in News Departments > Projects & Contracts
print the content item

ZephIR Lidar notes that its turbine-mounted Dual Mode (DM) system has been deployed by developer Renewable Energy Systems Ltd. (RES) in a commercial investigation into LIDAR-generated turbine performance measurements.

The trial, which began in June and is expected to end this month, uses a ZephIR DM installed on a Vestas V90 turbine. ZephIR says its DM is capable of measuring upwind and providing absolute (traceable to IEC Standard 61400-12-1CD) and relative power curve assessments.

In non-complex terrain, the company explains, current industry guidelines require measuring the wind at distances of two to four rotor diameters upwind - minimizing blade induction effects on the wind speed.

Complex terrain causes the wind model to evolve as it moves over the landscape approaching the turbine, meaning that the wind and available energy at the turbine rotor can differ significantly from the measurement point, the company adds.

To combat this uncertainty, ZephIR says wind speed can be measured much closer to the turbine. Although these measurements are within the blade induction zone, the company says their repeatability is higher and will be less influenced by the complex terrain. The ZephIR DM and ZephIR 300 LIDAR systems can measure at distances as short as 10 meters and out to 300 meters.

With the ZephIR measuring at 135, 90, 45 and 10 meter ranges in its second phase, the trial exploits the DM’s ability to measure short distances upwind of the turbine within complex terrain to produce power curves, according to ZephIR.

“Traditional methodologies for measuring power curves have practical and technical challenges,” says a spokesperson for RES. “This trial has the potential to change current methodologies, address existing challenges and improve commercial relationships between developers, operators and turbine suppliers by better understanding the relationship between wind and turbine performance.”




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
UnitedEquip_id1995
Future Energy_id2008