变速风力发电机最大风能捕获非线性控制  

Nonlinear Control of Maximum Wind Energy Capture for Variable-speed Wind Turbines

作　　者：曹临熙 王良勇 赵磊 CAO Lin-xi;WANG Liang-yong;ZHAO Lei(State Key Laboratory of Synthetical Automation for Process Industries,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学流程工业综合自动化国家重点实验室,辽宁沈阳110819

出　　处：《控制工程》2021年第8期1534-1539,共6页Control Engineering of China

基　　金：国家自然科学基金资助项目(61673095)。

摘　　要：以实现变速风力发电机最大风能捕获为目标,结合其机械惯量大和传动轴柔性的特点,提出一种由内外环两层结构组成的非线性控制策略,在提高风能捕获效率的同时降低机械瞬态负载。内环为稳定转速控制器。外环由叶尖速比反馈补偿器、转子转速预设定模型和转速设定平滑模块组成。通过对外环到内环设定转速进行平滑处理,减小了风速剧烈变化对设定转速的扰动,降低了机械负载。最后,以风力发电机两质量模型为对象进行仿真实验。实验结果验证了所提控制策略的有效性与可行性。In order to achieve the maximum wind energy capture of variable-speed wind turbines,combining with the characteristics of large mechanical inertia and flexible drive shaft,a nonlinear control strategy is proposed to improve the wind energy capture efficiency and reduce the mechanical transient load.The strategy consists of inner ring structure and outer ring structure.The inner ring is a stable speed controller.The outer ring consists of a feedback compensator of tip speed ratio,rotor speed preset model and a module for smooth speed.By smoothing the set speed from the outer ring to the inner ring,the disturbance caused by the drastic change of wind speed to the set speed is reduced and the mechanical load is reduced.Finally,the simulation experiment is performed on the two-mass model of the wind turbine.The experimental results verify the effectiveness and feasibility of the proposed control strategy.

关 键 词：变速风力发电机 最大功率点跟踪 非线性控制 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]