定桨距变速风力发电机组的控制策略研究

提出定桨距变速风力发电机组的串级控制。外回路根据机组的运动方程采用自适应最优模糊控制,给出发电机电磁转矩设定值,实现参考转速的渐进跟踪。算法综合考虑风力发电机组的机械特性和电气特性,系统辨识作为控制算法的一部分自动执行。内回路基于双馈发电机的定子磁场定向矢量控制系统模型,结合动态线性化和反馈稳态解耦技术,提出发电机有功、无功功率的预测函数控制。采用 PI 控制与本文的控制策略作对比仿真,结果表明提出方法的有效性。

Control strategy for variable speed fixed pitch wind turbines

Cascade control is proposed for VSFP wind turbines.In the outer loop,adaptive optimal fuzzy system is presented based on the motion equation of wind turbine and generator.This method is shown to be able to present generator torque reference and achieve smooth and asymptotic rotor speed reference tracking.The algorithm synthesizes the mechanical and electrical characteristics.System identification is part of the controller.In the inner loop,predictive functional control(PFC)is proposed for active power and reactive power of doubly-fed induction generator based on the stator flux-oriented vector control model combining with the dynamic linearization and decoupling state feedback.Traditional PI controller is compared with proposed control strategy in simulation environment.Simulation results verify the effectiveness of proposed methods.