economical production of power grid, and voltage sag is a frequent power quality problem in the power network, which has a wide range of spread and high degree of harm. At present, dynamic voltage restorer is one of the most effective methods to restrain voltage sag. Firstly, according to the principle of dynamic voltage restorer, the topology of dynamic voltage restorer is studied. Among them, several typical topologies of dynamic voltage restorer are introduced, and the characteristics and applications of different types of topologies are analyzed. On this basis, the mathematical description of the dynamic voltage restorer is carried out, and the corresponding mathematical model is established, and the equivalent transfer function of the dynamic voltage restorer is obtained. Secondly, in the aspect of voltage detection, the single-phase 偽 尾 -dq Parker transform voltage amplitude and phase angle detection method based on the derivation method is adopted. This algorithm is suitable for the detection of single-phase voltage, and the calculation is relatively small. For the separation of positive and negative zero-sequence voltages, the positive-negative sequence separation is separated based on the bidirectional rotation Pike transform, and the three-phase superposition method is used for the zero-sequence separation. In the aspect of phase locking technology, the principle of open loop phase locking and closed loop phase locking are analyzed respectively. Then, for the control loop of dynamic voltage restorer, the compound control strategy under the control of proportional resonance controller is adopted, and the advantages of the control strategy are analyzed through the frequency domain characteristic curve of the control strategy. At the same time, the proportional resonance controller is improved to make its frequency selection more flexible, so it has harmonic compensation function. Finally, through MATLAB/Simulink modeling and simulation, based on the compound control strategy, the simulation experiments of voltage drop, phase shift and harmonic interference compensation are carried out respectively, and the rationality of the control strategy is verified. At the same time, combined with the application status of DVR in practical engineering, the practical and economical application of DVR in restraining voltage sag is demonstrated.
【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】：2017
【分類號(hào)】：TM714.2;TM761

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 郭春林;劉裕昆;肖湘寧;孫哲;;三單相型DVR的分析方法和補(bǔ)償策略[J];電力自動(dòng)化設(shè)備;2011年12期

2 黨存祿;嚴(yán)捚;張曉英;;基于軟件鎖相環(huán)的動(dòng)態(tài)電壓恢復(fù)器補(bǔ)償策略[J];電力自動(dòng)化設(shè)備;2010年11期

3 郝曉弘;房善新;陳偉;;動(dòng)態(tài)電壓恢復(fù)器控制策略的研究與仿真[J];工業(yè)儀表與自動(dòng)化裝置;2010年05期

4 白月飛;麻勝利;陳學(xué)奎;;現(xiàn)代電能質(zhì)量控制技術(shù)[J];現(xiàn)代制造技術(shù)與裝備;2009年05期

5 任永峰;李含善;李建林;許洪華;;統(tǒng)一電能質(zhì)量控制器的建模與仿真[J];電力系統(tǒng)及其自動(dòng)化學(xué)報(bào);2009年04期

6 朱俊星;姜新建;黃立培;;基于飛輪儲(chǔ)能的動(dòng)態(tài)電壓恢復(fù)器補(bǔ)償策略的研究[J];電工電能新技術(shù);2009年01期

7 葛長(zhǎng)宏;程浩忠;王霄樺;鐘明明;陳國(guó)棟;繆勇;董祖毅;;基于最小能量法的DVR控制算法[J];電力自動(dòng)化設(shè)備;2009年01期

8 曹偉;盧子廣;伍健;;基于MATLAB/Simulink的DVR同相位補(bǔ)償策略的仿真研究[J];裝備制造技術(shù);2008年10期

9 周林;吳紅春;孟婧;徐會(huì)亮;馬永強(qiáng);;電壓暫降分析方法研究[J];高電壓技術(shù);2008年05期

10 林繼如;尹忠東;顏全清;;基于超導(dǎo)儲(chǔ)能的動(dòng)態(tài)電壓恢復(fù)器的研究[J];高電壓技術(shù);2008年03期

相關(guān)碩士學(xué)位論文 前2條

1 范永宇;動(dòng)態(tài)電壓恢復(fù)器的直流儲(chǔ)能系統(tǒng)關(guān)鍵技術(shù)研究[D];華中科技大學(xué);2011年

2 申科;級(jí)聯(lián)型多電平動(dòng)態(tài)電壓恢復(fù)器的研究[D];哈爾濱工業(yè)大學(xué);2009年

，

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