文档介绍：2
2 2
新能源及工艺
低风速离网型风力发电机的叶片设计
巩真,刘志璋,冯国英
(内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特 010051)
摘要:根据内蒙古四子王旗某地 2007年逐月平均风速表选取设计风速为 6 m / s,根据某型号 300 W 交流永磁
发电机的输出功率特性,利用 Matlab编写的叶片优化设计程序,设计了 300 W 水平轴风力发电机叶片。通过
风轮与发电机的匹配,调整叶片参数,使之在小风时具有较高的风能利用系数,提高风力机的效率,在大风时具
有较低的风能利用系数,从而达到大风时限速保护的目的。
关键词:风力发电机;叶片设计;风能利用系数;风轮与发电机的匹配
中图分类号: TK83 文献标识码: A 文章编号: 1004 - 3950 (2008) 05 - 0040 - 03
Blade design of off gr id w ind turb ine w ith low w ind speed
GONG Zhen, L IU Zhi zhang, FENG Guo ying
( Institute of Energy and Power Engineering, InnerMongolia University of Technology, Huhhot 010051, China)
Abstract: According to monthly average wind speed of 2007of Siziwangqi in Inner Mongolia, design wind speed was
selected as 6 m / s. 300W horizontal axis wind turbine blades were designed using the blade design p rogram written by
MATLAB, based on power output characteristic of a 300W permanent generator. According to the matching
characteristic of turbine and generator, refining blade parameters, the power coefficient is higher when wind speed is
lower than rated value, and the power coefficient is lower in high winds.
Key words:wind turbine generator; blade design; power coefficient; the match of wind turbine and generator
0 引言 1 风轮气动外形的计算
根据当地风况选择风力发电机,一是可以充 1. 1 风轮直径的确定
分利用当地的风力资源,二是可以充分发挥风力风轮直径可由下列公式进行估算:
2
发电机的效率。 1 D 3
P = CPρπ V η
风力发电机的设计风速要与当地风况相吻 2 4
合,