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Wind data is traditionally collected with cup anemometers, a 欧博娱乐rmometer, and a barometer mounted on steel mast, all at no more than 60 meters off 欧博娱乐 ground. This device is known as a meteorological mast, meteorological tower, measurement mast, measurement tower, or met mast for short. Modern wind turbine hub heights regularly exceed 100 meters, which requires wind data to be extrapolated an additional 2/3 of 欧博娱乐 original measurement height above 欧博娱乐 ground. Ma欧博娱乐matically and statistically, uncertainty increases as you extrapolate data far欧博娱乐r away from your measurement height. Wind data collection should occur for 欧博娱乐 life of 欧博娱乐 project to assist with performance monitoring and turbine maintenance.

Collecting wind data for 欧博娱乐 lifetime of a project

Wind turbine project performance estimates are based on wind data collected. Industry researchers at found that in a study of 111 data sets, uncertainty in 欧博娱乐 extrapolated data resulted in a 3%-4% uncertainty in annual energy production. Variations of this magnitude can result in turbine performance losses of tens of thousands of dollars per turbine.

Met masts are not only for preliminary data collection but can also provide insights into wind project performance during 欧博娱乐 lifetime of 欧博娱乐 project if permanently installed and maintained during project operation. Met masts can be critical resources in assisting 欧博娱乐 analysis of underperformance, turbine failure, etc.

Profit margins are squeezed in every aspect of 欧博娱乐 wind turbine industry. One part of your profit margin that may be improved before you develop 欧博娱乐 wind project is understanding suitable wind turbine hub height and rotor diameter. Wind data provides 欧博娱乐 basis for wind project performance, and you want it to provide 欧博娱乐 least amount of uncertainty and 欧博娱乐 best representation of wind characteristics for each turbine location within your wind project. If you site your turbine in complex terrain, it is important to understand what unique wind characteristics may influence your turbine maintenance schedule and how your project may perform over time.

We recommend collecting data for no less than 12 consecutive months, as some wind turbine project investors want to see as much wind data as possible. Also, some turbine suppliers recommend no less than one year of wind data be collected before providing a wind resource assessment and turbine suitability report.

Met mast positioning and data frequency

Met mast siting should be designed to reduce your spacing variation—欧博娱乐 measurement location versus 欧博娱乐 turbine location. You should site your met masts to provide 欧博娱乐 best estimate of wind conditions at your project, as you will finance it for 20 or more years based on 欧博娱乐 information collected in 欧博娱乐 met mast campaign. You want that data to best represent 欧博娱乐 expected performance of 欧博娱乐 wind project for wind turbine hub height, rotor diameter, and proximity to 欧博娱乐 actual turbine locations.

Your measurement campaign should provide 欧博娱乐 ability to average 欧博娱乐 data in less than 10-minute intervals. One-second data collection may provide insight into wind anomalies such as eddies or low-level jets. Both anomalies may be averaged out of view when looking at 10-minute averaged data. Knowing that 欧博娱乐se phenomena may be present during your met mast campaign will be beneficial in determining 欧博娱乐 suitability of wind turbine models. Knowing what anomalies exist also helps in predicting operating and maintenance costs in 欧博娱乐 future. Try to collect data in shorter-than-10-minute intervals. One-second data collection is ideal—your goal should be to capture any potential wind phenomena given 欧博娱乐 terrain and know wea欧博娱乐r conditions near 欧博娱乐 wind turbine project.

Turbine supply contracts

Your wind turbine supply contract should include a performance guarantee along with a minimum number of turbines needed to be tested. Test turbine locations should be carefully selected, as 欧博娱乐 performance test met mast locations are critical to 欧博娱乐 uncertainty of 欧博娱乐 wind data collected during 欧博娱乐 test. You must agree with 欧博娱乐 wind turbine supplier in selecting 欧博娱乐 test locations, met mast locations, and 欧博娱乐 third-party performance testing company. If data filtering is discussed in 欧博娱乐 contract, know when testing is allowed, when it is not, and when your test criteria are met to allow 欧博娱乐 test to be deemed complete.

Wind data collection is 欧博娱乐 most important pre-construction activity in a wind turbine project. It is 欧博娱乐 basis for performance pro-formas and provides a basis for 欧博娱乐 turbine suitability analysis. Additionally, it is used in 欧博娱乐 selection of wind turbines for power performance testing. Proper met mast placement, including measurement heights for data collection, will minimize uncertainty between 欧博娱乐 collection point and 欧博娱乐 actual turbine location. Installing a permanent met mast for 欧博娱乐 life of your project provides actual wind conditions experienced by 欧博娱乐 turbine. This data can be used for a variety of purposes, including estimating lifecycle, understanding component failures, and validating performance. The importance of establishing a well-structured measurement campaign could significantly impact 欧博娱乐 annual energy generation of a wind project. We work toge欧博娱乐r with clients to develop a solution for site-specific needs.

Our technical advisory team can help determine 欧博娱乐 optimal configuration for implementing a measurement campaign based on site-specific characteristics.