Correction method used for prediction of wind speed
A technology for predicting wind speed and correction value, which is used in measurement devices, fluid velocity measurement, velocity/acceleration/impact measurement, etc., to achieve the effect of accurate wind speed forecast, increase the rate of accurate qualification, and reduce errors
Active Publication Date: 2013-10-23
ZHONGNENG POWER TECH DEV
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Problems solved by technology
For the wind speed range of 6m / s to 10m / s, even if there is a small error in the predicted wind speed, the predicted power will have a large deviation. For example, when the error of the predicted wind speed is 1m / s, it will cause 200kw or more power deviation
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Embodiment Construction
[0042] An embodiment of the present invention provides a correction method for predicting wind speed. Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. see figure 2 , the method includes the following steps:
[0043] S200: Obtain the power curve corresponding to different power at different wind speeds through the working data of the wind turbine;
[0044] The wind speed measured by the anemometer of the wind turbine and the actual power of the wind turbine at different wind speeds are stored in the database of the central control system of the wind farm. The power curve can be obtained by using the wind speed and power data of the wind turbine. See figure 1 Curve 2 of the curves shown. The abscissa of the power curve is the wind speed measured by the anemometer, and the ordinate is the actual power of the wind turbine.
[0045] S210: Obtain an error upper limit curve and an error lower limit curve of th...
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The invention provides a correction method used for prediction of a wind speed. The method comprises: A, according to a power curve of a wind generation set and a power error value range of the wind generation set, wherein the power error value range is set in advance, a first correction value and a second correction value of a predicted wind speed are determined; B, when a predicted wind speed value is less than the first correction value, the predicted wind speed value is the first correction value; and C, when the predicted wind speed value is greater than the second correction value, the predicted wind speed value is the second correction value. In addition, the invention provides a correction apparatus for prediction of a wind speed. According to the invention, different correction is carried out on forecasted wind speeds of different wind speed segments; therefore, correction can be carried out on the forecasted wind speeds according to an actual relation between a wind speed and a power of a wind generation set, so that an accurate qualification rate of the forecasted wind speed can be improved; and moreover, an error of the forecasted wind speed is reduced.
Description
technical field [0001] The invention relates to the field of power forecasting in weather forecasting, in particular to a correction method for forecasting wind speed. Background technique [0002] In the power prediction method based on numerical weather prediction, the power prediction result is usually obtained by predicting the wind speed, so the accuracy of the predicted wind speed will affect the accuracy of the predicted power. [0003] From the actual operation of wind turbines, see figure 1 , under different wind speed ranges, the power of wind turbines varies with wind speed. Taking a 1500kw unit as an example, usually in the small wind speed range of 0m / s to 5m / s, the power of wind turbines varies with wind speed. Large, and in the wind speed range from 6m / s to 10m / s, the power of the wind turbine varies greatly with the wind speed. [0004] It can be seen that under different wind speed segments, the error of the predicted wind speed has different influences ...
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IPC IPC(8): G01P5/00
Inventor 孙翰墨韩明朱志成盛迎新申烛孟凯锋岳捷陈欣李闯马龙
Owner ZHONGNENG POWER TECH DEV