Second order sliding mode controllers for a newly developed twin wind turbines: design and comparisons

Guenoune, Ibrahim; Bonofiglio, P.; Plestan, Franck; Kari, Mohammed Zakaria; Mechernene, Abdelkader

doi:10.1109/icaee47123.2019.9014780

Cited by 1 publication

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is verified by comparing natural frequencies from a high‐fidelity linear numerical model of a tri‐rotor wind turbine with a nonlinear model 32 and validated by full‐scale testing 33 and down‐scaled experiments 34 . New strategies are yet to be developed for load reduction and proper control of the rotor speeds of MRWTs 35–37 …”

Section: Introductionmentioning

confidence: 80%

An intuitive representation and analysis of multi‐rotor wind turbine whirling modes

Filsoof

Zhang

2021

Wind Energy

View full text Add to dashboard Cite

A multi‐rotor wind turbine (MRWT) is a concept that can reduce the size of the rotor blades compared to a single‐rotor wind turbine (SRWT). Making a cost‐optimized MRWT requires a detailed understanding of its stability properties. This paper aims to establish a physical and intuitive representation of whirling modes for three‐bladed isotropic SRWT and MRWT. An aeroelastic simulation of a nonlinear SRWT model is presented to empathize the importance of whirling. The whirling concept is introduced by simplifying the complexity of the wind turbine rotor into two models. From the models, edgewise and flapwise whirling modes are analyzed. An analytical model of a two‐rotor wind turbine is examined to present the edgewise whirling modes of MRWT. The flapwise whirling modes for MRWT are introduced by using results from edgewise whirling and findings from previous research. The MRWT whirling analysis shows whirling from multiple rotors creates reaction forces to the supporting structure when the rotors have the same speed. This results in whirling coupling modes at the same natural frequency. One is a rotor symmetric whirling mode where the rotors whirling are in phase and a rotor asymmetric mode where whirling of the rotors are out of phase. The whirling coupling effects are minimized in the case that the rotors have different speeds.

show abstract

Section: Introductionmentioning

confidence: 80%