毕业论文：基于PLC变桨系统研究.doc

摘 要 风力发电作为绿色能源在全世界迅速发展，这是解决世界能源危机的重要途径，在这个背景下本文对直驱式永磁风力发电控制系统进行了应用设计。 本文以风力发电的工作原理等基础理论为基本理论，得到一种控制风能的利用效率的变桨控制的基本控制策略；通过比较当前流行的几个风力发电机组的结构和不同控制方案之间的不同特点；分析了直驱式永磁风力发电的性能和特点，最终得出本机组需要采用以“同步高速、无刷励磁旋转、全功率的逆变”为核心的技术路线。 本论文最后完成了风力发电机控制系统的设计，以控制系统所要实现的功能为基础，根据控制系统的要求，分析了系统输出和输入的信号，简单阐述了组成控制系统的硬件系统的可编程处理器和最主要的控制信号变送器，确定了传感器的类型以及各硬件的配置；以这些为基础讨论了一些控制系统的控制策略，研究设计了主程序的流程图，变桨距控制图，并详细的研究了变桨距的控制过程，得出了控制原理和结构组成。 关键词：风力发电机；控制系统；变桨控制 Abstract The rapid development of wind power as a green energy in the world , this is an important way to solve the worlds energy crisis, in this context this paper, the direct-drive permanent magnet wind turbine control system application design . Structures and different control schemes by comparing several currently popular among wind turbine ; This paper -based wind power works for the basic theory and other theories to obtain a controlled wind energy utilization efficiency of the basic control strategy pitch control different characteristics ; analyze the performance and features direct-drive permanent magnet wind power , concluded the unit needs to adopt a synchronous speed , brushless excitation rotation, full power inverter as the core technology roadmap . Finally completed the design of the wind turbine control system to control system functions to be achieved , based on the control system according to the requirements , the system analyzes the signal output and input , briefly addressed the composition of the control system programmable hardware systems the main control signal processor and transmitter to determine the type and configuration of each sensor hardware ; based on these control strategies discussed some of the control system , a flow chart of the main program of study design , variable pitch control charts and detailed study of the pitch of the control process , the control principle and structure derived components. Keywords : wind turbine ; control systems ; pitch control 目 录 摘 要 I 第1章 风力发电简介及背景展望分析 1 1.1 研究背景及意义 1 1.2风力发电简介