【作者】 李强；

【导师】 唐宗军； 姚兴佳；

【作者基本信息】 沈阳工业大学 ， 机械电子工程， 2003， 硕士

【摘要】 本文以国家863计划《兆瓦级变速恒频风电机组》(课题编号：2001AA512022)为背景，主要研究了兆瓦级风电机组的变桨距机构及其单机控制系统。 变桨距风力发电机组与定桨距风力发电机组相比，在额定功率点以上输出功率平稳、具有较高的风能利用系数、能够确保高风速段的额定功率、起动性能与制动性能好等特点。变桨距风力发电机组根据变桨距系统所起的作用可分为三种运行状态，即风力发电机组的起动状态、欠功率状态和额定功率状态。本文利用叶素理论，经计算分析得出：通过改变风力机安装角φ可以改变桨距H，从而改变风力机的转速ω。 变距机构是变桨距控制型风电机组实现变距控制和安全刹车的关键机构之一，它的运动由平动和转动两部分组成。平行移动是由液压油缸推动，通过推动轴承传到推杆、同步盘，并相互配合实现的；旋转运动是由曲柄、三角架导向轴完成的。本文按照1MW风电机组总体方案要求，设计出一种结构合理，反应灵敏、操作方便的变桨距机构。同时经过计算分析得出桨叶的驱动力，从而为下一步的设计及液压系统提供参数。 风力发电机组控制系统可分为两个方面，一是单机控制，另一个是群机控制。本文以1MW变桨距风电机组为研究对象，根据其主要技术参数及控制工作过程，对其单机控制系统的构成进行了设计，阐述了输入输出接口和各个控制环节的运行原理及其相互之间的联系与约束关系，从而实现在无人值守的条件下，实现多种预定的控制目标，并在此基础上探讨其更广泛的适应性及实用性。更多还原

【Abstract】 The paper studies the pitch-regulated structure and stand-alone control system about MW wind turbine group. The background of the paper is "MW variable-speed constant-frequency wind turbine group(No. 2001AA512022)",which is supported by National 863 Plan.Compared with fix-pitch wind turbine, the variable-pitch wind turbine has the virtue : stable output power over rated power, high wind power coefficient, holding rated power at high wind speed, good starting and shut-off etc.. According to the effect of variable-pitch system, we can divide the operation process into three states: starting, below rated power and rated power. The result of computer and analysis based on blade elements theory shows us that we can regulate the rotate speed of wind turbine rotor by changing set angle and pitch H.Variable-pitch system is the key component of the whole wind turbine, which can assure safely pitch-control and brake. It is composed of two components: level move and rotation. Level move is realized by the co-operation of oil vat, handspike and synchronizer. Rotation is realized by the brace and the triangle oriented axis. Based on 1MW wind turbine design, this paper offers one reasonable variable-pitch structure, which can response quickly and operate conveniently. The drive impetus deduces from computation and analyses, which can provide design parameter for hydraulic pressure system.The control system of wind turbine includes individual control and group control. According to the control process and main technical parameter, the paper accomplishes the control system structure design and input-output system design. This paper also deeply analyzes the operation principle of the whole control system and the relation between each part in order to realize the no-person automatic operate.更多还原