How to achieve a high standard of wind resource assessment?

Wind resource assessment runs through the entire wind power life cycle, and is a key link in determining wind turbine selection, turbine layout scheme and annual power generation calculation. In other words, only by fully grasping the wind resources of the wind farm can we assess its utilization value to determine whether the wind power project is feasible.

In other words, achieving a high standard of wind resource assessment can reduce the uncertainty of wind power operation, reduce project risks, and maximize its return on investment! Specifically, you can pay attention to the following aspects:

First, the macro location of wind farms:
The wind farm site should be located in an area with abundant wind energy resources and good wind quality, and should meet the requirements of national industrial policies and regional industrial planning, and also ensure that the wind farm can be connected, sent, and implemented three principles, and should also have transportation and construction and installation conditions.

Note: The location of wind farms should focus on avoiding areas with more serious natural disasters, and also meet the relevant requirements of environmental protection. A more critical point, which is also the point that wind power developers care about the most, is that the return on capital of wind farms cannot be less than 8%.

Second, the location and height of the wind tower
1. When selecting the location of the wind tower, its observation point should be representative, away from tall trees and obstacles, and should follow the requirements of being above the main wind, the highest point at the altitude, avoiding low-lying terrain and not occupying the position.

2. When selecting the height of the wind tower, attention should be paid to the low wind speed area, because the large blade fan is often used, the hub height will be high, then the height of the wind tower needs to stand higher; In flat inland areas, the greater the wind shear (greater than 0.12), in order to increase the power generation, the height of the wind turbine hub will also increase, and the height of the wind tower should also increase accordingly.

In fact, if the wind tower with a higher height is erected regardless of cost or other constraints, so that the height covers the upper extension area of the wind turbine blades, the captured wind measurement data is more complete and accurate.

Third, choose wind measurement equipment with high accuracy and small error

At present, the wind measuring equipment selected for onshore and offshore wind power projects mainly includes: wind towers, lidar, acoustic radar, etc. Speaking of wind towers alone, the measuring instruments (anemometers, wind vanes, etc.) used are the most core components, and the higher the accuracy and the smaller the error, the better the quality of the captured wind data.

In short, the more high-end the wind measurement equipment, the more accurate and reliable the wind measurement data.

Due to the rugged and complex terrain, harsh and changeable climate, and tight development period, some wind towers cannot meet their observation requirements, and the advantages of radar wind measurement increase significantly.

Radar mobile observation technology can realize mobile wind measurement at each wind turbine point in the wind farm area, and the wind measurement data captured is more complete and accurate.

In fact, wind resource technology has transitioned from single measurement to combined measurement in the past, with the combination scheme of wind tower + mesoscale model + radar wind measurement as the main scheme, so that the wind resource assessment is more comprehensive.