Edgewise vibration reduction of small size wind turbine blades using shunt damping

Abstract

Edgewise vibration in wind turbine blades is one of the important factors that results in reducing the performance of wind turbines. Therefore, control or reduction of the mentioned vibrations can be of great help in increasing the efficiency of wind turbines. In this paper, the shunt damping method is proposed to reduce the edgewise blade vibration of horizontal axis wind turbines. For this purpose, partial differential equations governing dynamics of the system are derived using the Lagrange method. These equations are completely nonlinear and linearization is not performed to avoid possible errors in the analysis. In order to evaluate the effectiveness of the proposed shunt damping method in vibration reduction of the wind turbine blade, obtained results by applying shunt damping method are compared with corresponding results obtained by employing a conventional method known as a tuned mass damper (TMD). For better comparison, by considering proper cost functions, the shunt damper and TMD parameters are optimized using a genetic algorithm. Finally, the effectiveness of optimized shunt damper in vibration reduction of the blade is compared with optimized TMD by presenting simulation results.

Passive Shunted Piezoelectric Systems for Vibration Control of Wind Turbine Towers: A Feasibility Study

“…For relatively flexible, small structures and devices, shunted vibration absorbers have been tested [16][17][18][19]. They have also been used in various industrial applications, including [20,21], for the vibration suppression of wind turbine blades. Shunted piezoelectrics have been proposed for damping and control of relatively energy-demanding applications like [22][23][24][25][26].…”

Active Edgewise Blade Damping Control of Large Wind Turbines by Using the Pitch Controller and an Interval Observer

“…More common is the use of dampers for edgewise vibrations (see, e.g., [5] for active systems, [16,17] for passive systems, and [18] for semi-active systems. In addition, a shunt damping approach is presented in [19] (see [20] for a review on shunt damping vibration control).…”

Pole‐Placement‐Based Calibration of an Electromagnetically Realizable Inerter‐Based Vibration Absorber (IDVA) for Rotating Wind Turbine Blades

“…Hence, they predominantly tune the fapwise blade loads, while hardly affecting the lightly damped edgewise vibration, and may have a negative infuence on the power output [13]. To the end, diferent structural control devices are designed to efectively increase the damping in the edgewise mode such as the roller damper [16], the tuned liquid damper (TLD) [17,18], the circular liquid column damper (CLCD) [19], the tuned liquid column damper (TLCD) [20,21], magnetorheological (MR) dampers [22], and shunt dampers [23,24]. Teir performance of edgewise vibration mitigation had been demonstrated numerically or experimentally.…”

“…Chen et al [22] introduced MR dampers to dissipate energy inside the wind turbine blade to reduce the edgewise vibration under extreme wind loads where semiactive fuzzy control is used to produce the desired force. Biglari and Fakhari [23] proposed a passive shunt damper to reduce the edgewise vibration of the wind turbine blades, and a genetic algorithm was used for damper design. Te result demonstrated the improved efectiveness of the proposed damper compared with the conventional TMD.…”