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Lu X.,Zhejiang University | Lu X.,Jinan Railway Vehicles Equipment Co. | Li W.,Zhejiang University | Lin Y.,Zhejiang University
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2012

The yaw and individual pitch control of floating offshore wind turbines was presented. The hydrodynamics and kinematics of the floating platform were presented, and the platform model was built. The control strategy of onshore wind turbine was taken as reference. The pitch angle, yaw and power were taken as control objects. Expert PID controllers were designed to overcome the nonlinearity, and d-q axis transformation was used to translate the control signals to the three blades. To verify the controller, the simulation based on FAST has been carried out. The results showed that the individual controller can effectively reduce the pitch angle of the platform with little influence to the power. Source


Guo H.C.,Hunan Institute of Science and Technology | Dai L.P.,Jinan Railway Vehicles Equipment Co. | Ding C.Y.,Hunan Institute of Science and Technology
Applied Mechanics and Materials | Year: 2013

The reactions, equations of moment and the overall moment of two planes were deduced based on mechanics of materials, as the main shaft was assumed to be a homogeneous three-section beam. Based on the fourth strength theory, equivalent stresses of three cross sections were solved. Based on the deduced conclusion, the equivalent stress of a various ultimate load cases were solved automatically by entering the loads of the hub center in the Excel, which was applied to the design and optimize for the main shaft. © (2013) Trans Tech Publications, Switzerland. Source


Guo H.C.,Hunan Institute of Science and Technology | Dai L.P.,Jinan Railway Vehicles Equipment Co. | Ding C.Y.,Hunan Institute of Science and Technology
Applied Mechanics and Materials | Year: 2013

The reliability model and test method of wind turbine is described in the paper. According to the characteristics of wind turbine product, a truncate sequential compliance method for reliability test is designed, and it is given an example for 1MW wind turbine. The example shows accumulating more before-test experience and decreasing the experiment time appropriately won't result in the reduction of the reliability. © (2013) Trans Tech Publications, Switzerland. Source


Ding C.,Hunan Institute of Science and Technology | Dai L.,Jinan Railway Vehicles Equipment Co. | Guo H.,Hunan Institute of Science and Technology
Applied Mechanics and Materials | Year: 2012

ANSYS12.1 software is applied to the generator frame modeling and the static and dynamics performance analysis of the frame. The frame is calculated to find the max stress and the first six frequency, and based on the results, some suggestions is put forward for the optimization design. © (2012) Trans Tech Publications, Switzerland. Source


Ding C.,Hunan Institute of Science and Technology | Li G.,Jinan Railway Vehicles Equipment Co. | Guo H.,Hunan Institute of Science and Technology
Applied Mechanics and Materials | Year: 2012

This article combines with finite element method and the rain flow count method, which is using the nominal stress method developed a wind turbine used for structural fatigue analysis method, with 2.0 MW wind and machine hub to analyze the fatigue, calculated the operation lifespan fatigue load of wind turbine in the 20 years. By choosing the hot point of hub, analyzes the wheels fatigue damage characteristics. The calculation results show that: the selection of hot point wheels meet with the requirements of GL standard Fatigue design. This paper can be used in large wind turbine development design and in the process of production design authentication. © (2012) Trans Tech Publications, Switzerland. Source

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