基于转速分仓的风力机上网功率最大化控制研究

Research on maximum grid power control for wind turbine based on speed division

风力发电机的上网出力是机组核心竞争力的表现。影响发电量的因素繁多,特别是随着叶轮直径越来越大,长柔叶片的变形和整机的非线性损耗对发电量的影响变的不可忽视。叶轮的最大风能吸收捕获能力并不能等同于机组具有最大上网功率的能力。文章统筹气动最优控制和机组损耗控制,从叶片、控制策略理论设计和Bladed仿真分析,得出了不同风速和转速下叶片变形对发电量的影响;并结合机组损耗,提出以上网功率最大化为目标,基于转速进行分仓的动态调整转速-扭矩控制方法。该方法经过现场测试和验证,可显著提升发电量,并具有很强的环境适应性,为发电量最大化提供了更精准的控制方案。

The output power performance is core competitiveness of wind turbine. There are many factors affecting the power generation, especially with the increasing diameter in low wind speed market, the influence of the deformation of long flexible blade and the nonlinear loss of the turbine can not be ignored. The maximum wind energy absorption and capture capacity is not equal to the capacity of the maximum on grid power. In this paper, the aerodynamic optimal control and loss control are integrated. From the blade, control strategy theory design and bladed simulation analysis, the influence of blade deformation on power generation under different wind speed and rotor speed is obtained. Combined with the turbine loss, based on the maximization of grid power and rotor speed division, the dynamic speed torque control method is used. After wind farm test and verification, the method can significantly improve the power generation, and has strong environmental adaptability,which provides a more accurate control scheme for maximizing the power generation.