摘 要当今我们现在面对的重要的问题就是能源的减少和环境的恶化。沿用到今天的化石燃料虽能缓解能源紧张的问题，却给大自然造成了很大的影响，而风能具备零污染、可持续、等优点，受到世界列国的关注。86062

稳定、高效的风力发电系统的研发己经成为新能源技术范围之内的热门。然而，因为风能特点是扰乱性、能量质量低和不确定性等特征，与之相关的还有各种硬件建设和软件控制的问题。因此对风机组研究就十分有意义，其中对大型风机组的控制技术的研究更有实际意义。

风力发电的设计运用PLC控制系统。维持和监控风力发电机偏航系统、齿轮箱、液压系统,发电机工作是它的最终要求。选择合适的控制方法,让系统运行的更加稳定,能有效提升风能的利用率。在风电功率控制系统中，风电功率控制和变桨距系统和控制有着决定的关系。本文首先分析风力发电机组的总体结构和变桨距控制原理及特点。介绍变桨距系统的分类，即电动变桨距系统和液压变桨距系统。介绍了变桨距的控制方式可分为统一变桨距系统和独立变桨距系统，并对两者进行了描述。结合实际和本内容，我们选用电动变桨距系统。用MATLAB中的simulink进行建模和仿真。

毕业论文关键词：功率控制；变桨距系统；MATLAB；变桨距控制

Abstract Today we are now faced with an important problem is energy reduction and environmental deterioration。 Use to today's fossil fuels, although to alleviate the problem of energy shortage, but to nature caused great impact, while the wind has zero pollution, sustainable, etc by attention of all countries in the world。 

Stability, development of efficient wind power generation system has become popular within the range of new energy technology。 However, because the wind is disturbing, energy quality low and uncertainty characteristics and related and a variety of hardware construction and software control problem。 Therefore research on wind turbines is very meaningful, which for large scale wind turbine control technology research more practical significance。

 Introduce the classification of electrical design of PLC in wind power control is a very important position。 Wind power generation using PLC control system。 Maintaining and monitoring wind power generator yaw system, gear box, hydraulic system, the generator is its ultimate requirements。 Choose the right control method and make the system run more stable and can effectively improve the wind energy utilization rate。 In the wind power control system, wind power control and variable pitch system and control decision。 Firstly, the analysis of wind power generating units of the overall structure and variable pitch control principle and characteristics。 The variable pitch system, namely the electric variable pitch system and hydraulic variable pitch system。 The variable pitch control mode can be pided to unify the variable pitch system and independent variable pitch system, and the two are described。 According to the reality and the content, we choose electric pitch from the system。 Using Simulink in MATLAB for modeling and simulation。

Keywords: Power control; pitch control system; MATLAB; pitch control

目   录

第一章 绪论 1

1。1风能 1

1。2风能发电的历史与现状 2

1。3风力发电技术的发展 2

1。4风力发电的前景 2

1。5 本章小结 3

第二章 风力发电机组概述 4

2。1 风力发电的原理