针对额定风速附近功率/扭矩控制技术在大型风电机组上的适用性难题,提出一种针对 大型风电机组的满发段输出功率与载荷协同模糊控制策略。首先,利用模糊算法对风电机组满发段的转速变化趋势进行智能判断;接着,提出最大/最小扭矩系数及功率切换系数,并根据风电机组的转速变化趋势灵活选择控制策略,实现恒功率与恒扭矩控制的有机融合;最后,通过仿真实验验证所提方法的有效性。该方法不仅能保持输出功率的相对稳定,确保风电机组及电网的安全运行,还能有效降低风电机组大部件的疲劳载荷,从而延长风电机组的使用寿命。
Abstract
Because of the applicability challenges of power/torque control technology near the rated wind speed for large wind turbines, this paper proposes a fuzzy-based electrical power and load cooperative control strategy for large wind turbines in the full-generation stage. Firstly, a fuzzy algorithm is used to intelligently judge the rotation speed change trend of the generator's speed change during full-generation stage. Secondly, maximum/minimum torque coefficients and power switching coefficients are proposed, and different control strategies are flexibly selected based on the trend of rotation speed change of generat or. That achieve the organic combination of constant-power and constant-torque control method. Finally, the effectiveness of the proposed method is verified through simulation experiments. This method can not only maintain relatively stable of electrical power and ensure the operation safe of wind turbines and the grid, but also effectively reduce the fatigue loads on the major components of wind turbines, which can extend its service life.
关键词
风电机组 /
模糊控制 /
载荷控制 /
满发段控制策略 /
恒功率控制 /
恒扭矩控制
Key words
wind turbines /
fuzzy control /
load control /
full-generation-stage control strategy /
constant-power control /
constant-torque control
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