Method for Correcting Measured Power Curve of Wind Turbine Using Measured Turbulence Intensity
A technology for wind turbines and turbulence intensity, which is applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., and can solve the problems of difficult selection of differential step size and inapplicability.
Active Publication Date: 2016-06-15
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The main limitations of this method are: (1) The model assumes that the wind speed and power obey the Gaussian distribution, and appropriate correction coefficients are required to make the results more accurate; (2) It is a challenge to select an appropriate bin interval when dividing the power into bins ; (3) When calculating the offset coefficient, it is not easy to choose an appropriate differential step size
The main limitation of this method is that it is not suitable for the entire wind speed segment
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
[0021] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0022] figure 1 It is a flowchart showing a method of correcting a measured power curve (PowerCurve, PC) of a wind turbine using a measured turbulence intensity (Turbulence Intensity, TI) according to the present invention.
[0023] refer to figure 1 , at step 101, a two-parameter Weibull frequency function of wind speed for a predetermined time step is determined. Here, the predetermined time step is the time step specified in fan design and test specifications, for example, it may be 10 minutes (10 minutes), and the present invention will be described below taking 10 minutes as an example. However, it should be understood that in the present invention, the predetermined time step is not limited to 10 minutes, and can be properly selected according to specific needs.
[0024] The 10-min two-parameter Weibull frequency function f(v) of the wind speed ...
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 provides a method for correcting a measured power curve of a wind driven generator through accurately measured turbulence intensity. The method comprises the following steps that (1) a scheduled time step two-parameter Weibull frequency function of wind speed is confirmed; (2) an initial static power curve of the wind driven generator is confirmed; (3) a corrected static power curve of the wind driven generator is confirmed through the two-parameter Weibull frequency function and the initial static power curve; (4) a final static power curve of the wind driven generator is confirmed through the two-parameter Weibull frequency function and the corrected static power curve; (5) the power curve of the wind driven generator under the reference turbulence intensity is confirmed through the actually measured turbulence intensity, the two-parameter Weibull frequency function and the final static power curve.
Description
technical field [0001] The invention belongs to the field of wind power generation, and relates to a method for correcting a measured power curve of a wind power generator by using actually measured turbulence intensity. Background technique [0002] The power curve of a wind turbine (fan for short) is usually affected by the intensity of air turbulence. In order to solve the problem that the power curve of the wind turbine is affected by the turbulence intensity, K.Kaiser, H.Hohlen, W.Langreder et al. analyzed the influence of the turbulence intensity on the power curve in "Turbulence correction for power curves, proceeding of EWEC2003, Madirid", and gave A method for solving Taylor series equations using the method of least squares. However, this method is not suitable for the case where the difference between the corrected turbulence intensity and the measured turbulence intensity is large. [0003] AxelAlbers, TimJakobi, RolfRohden and others analyzed the turbulence in...
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 Patents(China)
IPC IPC(8): G06F19/00
Inventor 李翠萍
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD