Capacity factors at Danish offshore wind farms

Posted by – 2017/10/26

monthlygenHere are the average capacity factors of every Danish offshore wind farm, newly updated to include data to the end of September 2017. The Anholt 1 windfarm, which only opened in 2013, hit an average capacity factor of 47.4% for the full year 2016. Compare these with the capacity factors for German, and UK, and Belgian offshore wind farms.

Danish windfarms also include the most productive wind turbines in the world, at Rønland I: the turbines have been operating for over 14 years now, with a lifetime capacity factor of 44.5%; of its eight turbines, four are rated at 2.3MW peak power, and each of those four had by the end of July 2014 generated over 100 GWh: the first turbines to pass that milestone.

And, for the first time, I’ve had to update the calculations for a new phenomenon: the first decommissioning of a commercial offshore windfarm: Vindeby generated its last electricity in February 2017, after a remarkable 25 years of life.

All numbers are to the end of September 2017. Analysis by EnergyNumbers.info. Raw data from ens.dkLatest
rolling
12-month
capacity
factor
Life
capacity
factor
Age
(y)
Installed
capacity
(MWp)
Total
elec. gen.
(GWh)
Power per
unit area
spanned
(W/m2)
Rolling annual
capacity factors
(click to enlarge)
Quantiles
Total45.5%41.3%127142 0552.6Total
Anholt 153.9%48.4%4.5399.67 6252.2Anholt 1
Avedøre Holme37.6%38.0%7.210.8260Avedøre Holme
Frederikshavn30.7%30.5%14.47.6292Frederikshavn
Horns Rev I41.6%41.8%14.91608 7463.3Horns Rev I
Horns Rev II48.6%47.5%8.1209.37 0473.0Horns Rev II
Middelgrunden27.5%25.4%16.8401 495Middelgrunden
Nissum Bredning028Nissum Bredning (Rønland II)
Nysted (Rødsand) I37.1%37.0%14.3165.67 6742.6Nysted (Rødsand) I
Nysted (Rødsand) II43.1%43.4%7.32075 7412.6Nysted (Rødsand) II
Rønland I48.2%44.4%14.717.2986Rønland I
Samsø38.9%39.0%14.6231 152Samsø
Sprogø31.9%34.1%7.921498Sprogø
Tunø Knob33.2%30.2%22.35296Tunø Knob
Vindeby (closed)22.0%25.54.95244Vindeby

Load duration curves

Here’s for each of the offshore windfarms for which there is detailed hourly data from ENTSOE (from January 2015 to August 2017). Use the pause and play buttons to stop and start the sequential display of curves. Click on the windfarm name in the legend to toggle the display of that farm’s curve.

Calculation method

Just as with the UK offshore windfarm capacity factors, these capacity factors are calculated by calculating, for each turbine in a given wind farm, the number of hours since it was first connected to the grid. This is then multiplied by its capacity, to give the number of peak-MW-hours. These figures are summed across all turbines in a wind farm, and divided into the total energy generated by that wind farm, to give its capacity factor.

Power yield per unit surface area spanned is only calculated for the larger windfarms: when a windfarm is just a single row of turbines, it doesn’t have a well-defined surface area spanned. These yield figures represent 90% of the installed capacity.

Sources

ENS register of Danish wind turbines: thanks to ENS and to Energinet.DK for making the turbine-specific data behind this table available. This post gets updated as new data becomes available.

7 Comments on Capacity factors at Danish offshore wind farms

  1. Now:: Capacity factors at Danish offshore wind farms http://j.mp/hWjeIk #offshorewind

  2. RT @EnergyNumbers: 40%+ capacity factors at Danish offshore wind farms http://j.mp/hWjeIk #offshorewind

  3. […] visar på en betydligt högre utnyttjandegrad än vad man tidigare har antagit. Vindkraftparken Horns Rev 2 hade en kapacitetsfaktor på 52 %, vilket är […]

  4. […] capacity the entire time. See Energy Nos., Capacity Factors at Danish Offshore Wind Farms, http://energynumbers.info/capacity-factors-at-danish-offshore-wind-farms (last visited Nov. 18, 2012). Newer European offshore wind farms can achieve between 44% and 48% […]

  5. […] voor elke individuele Deense windturbine wordt per maand gepubliceerd. Een interessante blog op basis van die gegevens laat zien dat de productiefactor van de nieuwste Deense windparken door […]

  6. […] hier niet of nauwelijks. Om die bewering te staven: er zijn al bestaande windparken in Engeland en Denemarken met een oppervlak in de orde van 100 à 200 vierkante kilometer, waar van de door Miller […]

  7. […] However, it’s hard to separate out variations in wind availability over the years from any operational degradation and technical/operational improvements. Danish offshore load factors from 1980 to 2011 mostly seem to indicate continual improvement: http://energynumbers.info/capacity-factors-at-danish-offshore-wind-farms […]

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