發(fā)布時間：2018-04-02 22:37

  本文選題：雙饋風電機組　切入點：降階　出處：《華北電力大學》2014年碩士論文

【摘要】：隨著電網(wǎng)對風電并網(wǎng)運行能力的要求不斷提高,風電并網(wǎng)系統(tǒng)的控制優(yōu)化、風電并網(wǎng)送出、風電對電力系統(tǒng)的影響成為當前的研究熱點,開發(fā)適合系統(tǒng)分析用風電機組模型是開展這些研究的關鍵技術內容和重要的實現(xiàn)條件。本文從雙饋風電機組原理及建模、模型降階方法、模型對比分析以及基于簡化模型的風電場動態(tài)等值幾個方面開展研究。 在建立雙饋風電機組各部分的數(shù)學模型并詳細分析機組控制技術原理的基礎上,系統(tǒng)地論述了雙饋風電機組的降階方法,詳細分析了由電磁全階模型到電磁簡化模型最后到機電暫態(tài)模型的衍變過程：簡化機側和網(wǎng)側變流器模型,將變流器用可控電壓源代替,模擬變流器提供的勵磁電壓以及網(wǎng)側變流器調制電壓,從而得到雙饋風電機組電磁簡化模型；進一步把發(fā)電機簡化也考慮在內,將發(fā)電機-變流器模型整體用可控電流源代替,關注風力機的外特性,模擬機組向系統(tǒng)輸送的功率,得到雙饋風電機組機電暫態(tài)模型。 對電磁簡化模型以及機電暫態(tài)模型與全階模型進行了性能比較,包括模型的主要結構差異與參數(shù)對應關系、電網(wǎng)電壓正常風速發(fā)生階躍工況與恒定風速電網(wǎng)電壓發(fā)生跌落兩種工況下的運行特性以及計算速度三個方面,并對造成其差異的原因進行了詳細的分析。 介紹了基于一種簡化模型的風電場動態(tài)等值的主要步驟,包括機群劃分、等值發(fā)電機與風力機的參數(shù)等值以及控制系統(tǒng)參數(shù)等值：并以11臺風電機組并網(wǎng)構成的風電場為例,通過對比詳細模型與等值模型的仿真結果,驗證了提出的風電場動態(tài)等值方法的有效性。
[Abstract]:With the increasing demand of wind power grid operation ability, the control optimization of wind power grid connection system, wind power grid transmission, wind power impact on the power system has become the focus of current research.The development of wind turbine model suitable for system analysis is the key technical content and important condition to carry out these researches.In this paper, the principle and modeling of doubly-fed wind turbine, the method of model reduction, the comparative analysis of model and the dynamic equivalence of wind farm based on simplified model are studied.Based on the establishment of mathematical model of each part of doubly-fed wind turbine and the detailed analysis of the principle of unit control technology, the method of reducing the order of doubly-fed wind turbine is discussed systematically.The evolution process from electromagnetic full-order model to electromagnetic simplified model and finally to electromechanical transient model is analyzed in detail. The converter is replaced by a controllable voltage source by simplifying the converter model on the machine side and the grid-side converter.The excitation voltage provided by the converter and the modulation voltage of the grid-side converter are simulated to obtain a simplified electromagnetic model for the doubly-fed wind turbine, and further simplification of the generator is also taken into account, and the whole model is replaced by a controllable current source.Focusing on the external characteristics of the wind turbine, the electromechanical transient model of the doubly-fed wind turbine is obtained by simulating the power transmission from the unit to the system.The performance of the simplified electromagnetic model, the electromechanical transient model and the full-order model are compared, including the main structural differences of the model and the corresponding relationship between the parameters.In this paper, the operating characteristics and calculating speed of normal wind speed step condition and constant wind speed voltage drop condition are discussed in detail, and the causes of the difference are analyzed in detail.This paper introduces the main steps of wind farm dynamic equivalence based on a simplified model, including cluster partition, parameter equivalence between equivalent generators and wind turbines, and control system parameter equivalence.By comparing the simulation results of the detailed model and the equivalent model, the validity of the proposed dynamic equivalence method for wind farm is verified.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM315

【參考文獻】

相關期刊論文 前10條

1 趙棟利;胡書舉;趙斌;許洪華;;風力發(fā)電機、變流器及其低電壓穿越概述[J];變頻器世界;2009年02期

2 喬嘉賡;魯宗相;閔勇;劉捷;謝珍建;王海潛;;風電場并網(wǎng)的新型實用等效方法[J];電工技術學報;2009年04期

3 劉力卿;李秀錦;余洋;王磊;閆坤;;變速恒頻雙饋風電機組風電場動態(tài)出力特性建模方法[J];電力科學與工程;2011年12期

4 鞠平;電力系統(tǒng)負荷建模理論與實踐[J];電力系統(tǒng)自動化;1999年19期

5 雷亞洲;與風電并網(wǎng)相關的研究課題[J];電力系統(tǒng)自動化;2003年08期

6 尹明;李庚銀;周明;趙成勇;;雙饋感應風力發(fā)電機組動態(tài)模型的分析與比較(英文)[J];電力系統(tǒng)自動化;2006年13期

7 栗然;唐凡;劉英培;柯?lián)砬?張孝乾;;基于自適應變異粒子群算法的雙饋風電機組等值建模[J];電力系統(tǒng)自動化;2012年04期

8 湯宏,吳俊玲,周雙喜;包含風電場電力系統(tǒng)的小干擾穩(wěn)定分析建模和仿真[J];電網(wǎng)技術;2004年01期

9 孫建鋒,焦連偉,吳俊玲,周雙喜,陳壽孫;風電場發(fā)電機動態(tài)等值問題的研究[J];電網(wǎng)技術;2004年07期

10 胡杰;余貽鑫;;電力系統(tǒng)動態(tài)等值參數(shù)聚合的實用方法[J];電網(wǎng)技術;2006年24期

，

本文編號：1702461