Method and system for restoring operating wind speed of wind farm in complex terrain to free-stream wind speed

By constructing the wind direction structure and wake loss matrix of wind farms, the accuracy of wind energy resource analysis and wind power prediction in complex terrain wind farms is solved, and the accurate reduction of wind energy resource analysis and wind power prediction in wind farms is achieved, which is suitable for wind farm transformation and upgrading and wind power prediction under complex terrain conditions.

WO2025138063A1 Publication Date: 2025-07-03POWERCHINA JIANGXI ELECTRIC POWER ENGINEERING CO LTD
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Patent Information

Application Number
PCT/CN2023/143041
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-12-28
Filing Date
2023-12-29
Publication Date
2025-07-03

AI Technical Summary

Technical Problem

In the prior art, in complex terrain wind farms, the accuracy of wind energy resource analysis and wind power prediction is insufficient, and it is impossible to effectively restore the operating wind speed of each wind turbine to the free wind speed, resulting in low accuracy of wind farm transformation and upgrading and wind power prediction.

Method used

By constructing the wind direction structure and wake loss matrix of the wind farm, based on the wind direction combination structure, selecting representative camera positions, conducting consistency inspection and correction of the wake loss matrix, accurately reducing the operating wind speed of each wind turbine to the free wind speed.

Benefits of technology

The accuracy of wind energy resource analysis and wind power prediction of wind farms has been improved, and an accurate wind energy resource analysis and wind power prediction solution is provided for the "large upper pressure and small" transformation and upgrading of wind farms, which is suitable for wind farm transformation and upgrading and wind power prediction under complex terrain conditions.

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Abstract

The present invention relates to a method and system for restoring an operating wind speed of a wind farm in a complex terrain to a free-stream wind speed. The method comprises: selecting operating wind speed, wind direction and generated active power data series from wind turbines of a wind farm, a wind speed, wind direction, air temperature and air pressure data series from a wind power prediction tower, and a wind speed and wind direction data series from a numerical weather prediction; on the basis of operation data of the wind farm, dividing the wind farm into wind areas on the basis of wind directions; on the basis of the divided wind areas, selecting representative turbine locations, which represent the wind direction of the wind farm; on the basis of a representative turbine wind direction, constructing a wind direction structure of the wind farm, establishing a wake loss matrix of the wind direction structure of the wind farm, and performing consistency checking and correction; and on the basis of the wind direction structure of the wind farm and the corresponding wake loss matrix, restoring the operating wind speed of each wind turbine to a free-stream wind speed. The invention achieves high operability, and can accurately calculate a wake loss of an operating wind speed of each turbine location of a wind farm, thereby improving the accuracy of restoring the operating wind speed of each wind turbine to a free-stream wind speed.
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