【摘要】：隨著能源危機的出現(xiàn)和環(huán)境問題的惡化,發(fā)展新能源技術(shù)成為了全世界各國的關(guān)注熱點。風(fēng)力發(fā)電依靠其較為成熟的技術(shù)、較低的成本,成為了目前各國應(yīng)用最廣泛的可再生能源之一,并獲得了快速發(fā)展。但是隨著風(fēng)電并網(wǎng)規(guī)模不斷增大,單機容量不斷提高,對于電網(wǎng)的安全運營和調(diào)度提出了更高的要求。電網(wǎng)針對這一問題,出臺了相應(yīng)的風(fēng)電場并網(wǎng)要求,對風(fēng)電場并網(wǎng)、電壓故障穿越能力等方面提出了更高的要求。雙饋風(fēng)電機組作為目前最為廣泛使用的風(fēng)電機組,由于其結(jié)構(gòu)的特殊性,對電網(wǎng)故障非常敏感,若不采取有效措施,容易導(dǎo)致機組脫網(wǎng),進一步惡化電網(wǎng)運行。所以如何提高雙饋風(fēng)電機組的故障耐受能力是一個非常值得深入探討和研究的課題。本文針對這一背景,對雙饋風(fēng)電機組進行了詳細(xì)的研究。主要包括了對雙饋風(fēng)電機組系統(tǒng)的數(shù)學(xué)建模分析,建立了包括風(fēng)力機、傳動鏈、發(fā)電機和變流器在內(nèi)的數(shù)學(xué)模型,推導(dǎo)了相應(yīng)的矢量控制策略,并提出了用內(nèi)�？刂频姆椒▉碚ǹ刂破鞯膮�(shù),隨后在PSCAD/EMTDC軟件中建立相應(yīng)的仿真模型系統(tǒng),并進行了仿真驗證;對雙饋風(fēng)電機組在電網(wǎng)故障情況下暫態(tài)情況進行了分析,推導(dǎo)了轉(zhuǎn)子電壓電流在電網(wǎng)對稱和不對稱故障情況下的數(shù)學(xué)表達(dá)式,并提出了相應(yīng)的雙饋風(fēng)電機組的低電壓穿越控制策略,在仿真模型中進行了驗證;提出了一種采用超級電容的提高雙饋風(fēng)電機組故障耐受能力的控制策略,介紹了該系統(tǒng)的拓?fù)浣Y(jié)構(gòu)、超級電容的容值計算以及相應(yīng)控制策略,并在仿真中驗證了該控制策略的有效性。
[Abstract]:With the emergence of energy crisis and the deterioration of environmental problems, the development of new energy technology has become the focus of attention all over the world. Wind power generation, relying on its mature technology and low cost, has become one of the most widely used renewable energy sources in various countries, and has achieved rapid development. However, with the increasing of wind power grid-connected scale and single-machine capacity, higher requirements for safe operation and dispatching of power grid are put forward. In view of this problem, the grid issued the corresponding requirements of wind farm grid connection, and put forward higher requirements for wind farm grid connection, voltage fault traversing capacity and so on. As the most widely used wind turbine at present, doubly-fed wind turbine is very sensitive to grid faults because of its special structure. If no effective measures are taken, it is easy to cause the unit to get out of the grid and worsen the operation of the power grid further. Therefore, how to improve the fault tolerance of doubly-fed wind turbines is a topic worthy of in-depth discussion and research. In view of this background, the doubly-fed wind turbine is studied in detail in this paper. The mathematical models including wind turbine, transmission chain, generator and converter are established, and the corresponding vector control strategy is deduced, which includes the mathematical modeling and analysis of doubly-fed wind turbine system, including wind turbine, transmission chain, generator and converter. The method of internal model control is proposed to adjust the parameters of the controller, and then the corresponding simulation model system is established in PSCAD/EMTDC software, and the simulation verification is carried out. The transient state of doubly-fed wind turbine under power grid fault is analyzed, and the mathematical expressions of rotor voltage and current under symmetrical and asymmetric faults are derived. The low voltage traversal control strategy of the corresponding doubly fed wind turbine is proposed and verified in the simulation model. This paper presents a control strategy to improve the fault tolerance of doubly-fed wind turbine with super capacitor. The topology of the system, the calculation of the capacitance and the corresponding control strategy are introduced. The effectiveness of the control strategy is verified in the simulation.
【學(xué)位授予單位】：上海交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM315

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 段一雄,熊志全,葉鋒,譚e，

本文編號：2432065