毕业设计论文毕业设计论文风力发电场并网运行稳定性研究学 生 姓名： 班 级 学号： 院、系、部 ： 电力工程学院 专 业：电气工程及其自动化指 导 教师： 合作指导教师： 2012 年 06 月 Undergraduate ThesisWind power plant and network operation stabilityBYSupervised byProfessor School of Electric Power EngineeringJune 2012- 1 -摘要二十世纪八十年代以来，并网型风力发电以其独特的能源、环保优势和规模化效益，得到了长足发展，从而风电场并网运行带来的各种问题也引起了人们的广泛关注。随着风电场规模的不断扩大，风电特性对电网的负面影响越来越显著，成为制约风电场规模不断扩大的重要障碍，因此为了进一步开发风电造福人类，深入研究风电场并网运行后对电网造成的影响成为迫切需要解决的问题。尽管当今风电技术发展很迅速，各种新型的风力发电机相比以前都有了很大的进步，它们对风电并网运行的负面影响也在不断减少，但目前大多风电场仍采用普通异步发电机为发电技术的恒速恒频发电系统，异步发电机的一些特性使得研究它的并网运行对电网电压稳定性带来的影响成为必要，这个问题也是本文要研究的主要内容。本文第一章介绍了风力发电的一些发展现状，并简述了跟风电有关的相关概念，简述了大规模风电场并网对电力系统的影响，主要介绍了对电压稳定性影响的重要意义；第二章论述了风力发电系统的组成及分类，指出了不同风力发电系统的特点；在第三章中对恒速恒频风电场各主要组成部分进行详细的数学分析；第四章首先介绍了几种不同的风电场与电网间的连接方式；针对风电场模型建立本文提出了集总模型的方法，得到了风电场 MATLAB/simulink 等效模型；第五章对所建立的仿真模型进行仿真分析，研究了阵风、渐变风、随机风和故障时对电网电压的影响，同时分析无功补偿对电压稳定的作用；第六章则对风电场的静态电压稳定性广义雅可比矩阵分析，得到静态电压稳定边界。电压稳定性是一个很复杂的问题，本文所作的工作还很少，需要更加深入的研究，为以后风电的大规模应用作出贡献。关键词 风力发电，风电场电压稳定性，风电场- -2AbstractGrid-connected wind power generation has been well developed for its special energy Source,beneficial environments and dimensional benefit since 1980s,which absorbs much attention about the questions accompanied with the wind power generationThe characters of wind energy will bring much negative influences with larger scale wind farm being connected to the power grid,these negative influences will restrict the wind energy development,so it is essential to investigate the influences between wind energy and power gridNowadays the technologies about wind power generation has got much progress,the new type generators will decrease the bad influences that brought by grid-connected wind power generation,but most of the wind farm adopt commonly asynchronous generator,some characters of asynchronous generator have a strong relationship with voltage stabilitySo the voltage stability is the emphasis this paper concernsIn the first two chapter of this paper,the history and development of wind energy are introduced,and then explains some correlative concepts about voltage stability,The second chapter discusses the composition and classification of the wind power generation system,and pointed out the characteristics of wind power generation system; in the third chapter,constant speed constant frequency wind farm the main part of a detailed mathematical analysis; in Chapter four of this chapter,first several different wind farms and grid connection; lumped model for the wind farm model,proposed in this paper, MATLAB/simulink equivalent model of the wind farm; Chapter five established simulation model and simulation analysis, gusts grid voltage gradient wind and random wind and failure analysis of the role of the voltage stability of the reactive power compensation team; Chapter six of the static voltage stability of the wind farm generalized Jacobinically matrix, the static voltage stability boundary.Voltage stability is a very complex issue, little work made in this article; you need more in-depth study, to contribute after large-scale application of wind power.Key Words Wind power, Voltage stability of the wind farm, Wind farm- 3 -目录摘要.1Abstract.2目录.3第一章绪论.51.1 风力发电场并网运行的特点及论文选题的意义.51.2 全球风力发电概况.61.3 风力发电机组技术发展趋势.71.4 电力系统电压稳定性研究现状.81.5 本文研究的主要内容及意义.10第二章风力发电系统简介.122.1 风力发电系统的组成及特点.122.2 风力发电机组的控制方式.122.3 并网风力发电系统的分类.142.4 风力发电机的并网运行.152.5 本章小结.16第三章风电场并网系统的数学模型.173.1 引言引言.