双馈式变速变桨风电机组的桨距控制

Pitch control of doubly-fed variable-speed and variable-pitch wind turbine units

针对大型双馈式变速变桨(variable-speedandvariable-pitch,VSVP)风力发电机组在额定风速以上如何维持输出电功率稳定和降低塔架振动等问题,对其控制技术进行研究。在研究传统变桨距控制策略的基础上,提出非线性转矩的统一变桨距控制策略。针对风电机组的塔架前后和侧向振动,提出基于加速度反馈的桨距和转矩阻尼滤波控制方式。以2 MW变速变桨风力发电机组为验证对象,基于Bladed软件平台对该控制策略与传统的变桨距控制策略进行仿真比较。结果表明:所提出的控制策略能够稳定电功率输出,降低塔架振动和载荷。

For a large doubly-fed VSVP （variable-speed and variable-pitch） wind turbine to maintain stable power output and reduce tower vibration, a nonlinear torque control strategy was proposed based on the traditional pitch control method. To reduce tower fore-aft and side-side vibrations, the acceleration-based pitch and torque control strategy was put forward and the simulation was made on the proposed control strategy for a 2 MW VSVP wind turbine with Bladed software. Study results indicate that the proposed strategy can better stabilize power output and reduce tower vibration and load than the traditional method.