Method for identifying and setting parameters of wind generating set controller

Abstract

The invention discloses a method for identifying and setting parameters of a wind generating set controller, and belongs to the technical field of control over a wind generating set. The method comprises the steps that a Bladed software model is utilized for being linearly combined with a model order reduction algorithm to build a unit linear model suitable for setting the parameters; and then, according to the wind speed distribution probability of a wind field, optimal setting and comprehensive calculation of PI parameters of the controller are carried out, and on the basis of a parameter identifying result of Bladed software, an optimum rotary speed-torque control gain coefficient and a gain factor in self-adaptation variable pitch control are calculated. Identifying of related parameters such as a largest wind energy utilization coefficient, an optimum tip-speed ratio and an optimal propeller pitch angle is carried out according to a Bladed simulation model built according to unit equipment parameters, and the important prerequisite condition is provided for control over maximal wind energy capture of the unit is provided; the self-adaptation variable pitch control is achieved, and the robustness of a common PI variable pitch controller is improved; and the guidance is provided for design and optimization of the controller, and the method has the higher practical and reference value.

Description

technical field [0001] The invention belongs to the technical field of wind power generating set control, in particular to a parameter identification and setting method for a wind power generating set controller. Background technique [0002] At present, large-scale megawatt-level wind turbines all adopt variable-speed and variable-pitch control technology. A typical control system structure is as figure 1 . Due to the large-scale random variation of natural wind, the role of the controller is divided into pitch control and torque control according to the different operating conditions of the unit. The torque control loop is effective below the rated value, and the speed is controlled by changing the torque, while the pitch angle remains the same to achieve the maximum wind energy tracking; otherwise, the pitch control loop is effective, and the pitch angle is controlled by changing the pitch angle. Speed, while the torque remains rated to achieve constant power control. ...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to propose a method for identification and tuning of wind turbine controller parameters, which is characterized in that, aiming at the problem that wind turbine controller parameters are not easy to calculate and tune in the design and optimization process, the Bladed software model is used to linearize Combined with the model reduction algorithm, the unit linearization model suitable for parameter setting was established, and then the optimal setting and comprehensive calculation of the controller PI parameters were carried out in combination with the wind speed distribution probability of the wind field, and the torque control was calculated based on the parameter identification results of the Bladed software. Parameters such as the optimal gain coefficient and the gain factor of adaptive pitch control; the specific steps of the wind turbine controller parameter identification and tuning method are as follows:

Images