The paper presents comparisons of four control strategies to mitigate the effects of roughness on wind turbine performance. To calculate energy production, an in-house BEM solver is fed with experimental airfoil data.

The paper is well written but I cannot find any novelty on it.

1-The experimental data used is old (1996) and has been widely studied in the literature (no novelty here) .

2-The BEM methodology described in the paper is 'classic' and is used by wind turbine manufacturer on daily basis (no novelty here) . In fact, a classic and similar study was performed in 1995!
-Development and Application of a Multipoint Inverse Design Method for Horizontal Axis Wind Turbines Michael S. Selig" and James L. Tangle . Wind engineering, vol 19-2 1995
or more recently:
-Effect of Surface Roughness on Wind Turbine Performance, SANDIA REPORT SAND2017-10669, 2017

3-The proposed control strategies are not state of the art (no novelty here). The authors should consider more realistic strategies, see for example: E. José Novaes Menezes, A. Maurício Araújo, N. Sophie Bouchonneau da Silva, A review on wind turbine control and its associated methods, Journal of Cleaner Production, Vol 174, 2018.

All in all, it is not clear what is the aim and novelty of this paper, and the introduction does not include a complete state of the art that highlights the scope and novelty of the study.
For these reasons, I cannot recommend this paper for publication in Wind Energy.

The paper has been improved and can now be accepted for publication in Wind Energy.