可再生能源Issue(1)：27-32,6.
风切变和塔影效应对风力机变桨距控制的影响分析
The analysis of the pitch control of wind turbine by the influences of wind shear and tower shadow
摘要
Abstract
With the power of a single wind turbine increasing, the effect of the pitch control for the improvement of the wind turbine starting/braking performance and stabilizing the output power are continuously showed. It also causes the higher wind tower and the longer diameter of the wind wheel. The difference of the wind speed distribution is bigger. This paper build the model of wind based on wind shear and tower shadow and the model of the wind wheel based on blade element theory. It proves the pulsation of the output power, the torque, the speed and also the pitch angle caused by wind shear and tower shadow. The pulsation also causes the unbalanced load on the blade which reduced the life of the blade. So the individual pitch control is necessary for the large wind turbines to reduce above-mentioned problems.关键词
风切变/塔影效应/变桨距控制Key words
wind shear/tower shadow/pitch control分类
能源科技引用本文复制引用
周波,龚华军,甄子洋..风切变和塔影效应对风力机变桨距控制的影响分析[J].可再生能源,2012,(1):27-32,6.基金项目
国家"863"基金项目(2008A A05Z302). （2008A A05Z302）
