Nonlinearity pitch angle control method capable of reducing wind turbine generator loads
A technology for a wind turbine and a control method, which is applied in the control of wind turbines, wind energy power generation, wind turbines, etc., can solve problems such as difficult practical application and complex control methods.
Inactive Publication Date: 2014-03-12
TSINGHUA UNIV
View PDF5 Cites 8 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The literature "D.Schlipf, D.J.Schlipf and M.Kühn.Nonlinear model predictive control of wind turbines using LIDAR[J], Wind Energy, 2012." uses the nonlinear model predictive control method to optimize the load control of wind turbines, but the proposed The control method is complex and difficult to be practically applied
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0038] The non-linear pitch angle control method for reducing the wind turbine load proposed by the present invention, the control principle diagram is as follows figure 1 As shown, the specific implementation is described in detail as follows:
[0039] 1) Obtain the aerodynamic torque characteristic function M of the wind turbine a (Ω,β,v 0 ), aerodynamic thrust characteristic function F a (Ω,β,v 0 ), the transformation ratio i of the gearbox, the rated electromagnetic torque of the generator Wind wheel rated speed Ω * and the natural frequency f of the tower front and rear vibration modes T , where: Ω is the measured value of the rotor speed, β is the measured value of the pitch angle, v 0 It is the effective wind speed measurement value of the wind rotor (the above data are provided by the wind turbine manufacturer);
[0040] 2) The encoder is used to measure the speed of the wind rotor, and the cut-off frequency is 3Ω * After a low-pass filter of / 2π, the measured...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a nonlinearity pitch angle control method capable of reducing wind turbine generator loads, and belongs to the technical field of wind power generation. A transmission shaft serves as a pseudo-linear system with the pneumatic torque as the control input, the order value of the pneumatic torque is calculated through the proportional integral and the feed-forward algorithm, and the pitch angle order value for the revolving speed adjustment is obtained through the inverse method. A tower serves as a pseudo-linear system with the pneumatic pushing force as the control input, the pneumatic pushing force order value is the sum of the steady state order value and the small signal order value, and the pitch angle order value taking the tower vibration damping into consideration is obtained through the inverse method. After the series connection lead compensation link is carried out on the obtained pitch angle order value, the ultimate pitch angle control order value is obtained to control the pitch angle of a wind generation generator. The loads of the wind turbine generator are effectively reduced while the revolving speed of the wind turbine generator is controlled to be constant, operating and maintaining cost of the wind turbine generator can be reduced, the service life of the wind turbine generator can be prolonged, and the nonlinearity pitch angle control method is suitable for engineering application.
Description
technical field [0001] The invention belongs to the technical field of wind power generation, in particular to a nonlinear pitch angle control method for reducing the load of a wind turbine. Background technique [0002] In recent years, with the continuous increase of the single unit capacity of wind turbines, the size and weight of mechanical parts of wind turbines have also increased. On the one hand, with the continuous increase in the size of mechanical parts of wind turbines, the loads borne by the wind turbines have become larger and more complex. On the other hand, the increase in the weight of mechanical parts will lead to an increase in the cost of the whole machine. Manufacturers of wind turbines generally control the cost of the whole machine by reducing the weight of parts, which leads to an increase in the flexibility of mechanical parts. During long-term operation, under the action of relatively large and complex loads, the flexible parts of the wind turbine ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 肖帅耿华杨耕
Owner TSINGHUA UNIV