An ant colony PID independent pitch control method for large wind turbines
A wind turbine, independent pitch technology, which is applied in the control of wind turbines, engine control parameters, wind power generation, etc., can solve the problems of immaturity and the non-linear factors of wind turbines are not fully considered.
Active Publication Date: 2018-11-06
HUNAN SHIYOU ELECTRIC PUBLIC
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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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[0053] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0054] like figure 1 Shown, the present invention comprises the following steps:
[0055] 1) Establish the load model of the wind turbine, and calculate the flapping moment M of the blade rotation coordinate system of the wind turbine 1 , M 2 , M 3 ;
[0056] In order to better control the load of the wind turbine and stabilize its vibration state, that is, the power, the selected control objects are the output power of the generator, the torque of the wind rotor, the speed and the load. Firstly, the load model of the wind turbine is established. The linear model of is:
[0057] ΔM 1 =kβ 1 +hw 1
[0058] ΔM 2 =kβ 2 +hw 2
[0059] ΔM 3 =kβ 3 +hw 3
[0060] Among them, ΔM 1 , ΔM 2 , ΔM 3 are the variations of the root bending moments of the three blades; β 1 , β 2 , β 3 are the pitch angles of the three blades; the coefficients k an...
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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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IPC IPC(8): G06F17/00F03D7/02F03D7/04
CPCF03D7/0224F03D7/044F05B2270/32Y02E10/72
Inventor 周腊吾邓宁峰陈浩韩兵田猛
Owner HUNAN SHIYOU ELECTRIC PUBLIC