Whale group PID independent pitch control method for large wind turbine unit

Abstract

The invention relates to a whale group PID independent variable-pitch control method for a large wind turbine unit. The whale group PID independent variable-pitch control method comprises the following steps of calculating the bending moment of all blades in the direction perpendicular to an impeller surface by means of a blade load model; conducting MBC coordinate transformation on the bending moment, perpendicular to the impeller surface, of all blades, and obtaining the pitching moment and the yaw moment in a coleman coordinate system; obtaining influence angles used for eliminating the pitching moment and the yaw moment through a whale group PID controller algorithm; and obtaining the pitch angle increment of all the blades, superimposing the pitch angle increment with the uniform variable-pitch angle, obtaining individual variable-pitch pitch angles of all the blades, and completing independent variable-pitch operation through a variable pitch driver. By optimizing the whale groupalgorithm, the good dynamic performance on the aspect of PID parameter setting precision and stability is achieved, the unbalanced load of the unit is effectively reduced, the vibration of the unit is reduced, more stable and smooth output power is ensured, and the life of the unit is prolonged.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to an independent pitch control method for large-scale wind turbines. Background technique [0002] Wind energy is a safe and ecological renewable energy source. The variable-pitch wind turbines have a high utilization efficiency of wind energy and occupy a dominant position in the market. There are mainly two ways of pitch control: unified pitch and independent pitch. Unified pitch control assumes that the wind speed in the rotation plane of the wind rotor is uniform, but with the increase of the diameter of the wind rotor, factors such as wind shear, tower shadow effect, yaw error and other factors increase the unbalanced force on the wind rotor surface , the additional load is also increasing, which seriously affects the safe operation of the unit and the service life of the components. At present, the rapid growth of the wind energy market requires complete machine manufac...

AI Technical Summary

Problems solved by technology

The focus of PID control algorithm research is the parameter tuning method of the PID controller. The PID parameter tuning problem is a typical multi-modal optimization problem, and the optimal solution is difficult to solve.

However, the existing PID parameter tuning methods do not have a good solution for this multi-modal optimization problem, and cannot guarantee the quality of the solution.

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