本文選題：雙饋風(fēng)力發(fā)電 + 電網(wǎng)電壓不對(duì)稱故障�。� 參考：《西安理工大學(xué)》2017年碩士論文

【摘要】：近年來(lái),為了積極應(yīng)對(duì)環(huán)境與能源問(wèn)題,清潔能源-風(fēng)電快速發(fā)展,世界各地電力系統(tǒng)風(fēng)電滲透率不斷提高。由于風(fēng)電占總體發(fā)電系統(tǒng)的份額增大及其并網(wǎng)處易發(fā)故障等問(wèn)題,這就要求風(fēng)力發(fā)電系統(tǒng)能夠抵御故障,維持電網(wǎng)的穩(wěn)定性。風(fēng)力發(fā)電系統(tǒng)中較為頻發(fā)的故障是三相電網(wǎng)電壓的不對(duì)稱。雙饋發(fā)電機(jī)作為目前風(fēng)力發(fā)電場(chǎng)中的主流機(jī)型,占據(jù)風(fēng)電產(chǎn)業(yè)較大比重。而雙饋風(fēng)電系統(tǒng)中雙向變換器的控制策略決定了風(fēng)力發(fā)電機(jī)組的運(yùn)行特性,但其設(shè)計(jì)是建立在電網(wǎng)電壓平衡的基礎(chǔ)上的,故障時(shí)原有的控制措施失效,致使雙饋風(fēng)電系統(tǒng)從電網(wǎng)解列,這將導(dǎo)致大面積的停電,甚至造成巨大損失。因此,就需要研究如何改進(jìn)雙饋風(fēng)電系統(tǒng)的控制策略來(lái)提高其在電網(wǎng)故障時(shí)的并網(wǎng)運(yùn)行能力。本課題以雙饋式風(fēng)力發(fā)電系統(tǒng)為研究對(duì)象,從其主要組成部分DFIG和背靠背式變換器的工作原理入手,建立了關(guān)于雙饋風(fēng)力發(fā)電機(jī)的數(shù)學(xué)模型以及并網(wǎng)變換器的模型和控制方案,并在仿真平臺(tái)中搭建了其整體模型進(jìn)行后面的仿真實(shí)驗(yàn)。在此基礎(chǔ)上,對(duì)電網(wǎng)電壓不對(duì)稱故障進(jìn)行分析,給出故障對(duì)雙饋發(fā)電系統(tǒng)定、轉(zhuǎn)子以及直流母線的影響,在MATLAB/simulink中再現(xiàn)故障電壓,通過(guò)仿真分析故障過(guò)程中各電氣量的變化規(guī)律。其次,給出電網(wǎng)電壓故障時(shí)故障電壓相位的檢測(cè)技術(shù),并針對(duì)在電網(wǎng)電壓不對(duì)稱故障時(shí),由于負(fù)序分量的存在,系統(tǒng)不能很好的穩(wěn)定直流母線電壓,在網(wǎng)側(cè)變換器采用比例諧振控制策略代替?zhèn)鹘y(tǒng)的矢量控制,給出控制算法原理以及實(shí)現(xiàn)框圖,并在仿真軟件中對(duì)其控制效果進(jìn)行了仿真實(shí)驗(yàn)和結(jié)果分析,驗(yàn)證了比例諧振控制策略能有效抑制故障時(shí)直流母線電壓的波動(dòng),使雙饋風(fēng)電系統(tǒng)順利完成故障穿越。最后,針對(duì)在電網(wǎng)電壓不對(duì)稱故障時(shí),矢量控制不能很好的消除因負(fù)序分量引起的定、轉(zhuǎn)子電壓的振蕩以及過(guò)壓,在轉(zhuǎn)子側(cè)變換器采用定子磁鏈跟蹤控制策略代替?zhèn)鹘y(tǒng)的矢量控制,給出控制算法原理以及實(shí)現(xiàn)框圖,在仿真軟件中對(duì)其控制效果進(jìn)行了仿真實(shí)驗(yàn)和結(jié)果分析,結(jié)果驗(yàn)證了定子磁鏈跟蹤控制策略應(yīng)用在雙饋風(fēng)電系統(tǒng)的轉(zhuǎn)子側(cè)變換器中可以抑制無(wú)功、有功功率脈動(dòng),減小定轉(zhuǎn)子過(guò)流和轉(zhuǎn)子過(guò)壓,實(shí)現(xiàn)故障穿越。
[Abstract]:In recent years, in order to deal with the environmental and energy problems, clean energy-wind power rapid development, the world's power system wind power permeability is increasing. Due to the increase of the share of wind power in the total power generation system and the vulnerability to faults in the power grid, it is required that the wind power system be able to resist the failures and maintain the stability of the power grid. The more frequent faults in wind power system are the asymmetry of three-phase grid voltage. As the main type of wind farm, doubly-fed generator occupies a large proportion of wind power industry. The control strategy of the bi-directional converter in the doubly-fed wind power system determines the operating characteristics of the wind turbine, but its design is based on the voltage balance of the power network, and the original control measures are invalid when the fault occurs. As a result, the doubly-fed wind power system is decomposed from the power grid, which will result in a large area of power outages and even great losses. Therefore, it is necessary to study how to improve the control strategy of doubly-fed wind power system in order to improve its grid-connected operation ability in the event of power grid failure. Based on the working principle of DFIG and back-to-back converter, the mathematical model of doubly-fed wind power generator and the model and control scheme of grid-connected converter are established. The whole model is built in the simulation platform to carry out the simulation experiment. On this basis, the voltage asymmetry fault of the power network is analyzed, and the influence of the fault on the stator, rotor and DC busbar of the doubly-fed generation system is given. The fault voltage is reproduced in MATLAB/simulink, and the variation law of the electrical quantities in the fault process is analyzed by simulation. Secondly, the detection technology of fault voltage phase is given, and the system can not stabilize DC bus voltage well because of the existence of negative sequence component in the voltage asymmetry fault. In the grid-side converter, the proportional resonance control strategy is used to replace the traditional vector control. The control algorithm principle and the implementation block diagram are given. The simulation experiment and the result analysis of the control effect are carried out in the simulation software. It is verified that the proportional resonance control strategy can effectively suppress the fluctuation of DC bus voltage and make the double-fed wind power system complete the fault traversing successfully. Finally, the vector control can not eliminate the oscillation and overvoltage caused by the negative sequence component in the voltage asymmetry fault. The stator flux tracking control strategy is used to replace the traditional vector control in the rotor side converter. The principle of the control algorithm and the implementation block diagram are given. The simulation experiment and the result analysis of the control effect are carried out in the simulation software. The results show that the stator flux tracking control strategy used in rotor side converter of doubly-fed wind power system can suppress reactive power, active power pulsation, reduce stator and rotor overcurrent and rotor overvoltage, and realize fault crossing.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM614

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 吳國(guó)祥;戴洋洋;顧菊平;孫繼國(guó);;電網(wǎng)電壓不對(duì)稱跌落時(shí)雙饋電機(jī)的暫態(tài)分析與控制[J];電氣傳動(dòng);2015年08期

2 譚倫農(nóng);王肖;陳武暉;;雙饋風(fēng)電機(jī)組不對(duì)稱故障穿越性能優(yōu)化[J];電網(wǎng)技術(shù);2014年12期

3 王蘇;崔楊;馮東東;;不對(duì)稱故障下雙饋感應(yīng)發(fā)電機(jī)轉(zhuǎn)子電壓分析[J];電測(cè)與儀表;2014年13期

4 孫承奇;潘庭龍;紀(jì)志成;;電網(wǎng)電壓不對(duì)稱故障時(shí)雙饋風(fēng)電機(jī)組多目標(biāo)優(yōu)化控制[J];可再生能源;2014年06期

5 苗寶平;;大規(guī)模風(fēng)電并網(wǎng)引起的電力系統(tǒng)運(yùn)行問(wèn)題及應(yīng)對(duì)策略研究[J];科技視界;2014年01期

6 鐘沁宏;阮毅;趙梅花;談立;;雙饋風(fēng)力發(fā)電轉(zhuǎn)子側(cè)PWM變換器功率控制策略[J];電機(jī)與控制應(yīng)用;2012年12期

7 符曉巍;賈要勤;;雙饋風(fēng)力發(fā)電系統(tǒng)雙PWM變換器的控制策略研究[J];電氣傳動(dòng);2012年09期

8 拜潤(rùn)卿;秦睿;智勇;周喜超;楊勇;;風(fēng)電基地動(dòng)態(tài)無(wú)功補(bǔ)償裝置參數(shù)實(shí)測(cè)與分析[J];中國(guó)電力;2012年02期

9 周鑫;逯洋;劉德坤;;關(guān)于沽源片電網(wǎng)電壓偏高的原因分析及對(duì)策[J];華北電力技術(shù);2011年08期

10 胡勝;林新春;康勇;鄒旭東;;一種雙饋風(fēng)力發(fā)電機(jī)在電網(wǎng)電壓不平衡條件下的改進(jìn)控制策略[J];電工技術(shù)學(xué)報(bào);2011年07期

相關(guān)會(huì)議論文 前1條

1 徐濤;;2012年全球風(fēng)電統(tǒng)計(jì)報(bào)告[A];中國(guó)農(nóng)業(yè)機(jī)械工業(yè)協(xié)會(huì)風(fēng)能設(shè)備分會(huì)2013年度論文集（上）[C];2013年

相關(guān)博士學(xué)位論文 前1條

1 宋亦鵬;不平衡及諧波電網(wǎng)下雙饋風(fēng)力發(fā)電系統(tǒng)控制技術(shù)[D];浙江大學(xué);2015年

相關(guān)碩士學(xué)位論文 前2條

1 何金梅;不平衡電網(wǎng)電壓下雙饋風(fēng)電系統(tǒng)的控制研究[D];哈爾濱工業(yè)大學(xué);2013年

2 譚超;變速恒頻雙饋風(fēng)力發(fā)電系統(tǒng)控制技術(shù)研究[D];湖南大學(xué);2013年

，

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