毕业论文：基于PLC变桨系统的研究.doc

摘 要 随着全球经济的发展和人口的增长，人类正面临着能源利用和环境保护两方面的压力。风能作为一种蕴藏量丰富的自然资源因其使用便捷，可再生、成本低、无污染等特点，在世界范围内得到了较为广泛的使用和迅速发展，发展潜力巨大。特别是随着风力发电控制技术和伺服控制技术的迅猛发展。风能作为清洁的可再生资源受到全世界的重视，同时各国对变桨距风力机的设计、控制和运行已有完整的理论和方法，目前兆瓦级风力机已经是国际风电市场上的主流产品。随着风力发电机组大型化，智能化的发展，风力机必须具有较高的可靠性、风能利用系数和不断优化的输出功率曲线，变桨距技术随之产生。与定桨距控制技术相比，变桨距控制的优点是桨叶较为轻巧，桨距角可以随风速的大小而自动调节，因而能够尽可能更多的吸收风能，同时在高风速段保持平稳的功率输出。 关键词:电动变桨系统；MotionPLC；交流伺服电机；CAN总线 Abstract With the global economic development and population growth , humanity is facing pressure on energy utilization and environmental protection in two ways. Wind power as an abundant reserves of natural resources for its ease of use , renewable, low- cost , no pollution, in the world has been more widely used and the rapid development and huge development potential. Especially with the rapid development of wind power control technology and servo control technology. Wind energy as a clean and renewable resource attention of the world, while the countries of the variable pitch wind turbine design, control and operation of the existing complete theory and methods currently megawatt wind turbine has been the mainstream products in the international wind power market . With large-scale wind turbine , intelligent development , wind turbine must have a high reliability , wind energy utilization factor and the continuous optimization of the output power curve , pitch technology follow. Compared with fixed pitch control technology , the advantages of variable blade pitch control is relatively lightweight, wind speed pitch angle can automatically adjust the size , and thus able to absorb more wind as much as possible , while maintaining high wind segment smooth power output. ??Keywords : electric pitch system ; MotionPLC; AC servo motor ; CAN bus 目 录 第1章 绪论 1 1.1.选题背景和意义 1 1.1.1环境的保护和新能源的发展能源 1 1.1.2风力资源的利用和系统的国产化 1 1.2风力发电的发展过程 2 1.3风力发电变桨控制系统国内外的研究现状 2 第2章 风力发电变桨系统的原理和结构 3 2.1 风力发电机的原理 3 2.1.1风力发电机的结构 4 2.2风力发电机变桨系统的原理 6 2.2.1定桨距系统 6 2.2.2变桨距系统 6 2.3风力发电机变桨系统的结构 9 2.3.1变桨伺服系统 10 2.3.2减速机 14