發(fā)布時(shí)間：2018-03-24 11:46

  本文選題：風(fēng)電場(chǎng)　切入點(diǎn)：雙饋風(fēng)電機(jī)組　出處：《上海電力學(xué)院》2014年碩士論文

【摘要】：面對(duì)傳統(tǒng)化石能源的日益枯竭和能源開(kāi)發(fā)利用造成的環(huán)境污染，能源和環(huán)境成為社會(huì)發(fā)展急需解決的問(wèn)題，風(fēng)能以儲(chǔ)量大、清潔、可再生等優(yōu)點(diǎn)得到廣泛使用，利用風(fēng)能的發(fā)電技術(shù)得到快速發(fā)展，大規(guī)模風(fēng)電場(chǎng)不斷出現(xiàn)。風(fēng)電接入電網(wǎng)對(duì)電網(wǎng)的安全穩(wěn)定運(yùn)行帶來(lái)重大挑戰(zhàn)，其中風(fēng)電接入電網(wǎng)的無(wú)功控制和電壓穩(wěn)定問(wèn)題是最受關(guān)注和急需解決的問(wèn)題。 我國(guó)新建的風(fēng)電場(chǎng)多采用變速恒頻雙饋感應(yīng)風(fēng)電機(jī)組，該機(jī)組已成為國(guó)內(nèi)主流風(fēng)電機(jī)型，本文針對(duì)雙饋風(fēng)電場(chǎng)接入系統(tǒng)引起的電壓穩(wěn)定問(wèn)題對(duì)風(fēng)電場(chǎng)的無(wú)功控制和電壓穩(wěn)定展開(kāi)研究。 首先，本文分析了風(fēng)速模型和風(fēng)力機(jī)的氣動(dòng)特性，并介紹了雙饋感應(yīng)風(fēng)力機(jī)的數(shù)學(xué)模型，討論了雙饋風(fēng)電機(jī)組的功率傳輸特性，根據(jù)數(shù)學(xué)模型和功率傳輸特性計(jì)算出雙饋風(fēng)機(jī)的無(wú)功極限，分析了雙饋風(fēng)機(jī)的運(yùn)行控制區(qū)域和運(yùn)行控制方式。 其次，本文分析了風(fēng)電場(chǎng)中風(fēng)機(jī)的尾流效應(yīng)影響，根據(jù)尾流效應(yīng)對(duì)風(fēng)機(jī)劃群，考慮等值前后的功率損耗和電壓降落相同提出了一種平坦地區(qū)風(fēng)電場(chǎng)的動(dòng)態(tài)等值計(jì)算方法，探討了并網(wǎng)風(fēng)電場(chǎng)的電壓穩(wěn)定研究方法。對(duì)某風(fēng)電場(chǎng)進(jìn)行仿真研究，，通過(guò)風(fēng)電場(chǎng)靜態(tài)電壓穩(wěn)定分析得到風(fēng)電場(chǎng)薄弱母線，并對(duì)雙饋風(fēng)電機(jī)組的恒電壓運(yùn)行方式和恒功率運(yùn)行方式在暫態(tài)中的影響進(jìn)行分析討論。 由于風(fēng)電場(chǎng)有功出力隨風(fēng)速變化具有隨機(jī)性和波動(dòng)性，風(fēng)電場(chǎng)發(fā)出或吸收無(wú)功將隨有功出力波動(dòng)變化，風(fēng)電場(chǎng)將對(duì)其所接入的弱電網(wǎng)產(chǎn)生電壓波動(dòng)。本文分析了無(wú)功和電壓關(guān)系以及風(fēng)電場(chǎng)各元件的無(wú)功消耗，并討論了風(fēng)電場(chǎng)所使用的無(wú)功電壓調(diào)節(jié)設(shè)備的特點(diǎn)。然后，本文綜合利用靜止同步補(bǔ)償器快速、連續(xù)的無(wú)功調(diào)節(jié)能力和雙饋風(fēng)電機(jī)組的動(dòng)態(tài)無(wú)功發(fā)生能力提出了一種兩級(jí)無(wú)功電壓協(xié)調(diào)控制策略，以實(shí)現(xiàn)動(dòng)態(tài)補(bǔ)償風(fēng)電場(chǎng)無(wú)功，進(jìn)而穩(wěn)定系統(tǒng)節(jié)點(diǎn)電壓。 最后，本文通過(guò)算例驗(yàn)證了風(fēng)電場(chǎng)無(wú)功電壓控制策略的有效性，證明該策略能夠抑制風(fēng)速引起電壓波動(dòng)，系統(tǒng)電壓跌落時(shí)能起到一定的電壓支撐能力。
[Abstract]:In the face of the environmental pollution caused by the depletion of traditional fossil energy and the exploitation and utilization of energy, energy and environment have become an urgent problem for social development. Wind energy has been widely used with the advantages of large reserves, clean and renewable, etc. With the rapid development of wind power generation technology, large-scale wind farms continue to emerge. Connecting wind power to the power grid poses a major challenge to the safe and stable operation of the grid. The problem of reactive power control and voltage stability of wind power connected to power grid is the most concerned and urgent problem. Most of the new wind farms in China use variable speed constant frequency doubly-fed induction wind turbines, which have become the mainstream wind turbines in China. In this paper, the reactive power control and voltage stability of wind farm are studied for the voltage stability problem caused by doubly-fed wind farm access system. Firstly, this paper analyzes the wind speed model and the aerodynamic characteristics of the wind turbine, introduces the mathematical model of the doubly-fed induction wind turbine, and discusses the power transmission characteristics of the doubly-fed wind turbine. According to the mathematical model and power transmission characteristics, the reactive power limit of doubly-fed fan is calculated, and the operation control area and operation control mode of doubly-fed fan are analyzed. Secondly, the influence of wind turbine wake effect in wind farm is analyzed. According to the wake effect, considering the same power loss and voltage drop before and after equivalence, a dynamic equivalent calculation method of wind farm in flat area is put forward. The research method of voltage stability of grid-connected wind farm is discussed. The weak busbar of wind farm is obtained through static voltage stability analysis of wind farm. The influence of constant voltage operation mode and constant power operation mode on transient state of doubly-fed wind turbine is analyzed and discussed. Due to the randomness and volatility of the active power output with the wind speed, the reactive power emitted or absorbed by the wind farm will fluctuate with the active power output. Wind farm will produce voltage fluctuation to the weak network connected to it. This paper analyzes the relationship between reactive power and voltage and the reactive power consumption of each element of wind farm, and discusses the characteristics of reactive power and voltage regulating equipment used in wind farm. In this paper, a two-stage reactive power and voltage coordinated control strategy is proposed to realize the dynamic compensation of reactive power in wind farm by using the fast, continuous reactive power regulation ability of static synchronous compensator and the dynamic reactive power generation ability of doubly-fed wind turbine. Then the system node voltage is stabilized. Finally, the effectiveness of reactive power and voltage control strategy in wind farm is verified by an example. It is proved that the strategy can restrain the voltage fluctuation caused by wind speed and play a certain voltage supporting capacity when the system voltage drops.
【學(xué)位授予單位】：上海電力學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM614

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 耿華;楊耕;馬小亮;;并網(wǎng)型風(fēng)力發(fā)電機(jī)組的控制技術(shù)綜述[J];電力電子技術(shù);2006年06期

2 王松巖;朱凌志;陳寧;于繼來(lái);;基于分層原則的風(fēng)電場(chǎng)無(wú)功控制策略[J];電力系統(tǒng)自動(dòng)化;2009年13期

3 袁駿,段獻(xiàn)忠,何仰贊,石東源;電力系統(tǒng)電壓穩(wěn)定靈敏度分析方法綜述[J];電網(wǎng)技術(shù);1997年09期

4 周雙喜,姜勇,朱凌志;電力系統(tǒng)電壓靜態(tài)穩(wěn)定性指標(biāo)述評(píng)[J];電網(wǎng)技術(shù);2001年01期

5 申洪,王偉勝,戴慧珠;變速恒頻風(fēng)力發(fā)電機(jī)組的無(wú)功功率極限[J];電網(wǎng)技術(shù);2003年11期

6 遲永寧;劉燕華;王偉勝;陳默子;戴慧珠;;風(fēng)電接入對(duì)電力系統(tǒng)的影響[J];電網(wǎng)技術(shù);2007年03期

7 孫元章;吳俊;李國(guó)杰;;風(fēng)力發(fā)電對(duì)電力系統(tǒng)的影響(英文)[J];電網(wǎng)技術(shù);2007年20期

8 張鋒;晁勤;;STATCOM改善風(fēng)電場(chǎng)暫態(tài)電壓穩(wěn)定性的研究[J];電網(wǎng)技術(shù);2008年09期

9 薛尚青;蔡金錠;劉麗軍;;靜止同步補(bǔ)償器與雙饋風(fēng)電場(chǎng)的無(wú)功電壓協(xié)調(diào)控制[J];電工電能新技術(shù);2013年02期

10 李輝;栗樹(shù)材;包偉華;張浩;;并網(wǎng)風(fēng)電場(chǎng)電壓穩(wěn)定的無(wú)功補(bǔ)償策略[J];電力科學(xué)與工程;2013年09期

本文編號(hào)：1658161