Structural Control of a Wind Turbine Accounting for Second Order Effects

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Caterino, Nicola^1,2 ; Spizzuoco, Mariacristina^3

Department of Engineering, University of Napoli Parthenope, Centro Direzionale, isola C4, Naples

80123, Italy^1

Construction Technologies Institute, National Research Council (CNR), San Giuliano Milanese, Milan, Italy^2

Department of Structures for Engineering and Architecture, University of Napoli Federico II, Via Claudio 21, Naples

80125, Italy^3

关键词: Elastic springs;    Extreme loads;    Frequency contents;    Instantaneous response;    Long lasting;    Magneto-rheological dampers;    Second order effect;    Structural control;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/2/022040/pdf
DOI  :  10.1088/1757-899X/245/2/022040

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The negative impact of the use of fossil fuels on the environment has lead to a boom in the production of wind turbines. The progressively increasing turbines' height, decided to take ad-vantage of the smoother winds at higher altitude, has led to an increased demand to control tower forces. The proposed work is focused on the application of a semi-active (SA) control system to limit bending moment demand at the base of a wind turbine by relaxing the base restraint of the turbine's tower, without increasing the top displacement. The proposed SA control system reproduces a variable restraint at the base that changes in real time its mechanical properties according to the instantaneous response of the turbine's tower. This smart restraint is made of a central smooth hinge, elastic springs and SA magnetorheological dampers driven by a properly designed control algorithm. A commercial 105 m tall wind turbine has been considered as a case study. Several numerical simulations have been performed with reference to two extreme loads, different one each other for intensity, duration, frequency content, so as to understand if a unique optimal configuration of the controller can be defined for both of them. The proposed study is also focused on understanding whether and how to reduce the residual top displacement due to the possible incremental base rotation that may happen during a wind load history, especially when it is long lasting.