低空气密度的风电场中，当风电机组在接近额定风速附近运行时，叶片根部易出现失速，严重影响机组稳定运行。为解决叶片失速问题，提出了提前变桨策略以及叶片根部加装根箱两种解决方案，采用三维数值模拟对这两种方案进行了验证。研究结果表明：采用这两种方案均能减小叶片表面失速分离；采用提前变桨控制策略可提升机组功率约1.78%，叶片根部加装根箱可提升机组功率约2.14%，加装根箱改善失速分离的效果更明显；对于已建成的风场，从经济性考虑，采用提前变桨控制策略解决叶片失速问题效果更好。

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.