关于双馈风力发电机组系统控制的研究..docVIP

湖 北 民 族 学 院 毕业论文（设计） 关于双馈风力发电机组系统控制的研究 学生姓名： 梁 沣 学 号： 030840830 系 别： 电气工程系 专 业：电气工程及其自动化 指导教师： 廖 宇 评阅教师： 论文答辩日期2011年05月27日 答辩委员会主席 摘 要 能源、环境是当今人类生存和发展所要解决的紧迫问题。风力发电清洁无污染，施工周期短，投资灵活，占地少，具有较好的经济效益和社会效益。在目前技术条件下风电与火电、水电相比从造价、电能质量、设备制造和控制技术等领域存在劣势，我国风电领域的理论和应用研究与发达国家存在很大差距。国内对风电机组系统设计技术的研究十分薄弱，风电机组的大型化、变桨距控制、变速恒频等先进风电技术还远未解决，致使我国大型风力机几乎全部为进口产品。因此，深入研究风力发电机组系统设计技术对于持久开发风能和实现风电机组国产化具有重要理论意义和工程应用价值。 风力发电技术是涉及空气动力学、自动控制、机械传动、电机学等多学科的综合性高技术系统工程。目前，风力发电机组的研究难点是风电机组大功率、高可靠性、高效率、低成本。为攻克这些难点，国内外的研究热点是系统优化设计和先进控制策略。本论文针对风电机组系统建模的相关问题从风电机组的空气动力学理论、系统非线性数学模型、系统结构动力学分析及系统实现最大风能捕获控制策略进行了研究。 关键词：风力发电机，空气动力学，结构动力学，非线性模型，控制策略 ABSTRACT Energy and environment are pressing problems that must be settled by human beings for future survival and development. Wind power has preferable economic and social benefits because of its cleanliness and free pollution, short construction period, flexible investment and few occupation of land. At present, there are big gaps between china and developed countries in wind turbine’s theory and application research, be-cause wind power has disadvantage with thermal power and hydropower in cost, power quality, equipment manufacture and control technology. Research of wind turbine in china is very weak and many advanced wind turbine technologies are not solved such as high power capacity, pitch control and variable speed constant frequency etc. Thus, almost all advanced large-scale wind turbines are imported from overseas. In all, in-depth research of wind turbine technology has very important meaning for persistent wind turbine development and home production. Wind turbine is a comprehensive system engineering of high technology which deals with aerodynamics, automatic control, mechanical drive and generator etc. The research difficulties and hot pots of wind power are focused on high power capacity, advanced reliability，high efficiency and low cost