Model predictive control (MPC) yaw control method based on multistep prediction

Abstract

The invention discloses a model predictive control (MPC) yaw control method based on multistep prediction. The MPC yaw control method based on multistep prediction comprises the steps that selecting acontrol period and a prediction length m; acquiring predicted wind direction information; obtaining a feasible solution sequence corresponding to an m-step yaw prediction model based on an exhaustivesearch method; solving the m-step yaw prediction model by utilizing the predicted wind direction information and the feasible solution sequence; and solving the corresponding performance of each feasible solution sequence, and selecting the feasible solution sequence with the best performance as control output. The MPC yaw control method based on multistep prediction is simple in solving process,can be universal in a yaw control system based on MPC, and can fully utilize the potential performance of the yaw control system based on MPC.

Description

technical field [0001] The invention relates to the field of industrial control, in particular to a yaw control method based on a multi-step prediction model predictive control MPC. Background technique [0002] Modern large-scale horizontal axis wind turbines are generally installed with a yaw control system, the purpose of which is to make the nacelle rotate around the axis of the wind rotor, so that the swept area of ​​the wind rotor can stably point to the direction of the incoming wind, thereby increasing the capture of wind energy. The wind turbine incorporates the wind direction information obtained by the wind vane into the active yaw control strategy, and its industry mainly adopts the logic-based yaw control method. However, the wind direction values ​​used in this method are usually mixed with noise and are easily affected by the operation of the wind turbine. For this reason, some scholars propose to use the hill climbing method (HCM, Hill Climbing Method) to fi...

AI Technical Summary

Problems solved by technology

However, in the existing theoretical methods that apply MPC to the yaw control system, the continuous MPC is used, which requires a complex quadratic programming solver to solve; at the same time, the existing methods all assume that the yaw system The speed is continuously adjustable, and does not consider the constraints of the yaw system hardware on the yaw speed

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