in News Departments > New & Noteworthy
print the content item



A wind consortium says it has successfully deployed a power curve measurement procedure that analyzes power output in constantly changing conditions.

The procedure is part of a consortium comprising DTU Wind Energy, DONG Energy, Siemens Wind Power and Avent Lidar Technology. The Danish Energy Technology Development and Demonstration Program provided funding for the three-year effort.

According to Avent, which recently mounted its WindIris LIDAR system atop a Siemens turbine at the 367 MW Walney Wind Farm, the procedure is an upgrade to using met masts, the traditional method to measure power performance.

"Measurements of wind turbine power curves are a key issue for the wind industry," explains Thomas Velociter, CEO at Avent. "But conducting power performance verifications with met-masts is often difficult and extremely expensive, particularly offshore or in onshore complex terrains, which means that verifications and measurements are sometimes skipped all together.

He says that nacelle-mounted LIDARs allow for accurate and affordable measurements, resulting in reduced cost of energy and increased competitiveness.

The technology has been submitted to the expert and standardization groups Measnet and IEA Task 32 in order to be upgraded to an internationally recognized standard. It opens new possibilities for cheaper and more frequent power performance measurements.

According to Avent, the project evolved from a ground-based WINDCUBE LIDAR from Leosphere, which was adapted to be placed on the turbine nacelle for forward looking horizontal measurements. Over the course of the project, several prototypes were developed and tested, and have evolved into a new product called WindIris, which integrates all the elements of the procedure.

The WindIris, manufactured and commercialized by Avent, has been specifically designed for turbine-mounted measurements, which require a product sturdy enough to endure adverse factors, such as nacelle vibrations.

"One of the main challenges was to obtain an equivalent procedure to the IEC 61400-12-1 power performance measurement standard," says Velociter. "To achieve the required level of accuracy and repeatability, the developed procedure accounts for each one of the measurement requirements. For example, it specifies how to measure at hub-height +/- 2.5% at 2.5 rotor diameter in front of the turbine and account for the deviation inherent to the flexibility of the turbine."

Photo caption: The WindIris LIDAR situated atop a Siemens offshore wind turbine.
Photo courtesy of DONG Energy


Trachte Inc._id1770
Latest Top Stories

Utility-Scale Wind And Solar Keep Getting Cheaper

A new study measures the levelized cost of energy from various technologies and suggests that the costs of utility-scale wind and solar power are catching up with those of traditional sources, even without subsidies.


The Song Remains The Same: Ontario Seeks More Science Before Lifting Offshore Ban

The Ontario government says the nearly four-year-old offshore wind moratorium will remain in place until the province fully understands the technology’s impact on the environment.


Why States Should Adopt A Renewable Portfolio Standard

A new study analyzes the potential benefits of state renewable energy mandates, as well as recommends what such policies should include.


Sen. Reid Vows To Bring Wind PTC To A Vote By Year's End

Nevada's senior senator provides some encouragement to wind industry advocates during his annual Clean Energy Summit.


Steadily, Wind Turbine OEMs Resume R&D Investment

An increased commitment to research and development will likely lead to wind energy innovation - not to mention a likely increase in patent-protected technology.

Renewable NRG_id1934
Canwea_id1984
Future Energy_id2008
UnitedEquip_id1995