Loading system and control strategy for simulating wind turbine loads

2015 ◽  
Vol 23 (11) ◽  
pp. 1739-1752 ◽  
Author(s):  
Xiu-xing Yin ◽  
Yong-gang Lin ◽  
Wei Li ◽  
Hang-ye Ye
Keyword(s):  
Wind Turbine ◽  
Control Strategy ◽  
Reference Frames ◽  
System Modeling ◽  
Axial Loading ◽  
Degree Of Freedom ◽  
Rotating Disc ◽  
Modeling And Analysis ◽  
Loading System ◽  
And Control

A novel loading control system is proposed to accurately simulate the five-degree-of-freedom loads experienced by a real wind turbine. For this system, the real wind rotor and blades are replaced by an equivalent rotating disc and driven by an electric motor. A set of loading actuators are uniformly placed around this disc and are regulated to accurately create these turbine loads. In this paper, the five-degree-of-freedom turbine loads are defined in blade and hub reference frames. A load-decomposition based loading control strategy is presented to decompose such loads into reference loading forces for each actuator. An axial loading actuator is used for system modeling and analysis. Experimental results have validated that the proposed loading system and control strategy can accurately simulate the representative turbine loads with a good confidence level.

Study on a global control strategy for rotation speed with different work states in variable-speed constant-frequency wind turbines

2011 ◽  
Vol 225 (7) ◽  
pp. 968-976 ◽  
Author(s):  
G Zheng ◽  
H Xu ◽  
X Wang ◽  
J Zou
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Control Strategy ◽  
Control Strategies ◽  
Stable Operation ◽  
Constant Frequency ◽  
Global Control ◽  
Control Rules ◽  
The Individual ◽  
And Control

This paper studies the operation of wind turbines in terms of three phases: start-up phase, power-generation phase, and shutdown phase. Relationships between the operational phase and control rules for the speed of rotation are derived for each of these phases. Taking into account the characteristics of the control strategies in the different operational phases, a global control strategy is designed to ensure the stable operation of the wind turbine in all phases. The results of simulations are presented that indicate that the proposed algorithm can control the individual phases when considered in isolation and also when they are considered in combination. Thus, a global control strategy for a wind turbine that is based on a single algorithm is presented which could have significant implications on the control and use of wind turbines.

Optimal Control of Distributed Generation System: The State of the Art

2013 ◽  
Vol 433-435 ◽  
pp. 1061-1064
Author(s):  
Hai Liu ◽  
Qing Fu Du ◽  
Yong Song ◽  
Wei Guo
Keyword(s):  
Optimal Control ◽  
Distributed Generation ◽  
Control Strategy ◽  
State Of The Art ◽  
The State ◽  
Generation System ◽  
Modeling And Analysis ◽  
Optimal Dispatch ◽  
Research Orientations ◽  
And Control

This paper presents a detailed review of the existing methods of the optimal control of distributed generation system and the state of the art of current research. The research of the optimal control of distributed generation system is summarized in terms optimal dispatch and control strategy. The approach of modeling and analysis for distributed generation system is described in detail. The key difficulties of the theory and technique about the optimal control of distributed generation system are analyzed. The current issues about the optimal control of the system are pointed out at last, and the research orientations of the optimal control of distributed generation system are presented.

Improved Control Strategy of Wind Turbine with DFIG for Low Voltage Ride through Capability

2014 ◽  
Vol 707 ◽  
pp. 329-332
Author(s):  
Li Ling Sun ◽  
Dan Fang
Keyword(s):  
Wind Turbine ◽  
Control Strategy ◽  
Low Voltage ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Operating Characteristics ◽  
Low Voltage Ride Through ◽  
Doubly Fed ◽  
Rotor Side Converter ◽  
And Control

As the number of doubly fed induction generator (DFIG)- based wind-turbine systems continues to increase, wind turbines are required to provide Low Voltage Ride-Through (LVRT) capability, especially under the condition of grid voltage dips. This paper, depending on the operating characteristics of doubly-fed induction generator during grid faults ,deals with a protection and control strategy on rotor-side converter (RSC) to enhance the low voltage ride through capability of a wind turbine driven doubly fed induction generator (DFIG). The simulation and experiment studies demonstrate the correctness of the developed model and the effectiveness of the control strategy for DFIG-based wind-turbine systems under such adverse grid conditions.

A Complete Modeling and Control for Wind Turbine Based of a Doubly Fed Induction Generator using Direct Power Control

2017 ◽  
Vol 8 (4) ◽  
pp. 1954 ◽  
Author(s):  
Fawzi Senani
Keyword(s):  
Power Control ◽  
Wind Turbine ◽  
Control Strategy ◽  
Reactive Power ◽  
Maximum Efficiency ◽  
Direct Power ◽  
Direct Power Control ◽  
Modeling And Control ◽  
Doubly Fed ◽  
And Control

<span lang="EN-US">The paper presents the complete modeling and control strategy of variable speed wind turbine system (WTS) driven doubly fed induction generators (DFIG). A back-to-back converter is employed for the power conversion exchanged between DFIG and grid. The wind turbine is operated at the maximum power point tracking (MPPT) mode its maximum efficiency. Direct power control (DPC) based on selecting of the appropriate rotor voltage vectors and the errors of the active and reactive power, the control strategy of rotor side converter combines the technique of MPPT and direct power control. In the control system of the grid side converter the direct power control has been used to maintain a constant DC-Link voltage, and the reactive power is set to 0. Simulations results using MATLAB/SIMULINK are presented and discussed on a 1.5MW DFIG wind generation system demonstrate the effectiveness of the proposed control.</span>

Research on Nonlinear Modeling and Simulation for Flexible Drive Train of Wind Turbine

2012 ◽  
Vol 424-425 ◽  
pp. 1041-1043
Author(s):  
Wen Hui Zhao ◽  
Zhen Yun Duan ◽  
She Liu
Keyword(s):  
Wind Turbine ◽  
Nonlinear Modeling ◽  
Uncertain System ◽  
Drive Train ◽  
Social Benefits ◽  
Modeling And Analysis ◽  
Construction Period ◽  
Modeling Methods ◽  
And Control ◽  
Nonlinear Uncertain System

Wind energy has preferable economic and social benefits because of its cleanliness and free pollution, short construction period, and so on. The wind turbine is a complicated nonlinear uncertain system. So the modeling and analysis of system is crucial to the system design of wind turbines. Drive train performance of wind turbine was analyzed, and modeling methods were presented according to rigid drive train and flexible drive train. Based on those models, software has been designed to show the performance of the wind turbine, and then contrast with the result that simulated by GH Bladed software, to verify the accuracy of the models. The results show that the models can be used in optimum design and control strategy.

System Modeling and Analysis of Wind Turbine Blade Grinding Robot

2011 ◽  
Vol 80-81 ◽  
pp. 889-893 ◽  
Author(s):  
Chi Wu Bu ◽  
Li Xun Zhang
Keyword(s):  
Wind Turbine ◽  
Dynamic Model ◽  
Turbine Blade ◽  
System Modeling ◽  
Wind Turbine Blade ◽  
Mobile Manipulator ◽  
Grinding Wheel ◽  
Simulation Research ◽  
Modeling And Analysis ◽  
Coupling Force

A mobile grinding robot is present here for the wind turbine blade grinding work. The robot is a mobile manipulator equipped with a grinding wheel. A mobile manipulator robot is built up with a mobile platform and a robotic arm mounted on it. The dynamic model of the robot is built, and the dynamic model of the two subsystems is derived from it, so the dynamic coupling items can be deduced. In order to discover how the coupling force influence the robotic manipulator, the SimMechanics model of the robot is built up and the simulation research is carried out by the built model. The results show the influence of coupling force on the manipulator.

Nonlinear vibrations of suspended cables—Part I: Modeling and analysis

2004 ◽  
Vol 57 (6) ◽  
pp. 443-478 ◽  
Author(s):  
Giuseppe Rega
Keyword(s):  
System Modeling ◽  
Global Bifurcation ◽  
Finite Amplitude ◽  
Review Article ◽  
Degree Of Freedom ◽  
Approximate Methods ◽  
Modeling And Analysis ◽  
Asymptotic Models ◽  
Numerical Tools ◽  
Suspended Cables

This review article is the first of three parts of a Special Issue dealing with finite-amplitude oscillations of elastic suspended cables. This part is concerned with system modeling and methods of analysis. After shortly reporting on cable historical literature and identifying the topic and scope of the review, the article begins with a presentation of the mechanical system and of the ensuing mathematical models. Continuum equations of cable finite motion are formulated, their linearized version is reported, and nonlinear discretized models for the analysis of 2D or 3D vibration problems are discussed. Approximate methods for asymptotic analysis of either single or multi-degree-of-freedom models of small-sag cables are addressed, as well as asymptotic models operating directly on the original partial differential equations. Numerical tools and geometrical techniques from dynamical systems theory are illustrated with reference to the single-degree-of-freedom model of cable, reporting on measures for diagnosis of nonlinear and chaotic response, as well as on techniques for local and global bifurcation analysis. The paper ends with a discussion on the main features and problems encountered in nonlinear experimental analysis of vibrating suspended cables. This review article cites 226 references.

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