【摘要】：隨著風電技術(shù)的進步,風電系統(tǒng)開始向高效率、大容量方向發(fā)展。對于直驅(qū)永磁同步風力發(fā)電系統(tǒng),一方面,在保證變流器輸出電壓滿足并網(wǎng)需求下,功率變流器較窄的調(diào)壓范圍直接限制風力機的轉(zhuǎn)速范圍,進而降低了風力機在寬風速范圍的捕風效率;另一方面,功率變流器件的容量有限,會限制變流器容量,阻礙風力發(fā)電系統(tǒng)向更大容量發(fā)展。為了增加風力機寬風速范圍的捕風效率和風電系統(tǒng)的單機容量,本文提出一種多直流支路串并組合切換的直驅(qū)永磁風電系統(tǒng)拓撲結(jié)構(gòu)。此拓撲結(jié)構(gòu)采用多支路結(jié)構(gòu)降低各支路電流等級,擴展系統(tǒng)容量;支路串并組合形式可切換,在發(fā)電機低轉(zhuǎn)速時增加串聯(lián)的支路數(shù)、發(fā)電機高轉(zhuǎn)速時降低串聯(lián)的支路數(shù),保證發(fā)電機在寬轉(zhuǎn)速范圍內(nèi)變化時發(fā)電機的母線電壓在較窄的范圍內(nèi)變化,提高了風力機在寬風速范圍的捕風效率。本課題對多支路直驅(qū)永磁同步發(fā)電機進行設計,搭建了發(fā)電機ansoft有限元模型。綜合了二極管的單向?qū)ㄐ院蜆湫瓮負浣Y(jié)構(gòu)容錯性,設計了一種可實現(xiàn)直流支路串并組合切換的拓撲結(jié)構(gòu)。推導了采用串并組合切換結(jié)構(gòu)所能擴展的發(fā)電機轉(zhuǎn)速范圍關(guān)系式,分析了轉(zhuǎn)速范圍連續(xù)性對發(fā)電機和母線電壓變化范圍的約束條件。利用matlab/simulink軟件搭建系統(tǒng)仿真模型,仿真驗證了支路串并連組合切換拓撲結(jié)構(gòu)的實現(xiàn)支路切換和直流支路串并組合擴展發(fā)電機轉(zhuǎn)速的可行性。搭建了多直流支路擴速實驗平臺進一步驗證直流支路串并組合擴展發(fā)電機轉(zhuǎn)速的可行性。
[Abstract]:With the progress of wind power technology, wind power system began to develop in the direction of high efficiency and large capacity. For direct-drive permanent magnet synchronous wind power generation system, on the one hand, under the condition that the output voltage of converter meets the demand of grid connection, the narrow voltage range of power converter directly limits the speed range of wind turbine. Furthermore, the wind capture efficiency of the wind turbine in the wide wind speed range is reduced. On the other hand, the limited capacity of power converter will limit the capacity of converter and hinder the development of wind power system to larger capacity. In order to increase the wind capture efficiency in the wide range of wind speed and the single unit capacity of wind power system, this paper presents a topology of direct-drive permanent magnet wind power system with multi-DC branch series and combined switching. This topology adopts multi-branch structure to reduce the current level of each branch and expand the system capacity. When the generator has low speed, the number of branches in series can be increased, and the number of branches in series can be reduced when the speed of generator is high. When the generator changes in the wide speed range, the generator bus voltage changes in a narrow range, which improves the wind capture efficiency of the wind turbine in the wide wind speed range. In this paper, the permanent magnet synchronous generator with multi-branch direct drive is designed, and the ansoft finite element model of generator is built. The unidirectional conduction and tree topology fault tolerance of the diodes are synthesised, and a topology structure is designed which can realize the combination switching of the DC branch series. The relationship between the range of generator speed and the continuity of speed range is derived, which can be extended by the series-parallel combined switching structure, and the constraints of the continuity of speed range on the range of generator and bus voltage are analyzed. The simulation model of the system is built by using matlab/simulink software, and the feasibility of branch switching and DC branch string combination combined expansion generator speed is verified by simulation. A multi-DC branch speed expansion experimental platform was built to further verify the feasibility of the DC branch series and combined expansion generator speed.
【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】：TM315

【參考文獻】

相關(guān)期刊論文 前10條

1 沈德昌;;海上風電機組發(fā)展趨勢分析[J];風能;2012年12期

2 王仕韜;呂征宇;王鹿軍;張德華;姚文熙;;永磁風力發(fā)電系統(tǒng)的變拓撲晶閘管整流器控制策略[J];電力系統(tǒng)自動化;2012年14期

3 郭越;王占坤;;中歐海上風電產(chǎn)業(yè)發(fā)展比較[J];中外能源;2011年03期

4 劉其輝;王志明;;雙饋式變速恒頻風力發(fā)電機的無功功率機制及特性研究[J];中國電機工程學報;2011年03期

5 趙爭鳴;鄒高域;;大容量電力電子應用系統(tǒng)及其關(guān)鍵問題綜述[J];大功率變流技術(shù);2010年02期

6 薛玉石;韓力;李輝;;直驅(qū)永磁同步風力發(fā)電機組研究現(xiàn)狀與發(fā)展前景[J];電機與控制應用;2008年04期

7 衛(wèi)蜀作;蔡悹;;中國電網(wǎng)高速發(fā)展與可再生能源發(fā)電的關(guān)系[J];電網(wǎng)技術(shù);2008年05期

8 李建林;高志剛;趙斌;許洪華;;直驅(qū)型風電系統(tǒng)大容量Boost PFC拓撲及控制方法[J];電工技術(shù)學報;2008年01期

9 劉其輝;賀益康;張建華;;并網(wǎng)型交流勵磁變速恒頻風力發(fā)電系統(tǒng)控制研究[J];中國電機工程學報;2006年23期

10 李亞西 ,武鑫 ,趙斌 ,許洪華;世界風力發(fā)電現(xiàn)狀及發(fā)展趨勢[J];太陽能;2004年01期

，

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