Analysis and Optimization of Flexible Supported Drive Train in a Wind Turbine

2011 ◽  
Vol 130-134 ◽  
pp. 2861-2865
Author(s):  
Li Ming Zheng ◽  
Hui Xin Li ◽  
Yan Chen
Keyword(s):  
Wind Turbine ◽  
Natural Frequencies ◽  
Structure Design ◽  
Drive Train ◽  
Optimal Parameters ◽  
Planetary Gearbox ◽  
Simulation Results ◽  
Drive Train Model ◽  
Train System ◽  
Elastic Coefficients

Based on conventional drive train model of wind turbines, a planetary gearbox with flexible supporting between gearbox case and nacelle base is considered, and the coupled dynamic model of the drive train system is derived. The gearbox inner vibration performances are evaluated under different flexible parameters by means of dynamic simulation. It is shown that natural frequencies of each shaft are drifting while damping and elastic coefficients changing. Analysis also reveals that the flexible supporting mitigates torsion vibrations of each shaft. To minimizing torsion vibrations, a new searching approach is used to find out optimal parameters of the flexible supporting. Simulation results show that dynamic torque loads of the drive train are reduced, which is useful to wind turbine structure design.

scholarly journals 202 Friction Properties of Friction Disc in Wind Turbine Drive Train System

2014 ◽  
Vol 2014.22 (0) ◽  
pp. 73-74
Author(s):  
Hidetoshi AOKI ◽  
Yasuhiro NAKA ◽  
Kohei TANAKA
Keyword(s):  
Wind Turbine ◽  
Drive Train ◽  
Friction Disc ◽  
Train System ◽  
Turbine Drive

scholarly journals Computational Design Scheme for Wind Turbine Drive-Train Based on Lagrange Multipliers

2017 ◽  
Vol 2017 ◽  
pp. 1-16 ◽  
Author(s):  
Mohammed Saleh ◽  
Ayman Nada ◽  
Ahmed El-Betar ◽  
Ahmed El-Assal
Keyword(s):  
Wind Turbine ◽  
Lagrange Multipliers ◽  
Design Procedure ◽  
Nonholonomic Constraints ◽  
Computational Design ◽  
Evaluation Study ◽  
Drive Train ◽  
Holonomic And Nonholonomic Constraints ◽  
Drive Train Model ◽  
Turbine Drive

The design optimization of wind turbines and their subsystems will make them competitive as an ideal alternative for energy. This paper proposed a design procedure for one of these subsystems, which is the Wind Turbine Drive-Train (WTDT). The design of the WTDT is based on the load assumptions and considered as the most significant parameter for increasing the efficiency of energy generation. In industry, these loads are supplemented by expert assumptions and manipulated to design the transmission elements. In contrary, in this work, the multibody system approach is used to estimate the static as well as dynamic loads based on the Lagrange multipliers. Lagrange multipliers are numerical parameters associated with the holonomic and nonholonomic constraints assigned in the drive-train model. The proposed scheme includes computational manipulations of kinematic constraints, mapping the generalized forces into Cartesian respective, and enactment of velocity-based constrains. Based on the dynamic model and the obtained forces, the design process of a planetary stage of WTDT is implemented with trade-off’s optimization in terms of gearing parameters. A wind turbine of 1.4 megawatts is introduced as an evaluation study of the proposed procedure, in which the main advantage is the systematic nature of designing complex systems in motion.

The Study of Drive-Train System of Wind Turbines with DFIG

2013 ◽  
Vol 347-350 ◽  
pp. 1953-1956
Author(s):  
Zhen Xie ◽  
Gao Fei Lv ◽  
Fei Teng
Keyword(s):  
Stability Analysis ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Drive Train ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Close Relationship ◽  
Synchronous Operation ◽  
Doubly Fed ◽  
Train System

In this paper, we focus on modeling, oscillatory stability analysis of the drive train system and the transient performances of wind turbine with doubly fed induction generator (DFIG) wind turbines, which are evaluated under sub-synchronous operation during the grid voltage fault. Results have shown that the oscillatory stability and shafting parameters have a close relationship, it is necessary to consider the drive train system while the transient performances of DFIG wind turbines are analyzed.

The effect of the rotor adjustment on the vibration behaviour of the drive-train system for a 5 MW direct-drive wind turbine

2017 ◽  
Vol 232 (17) ◽  
pp. 3027-3044 ◽  
Author(s):  
Kan Ye ◽  
Jinchen Ji
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Drive Train ◽  
Direct Drive ◽  
Weight Changes ◽  
Pull Force ◽  
Rotor Position ◽  
Unbalanced Magnetic Pull ◽  
Wide Range ◽  
Train System

Direct-drive wind turbines, different from the standard geared wind turbines, widely use a direct-drive permanent-magnet generator to avoid the gearbox failures. In the absence of a gearbox in the drive-train system, the direct-drive generator operates at low rotating speeds. Thus direct-drive wind turbines require a larger sized generator (higher weight) to transfer the kinetic energy into electrical energy. The inherent unbalanced magnetic pull force of the generator can have impact on the vibration behaviour of the drive-train system. This paper studies the effect of rotor position and weight adjustment on the vibration behaviour of the drive-train system within a 5 MW direct-drive wind turbine by considering the unbalanced magnetic pull force. The adjustment of rotor position and weight changes the location of the centre of gravity of the drive-train system. The drive-train system which consists of the main shaft, rotor, hub and blades is modelled as a four degree-of-freedom nonlinear system. Both rotor displacement and bearing forces are obtained for a wide range of rotor position and weight under different rotating speeds. The obtained results would provide useful information on the optimized rotor position and mass ratio to improve the performance of the drive-train system.

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