摘要
首先利用流体力学理论和指数(赫尔曼乘幂)公式推导并建立了三桨叶风力机扫风平面内含塔影效应及风剪切的风速模型,然后对此模型进行了化简,并对模型中各个参数的选择及模型的使用范围做出了解释,最后用Matlab软件对所建立的风速模型进行了对比和分析。该模型考虑了塔架半径、悬垂距离、叶片半径、轮毂高度、轮毂处风速、风剪切系数等因素。结果表明塔影效应相比风剪切对不均匀风速场的贡献更大。该模型简洁有效,适用于电力系统中时域的风力机仿真,为风力机扭矩、风力机控制、风力机载荷等相关研究打下基础。
The theory of hydrodynamics andindex （Herman power） equation are used firstly to derive and establish a model of wind speed considered tower shadow and wind shear for three-blade wind turbine, then simplified it and made an explanation of each parameter, finally, wind model simulated by Matlab was compared and analyzed. The model considered many factors such as the tower radius, overhanging distance, radius blades, hub height factor, wheel speed, wind shear coefficient, and so on. The results show that the effect of wind shadow contributes is much more than wind shear for the non-uniform velocity field. The model is simple and effective, suitable for the wind turbine in time domain power system, and lay a foundation for wind turbine torque, research wind turbine control, wind turbine loads, etc.
出处
《电测与仪表》
北大核心
2015年第8期56-60,共5页
Electrical Measurement & Instrumentation
基金
自治区自然科学基金(2013211A006)
关键词
塔影效应
风剪切
风速
tower shadow effect, wind shear, wind speed
