雙三電平變流器饋電的開繞組BDFG直接功率控制研究
發(fā)布時間：2018-10-29 23:08
【摘要】：近年來,在我國經濟迅速發(fā)展的背景下,能源需求量不斷增大,傳統(tǒng)的化石資源又存在利用率不足以及開采過度等問題。風能作為在地表大量存在的清潔型可再生能源,在國內外受到了廣泛關注。目前在風力發(fā)電系統(tǒng)中主要采用永磁同步發(fā)電機和雙饋感應發(fā)電機,前者存在需要全功率變流、成本高等問題,后者存在需要定期維護、控制方法復雜等問題。無刷雙饋發(fā)電機則是一種低成本且不需要頻繁維護的新型發(fā)電機,特別適合應用在風力發(fā)電系統(tǒng)中。本文以國家自然科學基金項目“復合轉子開繞組無刷雙饋風力發(fā)電機及其直接功率控制策略”(項目批準號:51277124)為背景,以開繞組無刷雙饋發(fā)電機為研究對象,提出研究一種基于開繞組雙三電平變流器饋電的直接功率控制方法,以實現開繞組無刷雙饋風力發(fā)電機系統(tǒng)的功率跟蹤控制。本文在以下方面進行重點研究:首先,分析了無刷雙饋發(fā)電機的工作原理及其三種運行方式,對在三種運行模式下的繞組間功率流向問題進行了深入研究。在此基礎上,建立了無刷雙饋發(fā)電機在旋轉坐標系下的數學模型,并搭建了仿真模型對其運行性能進行了仿真研究。其次,將無刷雙饋發(fā)電機的控制繞組設計成開繞組結構,兩端分別與一個三電平變流器相連。針對這種拓撲結構,提出采用直接功率控制方法,以實現功率跟蹤控制。該種控制方法具有功率響應速度快,不需要復雜的坐標變換,計算量小等優(yōu)點。此外分析了開繞組無刷雙饋發(fā)電機系統(tǒng)中雙三電平變流器輸出的空間電壓矢量,并進行了比較,為直接功率控制系統(tǒng)的設計和空間電壓矢量選擇表的重新制定提出依據。最后,根據雙三電平變流器輸出電壓矢量的不同特點,對直接功率控制方法進行改進,分別對12扇區(qū)、24扇區(qū)和不對稱36扇區(qū)三種不同扇區(qū)劃分方法下基于功率誤差比較的直接功率控制方法進行設計和對比分析。在Matlab/Simulink環(huán)境下,對基于三種扇區(qū)劃分方法的開繞組無刷雙饋風力發(fā)電機直接功率控制系統(tǒng)在轉速和功率給定發(fā)生變化時的三種運行方式進行仿真研究,并對三種方法在控制精度、功率波動等方面的控制效果進行對比分析。仿真結果表明這三種方法均可滿足對有功功率和無功功率的控制要求,并可根據不同的應用環(huán)境選擇不同的方法。
[Abstract]:In recent years, under the background of rapid economic development in China, the energy demand is increasing, and the traditional fossil resources have some problems, such as insufficient utilization ratio and over-exploitation. Wind energy, as a kind of clean renewable energy, has been paid more and more attention at home and abroad. At present, permanent magnet synchronous generator (PMSG) and doubly-fed induction generator (DFI) are mainly used in wind power generation system. The former has the problems of full power conversion and high cost, while the latter needs regular maintenance and complex control methods. Brushless doubly-fed generator is a new type of generator with low cost and no frequent maintenance. It is especially suitable for wind power generation system. In this paper, taking the project of National Natural Science Foundation, "Brushless Doubly-fed Wind Generator with compound rotor Open Winding and its Direct Power Control Strategy" (Project Grant No. 51277124) as the background, the open winding brushless doubly-fed generator is taken as the research object. A direct power control method based on open-winding double-three-level converter feed is proposed to realize the power tracking control of open-winding brushless doubly-fed wind turbine system. This paper focuses on the following aspects: firstly, the working principle and three operation modes of the brushless doubly-fed generator are analyzed, and the power flow direction between the windings under the three operation modes is deeply studied. On this basis, the mathematical model of brushless doubly-fed generator in rotating coordinate system is established, and the simulation model is built to study the performance of brushless doubly-fed generator. Secondly, the control windings of the brushless doubly-fed generator are designed as open windings, each of which is connected to a three-level converter. Aiming at this topology, a direct power control method is proposed to realize power tracking control. This control method has the advantages of fast power response, no complicated coordinate transformation and less computation. In addition, the output space voltage vector of the double three-level converter in the open-winding brushless doubly-fed generator system is analyzed and compared, which provides the basis for the design of the direct power control system and the reformulation of the space voltage vector selection table. Finally, according to the different characteristics of the output voltage vector of the two-three-level converter, the direct power control method is improved. The direct power control method based on power error comparison is designed and compared with three different sector partitioning methods for 24 sector and asymmetric 36 sectors. In Matlab/Simulink environment, three operation modes of the direct power control system of open-winding brushless doubly-fed wind turbine based on three sector partition methods are simulated when the speed and power are given. The control effect of the three methods in the aspects of control precision and power fluctuation is compared and analyzed. The simulation results show that the three methods can meet the control requirements of active power and reactive power, and can choose different methods according to different application environments.
【學位授予單位】：沈陽工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM46;TM315
本文編號：2299108
[Abstract]:In recent years, under the background of rapid economic development in China, the energy demand is increasing, and the traditional fossil resources have some problems, such as insufficient utilization ratio and over-exploitation. Wind energy, as a kind of clean renewable energy, has been paid more and more attention at home and abroad. At present, permanent magnet synchronous generator (PMSG) and doubly-fed induction generator (DFI) are mainly used in wind power generation system. The former has the problems of full power conversion and high cost, while the latter needs regular maintenance and complex control methods. Brushless doubly-fed generator is a new type of generator with low cost and no frequent maintenance. It is especially suitable for wind power generation system. In this paper, taking the project of National Natural Science Foundation, "Brushless Doubly-fed Wind Generator with compound rotor Open Winding and its Direct Power Control Strategy" (Project Grant No. 51277124) as the background, the open winding brushless doubly-fed generator is taken as the research object. A direct power control method based on open-winding double-three-level converter feed is proposed to realize the power tracking control of open-winding brushless doubly-fed wind turbine system. This paper focuses on the following aspects: firstly, the working principle and three operation modes of the brushless doubly-fed generator are analyzed, and the power flow direction between the windings under the three operation modes is deeply studied. On this basis, the mathematical model of brushless doubly-fed generator in rotating coordinate system is established, and the simulation model is built to study the performance of brushless doubly-fed generator. Secondly, the control windings of the brushless doubly-fed generator are designed as open windings, each of which is connected to a three-level converter. Aiming at this topology, a direct power control method is proposed to realize power tracking control. This control method has the advantages of fast power response, no complicated coordinate transformation and less computation. In addition, the output space voltage vector of the double three-level converter in the open-winding brushless doubly-fed generator system is analyzed and compared, which provides the basis for the design of the direct power control system and the reformulation of the space voltage vector selection table. Finally, according to the different characteristics of the output voltage vector of the two-three-level converter, the direct power control method is improved. The direct power control method based on power error comparison is designed and compared with three different sector partitioning methods for 24 sector and asymmetric 36 sectors. In Matlab/Simulink environment, three operation modes of the direct power control system of open-winding brushless doubly-fed wind turbine based on three sector partition methods are simulated when the speed and power are given. The control effect of the three methods in the aspects of control precision and power fluctuation is compared and analyzed. The simulation results show that the three methods can meet the control requirements of active power and reactive power, and can choose different methods according to different application environments.
【學位授予單位】：沈陽工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM46;TM315
【參考文獻】
相關期刊論文 前10條
1 錢坤;莫岳平;馬瑞;孫歡歡;;無刷雙饋電機的發(fā)展及其結構原理應用綜述[J];電工電氣;2016年07期
2 徐帥;張建忠;;多電平電壓源型逆變器的容錯技術綜述[J];電工技術學報;2015年21期
3 張岳;王鳳翔;;磁障轉子無刷雙饋電機運行特性及實驗研究[J];電機與控制學報;2014年02期
4 鄒宇;向鳳紅;王劍平;張果;王剛;;交流電機控制策略研究進展[J];電機與控制應用;2013年03期
5 李寧;王躍;雷萬鈞;王兆安;;電力電子變流器中的直接功率控制策略研究綜述[J];電源學報;2013年01期
6 齊放;劉亞非;梁亮;李海峰;孟繼周;;美國分布式風力發(fā)電政策研究及啟示[J];能源技術經濟;2012年02期
7 隋廣洲;弓滿鋒;;三相整流器直接功率控制方法研究[J];湛江師范學院學報;2011年03期
8 程啟明;程尹曼;王映斐;汪明媚;;交流電機控制策略的發(fā)展綜述[J];電力系統(tǒng)保護與控制;2011年09期
9 歐陽金鑫;熊小伏;;接入配電網的雙饋風力發(fā)電機短路電流特性及影響[J];電力系統(tǒng)自動化;2010年23期
10 陳蕊;;多電平變換器的發(fā)展及現狀[J];蕪湖職業(yè)技術學院學報;2010年02期
，本文編號：2299108
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