Abstract：For wind farms with low air density, when the wind turbine is running near the rated wind speed, the blade roots will stall and seriously affect the stable operation of the unit. In order to solve the problem of blade stall, this paper proposes two solutions for the advance pitching strategy and the root canal root can be installed. At the same time, the two schemes are verified by three-dimensional numerical simulation. The results show that the two methods can reduce the surface separation of the blade. The advanced pitch control strategy can increase the power of the unit by about 1.78%, while the root box can increase the power of the unit by about 2.14%, that is to say the effect of installing the root box is more obvious in the improvement effect. But for the built wind field, from the economical consideration, the effect of using the advanced pitch control strategy to solve the blade stall problem is more effective.
标题：低空气密度下的风力机叶片失速控制技术
title:Wind Turbine Blade Stall Control Technology at Low Air Density
