变桨距风力发电机组的控制策略研究—转速控制本科毕业设计说明书.doc

（ 二 〇 一 二 年 六 月  摘 要 因为风能有着绿色环保和可再生等优点，逐渐成为了发电行业的生力军。并且我国的风能储备量居于世界首位，所以对风力发电技术的研究日益成为大学生毕业设计的热门课题。这次毕业设计就是以兆瓦级变桨距风力发电机组为研究对象，因为变桨距控制风力发电技术因其具有在额定功率点以上输出功率平稳﹑在额定点具有较高的风能利用系数﹑确保高风速段的额定功率﹑启动性能和制动性能优越等特点正受到越来越多的重视。Abstract Because the wind has a green environmental protection and renewable etc, so gradually become the main force of the power industry. At the same time our countrys wind energy reserves in the first place of the world, so for wind power technology research increasingly become the hot topic of undergraduate graduation design. This graduation design is to change propeller mega watt from wind power generators for research object, because change propeller from control wind power technology of its power rating point in more stable output power, high point in the rated wind energy coefficient, ensure high wind power rating of the period, starting performance and brake performance characteristics such as superior is being more and more attention. The main purpose of this subject is to the rated wind as much as possible in the absorption of the wind power. Mainly involved in change from wind power generators mathematical model, and then based on the mathematical model is built to paddle control strategy for research. In the course of research put forward the propeller from the Angle adjustment to 0 degrees, and then used PID controller to change generator stator voltage, to adjust the torque to control the generator speed. Time in the matlab software ideas through simulation and tool Simulink verified, the simulation results comply with the design requirements in the beginning of the rated wind may absorb the largest wind power, small overshoots, short setting time purpose. Key words: Variable Propeller Pitch ；Mathematical model；PID controller  目 录 引言 1 第一章 风力发电技术的发展和意义 2 1.1 国内外的发展现状 2 1.1.1国外的发展现状 2 1.1.2国内的发展现状 3 1.2课题研究的意义和内容 3 第二章 风力机变桨距控制的基本原理 5 2．1风力发电机能量转化过程 5 2.1.1风能的计算 5 2.1.