本文選題：風力發(fā)電 + 雙饋異步發(fā)電機��； 參考：《山東大學》2014年碩士論文

【摘要】：隨著社會的不斷發(fā)展,能源的消耗也在不斷加劇,傳統(tǒng)能源正逐步枯竭,以可再生能源為代表的新能源在電力系統(tǒng)中所占的比重越來越大。風力發(fā)電作為新能源發(fā)電技術(shù)中最成熟、最易大規(guī)模開發(fā)、最具商業(yè)發(fā)展前景的發(fā)電方式,越來越受到世界各國的關(guān)注。但是,由于風能的間歇性、隨機性和不可調(diào)控性等特點,伴隨著風電產(chǎn)業(yè)的不斷發(fā)展和并網(wǎng)總裝機容量的不斷增大,風電并網(wǎng)對電力系統(tǒng)的安全穩(wěn)定運行和電壓穩(wěn)定性的影響越來越突出。因此對風電并網(wǎng)的影響進行研究是十分必要的。 但是由于風力發(fā)電系統(tǒng)復雜的結(jié)構(gòu)和多樣化的控制方式,大規(guī)模風電的并網(wǎng)會對系統(tǒng)各方面都有影響,主要體現(xiàn)在對系統(tǒng)暫態(tài)的影響和靜態(tài)的影響。本文主要研究風電并網(wǎng)對系統(tǒng)電壓的影響,在風力發(fā)電機并網(wǎng)運行的動態(tài)特性和靜態(tài)電壓穩(wěn)定性方面做了以下工作： 首先,在充分了解風力發(fā)電機的結(jié)構(gòu)和分類后,選取雙饋風力發(fā)電機作為研究對象。在對雙饋風力發(fā)電系統(tǒng)工作原理和各個部分的數(shù)學模型進行深入研究的基礎上,在MATLAB SIMULINK中分別建立了不同的模型風速和風速的組合模型、雙饋風力發(fā)電場模型和雙饋風力發(fā)電場并網(wǎng)模型,以及完整的雙饋風力發(fā)電場并網(wǎng)動態(tài)模型。 其次,本文根據(jù)所建立的雙饋風力發(fā)電場并網(wǎng)動態(tài)模型進行仿真,分析了雙饋風力發(fā)電機組在正常運行狀態(tài)、風速超過額定狀態(tài)和電網(wǎng)線路發(fā)生接地短路故障時的電網(wǎng)電壓等動態(tài)響應特性,分析在不同情況下,雙饋風力發(fā)電機并網(wǎng)對電力系統(tǒng)暫態(tài)電壓的影響；并驗證了雙饋風力發(fā)電機組在三相接地短路故障時的低電壓穿越能力。 最后,對含雙饋風力發(fā)電系統(tǒng)的電網(wǎng)靜態(tài)電壓穩(wěn)定性分析方法進行了詳細比較,結(jié)合常規(guī)電力系統(tǒng)潮流計算方法,確定了含雙饋風力發(fā)電系統(tǒng)的電網(wǎng)潮流計算方法。根據(jù)所建立雙饋風力發(fā)電場模型中風速和功率的關(guān)系,對含有風電場的EPRJ-36節(jié)點算例進行潮流運算,并在此基礎上進行電壓穩(wěn)定性計算,通過靈敏度和穩(wěn)定裕度分析方法對系統(tǒng)電壓穩(wěn)定性問題進行了分析研究。
[Abstract]:With the continuous development of society, energy consumption is also increasing, traditional energy is gradually depleted, renewable energy as the representative of the new energy in the power system accounts for more and more proportion. Wind power generation, as the most mature, easy to develop on a large scale and the most commercial power generation method in the new energy generation technology, has been paid more and more attention by the countries all over the world. However, due to the intermittent, stochastic and uncontrollable characteristics of wind energy, with the continuous development of wind power industry and the continuous increase of the total installed capacity of grid, The influence of wind power grid connection on the safe and stable operation and voltage stability of power system is becoming more and more prominent. Therefore, it is necessary to study the influence of wind power grid connection. However, due to the complex structure and diversified control methods of wind power system, large-scale wind power grid connection will have an impact on all aspects of the system, mainly reflected in the transient and static impact of the system. In this paper, the influence of wind power grid connection on system voltage is studied, and the following work is done on the dynamic characteristics and static voltage stability of wind turbine grid-connected operation: Firstly, after fully understanding the structure and classification of wind turbine, the doubly-fed wind turbine is selected as the research object. On the basis of deeply studying the working principle and mathematical models of each part of doubly-fed wind power generation system, different wind speed and wind speed combination models are established in MATLAB SIMULINK. The model of doubly-fed wind farm, the grid-connected model of doubly-fed wind farm and the complete grid-connected dynamic model of doubly-fed wind farm are presented. Secondly, according to the dynamic model of grid-connected doubly-fed wind farm, the paper analyzes the normal operation state of doubly-fed wind turbine. The dynamic response characteristics such as the wind speed exceeding the rated state and the power grid voltage when the power line ground short circuit fault occur are analyzed. The influence of grid-connected doubly-fed wind turbine on the transient voltage of the power system is analyzed under different conditions. The low voltage traversing ability of doubly-fed wind turbine in three phase earthing short circuit fault is verified. Finally, the static voltage stability analysis method of wind power system with doubly-fed power system is compared in detail. Combined with the conventional power flow calculation method, the power flow calculation method of wind power system with doubly-fed wind power system is determined. According to the relationship between wind speed and power in the model of doubly-fed wind farm, the power flow calculation of EPRJ-36 node with wind farm is carried out, and the voltage stability is calculated on this basis. The voltage stability of the system is studied by sensitivity and stability margin analysis.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM614;TM712

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