The invention discloses a decoupling method for control over the rotating speed of a floating type double-impeller wind turbine generator and motion of a floating platform. Theta ave is set as the weighted average of the blade angle average theta mean1 of an impeller 1 and the blade angle average theta mean2 of an impeller 2, Wave is set as the weighted average of the generator rotating speed W1 of the impeller 1 and the generator rotating speed W2 of the impeller 2, two sets of PID control parameters are configured for a variable pitch controller and are the PIDfast parameter and the PIDslowparameter respectively, the PIDfast parameter is used for controlling rotating speed fluctuation, and the PIDslow parameter is used for restraining motion of the floating platform. When the value of theta ave filtered by a first-order low-pass filter is larger than 20 degrees or the value of theta ave filtered by the first-order low-pass filter is larger than 10 degrees and Wave is larger than 9%of a rated rotating speed, the variable pitch parameter is switched to PIDfast from PIDslow, and the condition that the variable pitch parameter is switched to PIDslow from PIDfast is that when the requirements are not met and preset time is delayed, smooth transition of rotating speed control and motion control of the floating platform is achieved through switching of the two sets of PID controlparameters.
本发明公开了一种漂浮式双叶轮风电机组转速与浮台运动控制的解耦方法,设定θave为叶轮1桨叶角度均值θmean1和叶轮2桨叶角度均值θmean2的加权平均值,Wave为叶轮1发电机转速W1和叶轮2发电机转速W2的加权平均值,并为变桨控制器配置两套PID控制参数,分别为PIDfast参数和PIDslow参数,PIDfast参数是用于控制转速波动,PIDslow参数是用于抑制浮台运动,当θave经过一阶低通滤波器滤波后的值大于20°或滤波后的值大于10°且Wave大于额定转速的9%之后,变桨参数由PIDslow切换到PIDfast,而由PIDfast切换回PIDslow的条件则是当上述要求不满足且延迟预设时间之后,通过两套PID控制参数的切换,实现了转速控制与浮台运动控制的平稳过渡。
Decoupling method for control over rotating speed of floating type double-impeller wind turbine generator and motion of floating platform
漂浮式双叶轮风电机组转速与浮台运动控制的解耦方法
24.11.2020
Patent
Elektronische Ressource
Chinesisch
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