Ant colony PID individual pitch control method of large wind turbine unit

Abstract

The invention discloses an ant colony PID individual pitch control method of a large wind turbine unit. The method includes the following steps that a load model of the wind turbine unit is built, beating moments of blades of the wind turbine unit under a rotating coordinate system are calculated, and the beating moments are subjected to Colman coordinate transformation and transformed into the yawing bending moment and the pitching bending moment under the coordinate axis d and the coordinate axis q; individual variable pitch angles under the coordinate axis d and the coordinate axis q are obtained through an ant colony PID controller and then transformed to optimized pitch angles of the different blades through Colman inverse transformation, the optimized pitch angles and a unified variable pitch angle are subjected to comparative analysis, a pitch angle control signal is obtained, and execution actions of individual pitch control of the wind turbine unit are competed. The control method combines an intelligent algorithm with the traditional PID controller, has self-adaptability, is good in static performance, improves the dynamic performance of a pitch control system of the wind turbine unit, reduces unbalanced loads of key components of the wind turbine unit, and prolongs the service life of a draught fan.

Description

technical field [0001] The invention relates to the field of large-scale wind turbine control, in particular to an ant colony PID independent pitch control method for large-scale wind turbines. Background technique [0002] As the disadvantages of conventional energy appear, renewable energy has been paid more and more attention by human beings. Due to its mature technology and strong flexibility, wind power has become one of the fastest growing renewable energy sources. In recent years, wind turbines have been developing in the direction of large-scale, and the diameter of the impellers has been increasing. The fatigue failure of wind turbines caused by unbalanced loads on the impellers has become the main source of wind power operation and maintenance costs. The independent pitch control method can reduce the unbalance of the fan caused by the turbulent flow characteristics of the wind speed, wind shear and tower shadow effect by fine-tuning the fan blades separately, whil...

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Problems solved by technology

Most of these studies are at the stage of theoretical guidelines, and are highly targeted, and have not fully considered the nonlinear factors of wind turbines, and are immature.

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