| Author(s) | Ervin Bossanyi, Renzo Ruisi, Gunner Chr. Larsen and Mads Mølgaard Pedersen |
| Journal | Journal of Physics: Conference Series |
| Year | 2022 |
| DOI / Link | https://iopscience.iop.org/article/10.1088/1742-6596/2265/4/042032 |
| Keywords | Wind farm flow control; Induction control; Field testing |
Lillgrund offshore wind farm near Copenhagen has been the subject of a number of
research projects. The close turbine spacing makes it an interesting candidate for research into
turbine wakes and wind farm control. As part of the EU TotalControl project, an axial
induction controller has been designed for field testing at Lillgrund. The controller was
designed using steady-state optimisations in DNV’s LongSim code, which predicted a small but
significant power gain along with a considerable reduction in fatigue loading. Some
simplifications were introduced for ease of practical implementation on this particular site; the
controller was initially optimised to improve the power output of one 7-turbine row, with the
aim of extending to the whole wind farm if the first test was successful. The expected power
gain was confirmed by running realistic, detailed time-domain simulations in LongSim, and
independently corroborated using steady-state calculations with DTU’s linear CFD code Fuga.
The controller was implemented on site, and a toggle test was initiated on site in late December
2021, with the wind farm controller toggling between controlled and default states every 50
minutes. First results are expected early in 2022.