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The dynamic response of small wind turbine tower under random wind load is studied, and the influence of the structure parameters, such as the outer diameter and wall thickness of the tower, on the vibration response and the bottom bending strength is studied. The stochastic wind speed is simulated by using the harmonic superposition method with FFT, The random load is calculated by the blade element-...
Modern, large wind turbines require multiobjective, robust controllers in order to fulfill all the control objectives. In the presented work linear matrix inequality (LMI) approach to H∞ control and linear parameter-varying (LPV) theory are utilized to design multivariable, adaptive controller which aims at improving rotational speed control and at reducing tower structural loads. Designed H∞ pitch...
Taking the Xiangjiaba-Shanghai special high-voltage DC??800kV transmission line project being constructed as an example, based on the basic characteristics of fluctuating wind and Kaimal spectra, considering various influences such as structural style of long span transmission tower,characteristics of power spectral energy i.e,the improved weighted amplitude wave superposition (WAWS) method adopting...
The dynamic characteristics of wind turbine generator tower are studied using the aerodynamics and structural dynamics theories, the mathematical model and the structure model of the tower are established. The numerical simulation method is used to simulate the turbulence flow of the wind, the turbulence model is customed in ANSYS. The 32 bands frequency and vibration mode are analyzed and the wind...
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