Objective
Data from a field programme on a wind farm in Denmark are reported. Frequent measurements of wind speeds and directions at several heights were made inside the wind farm as well as upwind from the farm. Mean power output and power fluctuation levels were also measured. The results have been compared with the simple Risoe Park model for average power output of a wind farm. The model was shown to be capable of accurately modelling the wind farm output.
Turbulence inside the farm was investigated in detail. The average levels of turbulence in such a farm seem to reach an equilibrium level at 30 m (somewhat above hub height) and are still increasing with height. The spectral decomposition of the turbulent velocity fluctuations showed that the main amount of excess energy inside the farm was found at a shallow maximum around 0.1 Hz (or in terms of wavelength around 60 m).
A MEASUREMENT PROGRAMME HAS BEEN PERFORMED AT THE TAENDPIBE WINDFARM CONCERNING TURBULENCE AND POWER FLUCTUATIONS IN THE WINDFARM, SUPPLEMENTED WITH FREESTREAM MEASUREMENTS FOR REFERENCE.
THE MEASUREMENTS WERE PERFORMED IN TWO PERIODS, SPRING/SUMMER 1988 AND FALL/WINTER 1988. IT WAS THE INTENTION TO GET DATA FROM HIGH WINDSPEED SITUATIONS DURING THE SECOND MEASUREMENTS PERIOD, BUT UNFORTUNATELY OUR ONLY MEANS OF GETTING THE POWER DATA FROM THE TURBINES WAS FROM THE SUPERVISING SYSTEM OF THE PARK, AND THIS SYSTEM SUFFERED A COMPLETE BREAKDOWN IN THE FALL, AND CONSEQUENTLY IT WAS NO LONGER POSSIBLE TO OBTAIN THE NECESSARY POWERDATA. THE SUPERVISING SYSTEM COULD NOT BE REPAIRED WITHIN THE TIMEFRAME WHERE OUR INSTRUMENTATION WAS AVAILABLE AND THEREFORE THE INSTRUMENTATION WAS DISMANTLED JUST BEFORE THE END OF 1988.
THE INSTRUMENTATION COMPRISED OF SONIC ANEMOMETERS FOR FAST RESPONSE MEASUREMENTS OF TURBULENCE TOGETHER WITH FAST RESPONSE CUPS AND VANES.
MORE THAN 120 TIMESERIES FROM SELECTED CONDITIONS HAVE BEEN LOGGED TOGETHER WITH CONTINOUS LOGGING OF MEANS AND VARIANCES. THE ANALYSIS IS TAKING PLACE NOW AND SOME PRELIMINARY RESULTS ARE ALREADY AVAILABLE. THESE RESULTS SHOW VERY MUCH INCREASED TURBULENCE LEVELS INSIDE THE PARK WITH SPECTRAL ENERGY LEVELS INCREASED TO FOUR TIMES THE UPSTREAM LEVEL IN A WIDE FREQUENCY RANGE.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
This project has not yet been classified with EuroSciVoc.
Be the first one to suggest relevant scientific fields and help us improve our classification service
You need to log in or register to use this function
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Data not available
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Data not available
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
6940 Lem
Denmark
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.