Impact and mitigation of blade surface roughness effects on wind turbine performance

• DOI: 10.1002/we.2691
• Publication Date: 2021-10-29T06:59:59Z
• Authors: Jack Kelly; Christopher Vogel; Richard Willden
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; blade roughness; TJ807-830; 02 engineering and technology; control strategies; wind power; 7. Clean energy; Renewable energy sources

Abstract This paper presents a numerical study of the effects blade roughness on wind turbine performance and annual energy production how these may be partially mitigated through improved control. Three rotors are designed using NACA4415, S801 S810 airfoils, element momentum theory is used to model behaviour. The aerodynamic lift drag data for clean roughened airfoils taken from previous experimental work. These show that surface leads decreased airfoil coefficient an increased across angle attack range typical large turbines, which will clearly lead performance. separate control methods considered turbines with blades operating at each four candidate sites different speed distributions. Results that, compared rotor blades, drop in 2.9–8.6% torque based strategy. A control‐based recovery strategy, controller gain re‐optimised, by 0.1–1.0%.