摘要当今世界，人类的衣食住行都依赖于能源，它是世界的血液，为世界的发展 提供强大的动力。1679 年第一台蒸汽机的问世，开启了人类对能源利用的新纪 元。从此它带动着人类社会的发展，几个世纪的社会发展，也带来了能源的巨大 消耗。现在，人类赖以生存的能源是天然气等化石能源。这种能源的利用方式带来了两个问题：第一个问题是含碳燃料的燃烧产生的CO2 气体，造成了温室效应，全球温度增加，冰山融化，海平面上升等一系列环境问题。第二经过几千年甚至上万年的地质时期才形成的有限的化石能源，随着人类的大量使用，面临着枯竭 的危险。 

为了保证人类生存发展的需要，保持社会经济的可持续发展，节省能源和使 用新型、清洁可再生能源是当务之急。开发利用可再生清洁能源是现在研究的一 个重要课题。风能是现在最具有大规模开发利用条件的一种新型清洁能源之一， 用风能带动电机产生电能是利用风能的最佳形式。经过半个多世纪的发展，在世 界范围内风电机组的装机容量也快速增大。现在我国已成为世界上风力发电技术 发展最快的国家。 72237

本文给出了风能的分布及其开发利用，风力发电作为风能的主要利用形式其 发展非常迅猛。变速恒频风力发系统作为一种新兴的发电技术在风力发电领域具 有很大的发展空间和广阔的应用前景。双馈异步发电机是变速恒频发电系统中性 能较好的一种发电机，本文通过分析了双馈异步发电机的运行原理及其数学模型 以及分析矢量控制的原理。通过这些分析设计出了包括变桨距系统、基于 PLC 控制的偏航系统以及以双馈异步发电机为主体的风力发电系统以实现最大风能 的追踪控制。 

毕业论文关键词：风力发电 变速恒频 双馈异步发电机 可编程逻辑控制器

Wind power generation system maximum wind power tracking control

Abstract In today's world, the daily life of human lines is dependent on energy, it is the blood of the world, provide a powerful motivation for the development of the world。The first steam engine in 1679, opened a new epoch in human on energy use。Since then, it drives the development of human society, centuries of social development, also has brought the huge energy consumption。Now, energy is natural gas to the survival of humans and other fossil fuels。This way of energy utilization raises two questions: the first question is carbon gases from the burning of fuel, the greenhouse effect caused by the global temperature increase, melting glaciers, rising sea levels and a series of environmental problems。The second after thousands or even tens of thousands of years of geological period to form limited fossil energy, along with the use of human, in danger of drying up。

In order to guarantee the need of human survival and development, maintain the sustainable development of social economy, energy conservation and the use of new, clean and renewable energy is a priority。The development and utilization of renewable clean energy is an important subject in the research of now。Wind power is now one of the most large-scale development and utilization conditions of one of a kind of new clean energy, use wind power to drive motor to generate electricity is to use the best form of wind energy。After more than half a century of development, the installed capacity of wind turbines worldwide also increase quickly。Now our country has become a wind power generation technology of the fastest growing country in the world。

The paper gives the distribution of wind energy, the development and   utilization

of wind power as the main use of wind energy form its developing very rapidly。Variable speed constant frequency wind hair system as a  new power generation technology in the field of wind power has the very big development space and wide application prospects。Doubly-fed induction generator is variable speed constant frequency electric system with better performance in a generator, this paper analyzes the operation principle and mathematical model of doubly-fed induction generator and the analysis of the principle of vector control。Through these analysis designed including variable pitch system, yaw system based on PLC control, as well as with doubly-fed induction generator as the main body of the wind  power generation system in order to realize the maximum wind power tracking control。