基于NMPC-PID的大型风力机独立变桨控制

Independent Pitch Control of Large Wind Turbine Based on NMPC-PID Method

大型风力机的不平衡载荷会使叶片断裂,造成事故从而减短其使用寿命。针对大型风力发电系统在高风速区的不平衡载荷问题,提出一种NMPC-PID的独立变桨载荷控制方法。非线性模型预测控制(NMPC)用于及时调整风机桨叶的桨距角,PID控制则用于消除塔架振动的影响。运用机制方法在仿真平台搭建风力发电系统模型,运用所提控制策略进行仿真实验,并在两种情况下与模型预测控制方法(MPC)进行对比,验证了所提控制策略的可行性与有效性。

The unbalanced load of large wind turbines can cause break of blades, causing accidents and shortening their service life.Aiming at the unbalanced load problem of large-scale wind power generation system in high wind speed area, a load control method called NMPC-PID with independent pitch control was proposed.Non-linear model predictive control was used to adjust the pitch angle of the wind turbine blades in time, and PID control was used to eliminate the influence of tower vibration.The mechanism method was used to build a wind power generation system model on the platform, and the proposed control strategy was used on the model to carry out simulation experiments.In the two cases, it was compared with model predictive control(MPC) to verify the feasibility and effectiveness of the proposed control strategy.