摘要
根据风速的大小,实时调整风机以获得最优桨距角是稳定风电功率,抑制桨距角频繁调整的一种常用方法。针对风电机组的高度非线性,提出采用隐式广义预测控制,从而减少模型误差;针对风速的随机性和桨距角机械调整的滞后性会引起桨距角频繁调整、转速和输出功率波动的问题,提出了一种改进的隐式广义预测控制,并结合风速预测对其进行预测补偿。首先对隐式广义预测控制的输出控制量进行联系现在和过去的改进,然后结合短期风速预测对桨距角的预调整进行补偿。仿真结果表明该方法控制效果良好,改进的隐式广义预测控制能够较好地适应不同风速下的风机控制,能够实现桨距角的预调整,同时达到了抑制桨距角的过调整、稳定转速和输出功率的目的。
According to the wind speed,adjusting the wind turbines in real time to obtain the optimal pitch angle is a common method to stabilize the output power,suppress the frequent adjustment of the pitch angle.For the high nonlinearity of wind turbines,implicit generalized predictive control was proposed to reduce the model error.The randomness of wind speed and the hysteresis of mechanical adjustment of pitch angle can cause frequent adjustment of pitch angle,speed and output power fluctuation.An improved implicit generalized predictive control was proposed,which was combined with wind speed prediction to predict and compensate.First,the output control quantity of the implicit generalized predictive control was correlated with the current and past improvements,and then the short-term wind speed prediction was used to compensate for the pre-adjustment of the pitch angle.The simulation results show that the proposed method has good control effect,and the improved implicit generalized predictive control can better adapt to the wind turbine control under different wind speeds.The pre-adjustment of the pitch angle can be achieved,and the purpose of suppressing the over-adjustment of the pitch angle,the stable rotation speed and the output power was achieved.
作者
张家清
施伟锋
ZHANG Jiaqing;SHI Weifeng(Shanghai Maritime University,Shanghai 201306,China)
出处
《微电机》
北大核心
2020年第5期78-84,共7页
Micromotors
关键词
隐式广义预测控制
风电机组
桨距角
功率波动
预测补偿
implicit generalized predictive control
wind turbine
pitch angle
power fluctuations
predictive compensation
