A Suitable Load Control Method for Constant Tip Speed Ratio Operation of Stand-alone Wind Turbine-Generator Systems (Part 1: Evaluation of Power Generation Capability and Output Fluctuation)

2007 ◽  
Vol 31 (1) ◽  
pp. 43-58 ◽  
Author(s):  
Tetsuya Wakui ◽  
Ryohei Yokoyama
Keyword(s):  
Power Generation ◽  
Wind Turbine ◽  
Control Method ◽  
Load Control ◽  
Speed Ratio ◽  
Turbine Generator ◽  
Wind Turbine Generator ◽  
Tip Speed Ratio

scholarly journals A novel optimum tip speed ratio control of low speed wind turbine generator based on type-2 fuzzy system

2019 ◽  
Vol 8 (4) ◽  
Author(s):  
Muldi Yuhendri ◽  
Mukhlidi Muskhir ◽  
Taali Taali
Keyword(s):  
Control System ◽  
Wind Turbine ◽  
Output Power ◽  
Fuzzy System ◽  
Speed Ratio ◽  
Turbine Generator ◽  
Wind Turbine Generator ◽  
Tip Speed Ratio ◽  
Speed Controller

Variable speed control of wind turbine generator systems have been developed to get maximum output power at every wind speed variation, also called Maximum Power Points Tracking (MPPT). Generally, MPPT control system consists of MPPT algorithm to track the controller reference and generator speed controller. In this paper, MPPT control system is proposed for low speed wind turbine generator systems (WTGs) with MPPT algorithms based on optimum tip speed ratio (TSR) and generator speed controller based on field oriented control using type-2 fuzzy system (T2FS). The WTGs are designed using horizontal axis wind turbines to drive permanent magnet synchronous generators (PMSG). The simulation show that the MPPT system based optimum TSR has been able to control the generator output power around the maximum point at all wind speeds.

scholarly journals Comparisons between the Wake of a Wind Turbine Generator Operated at Optimal Tip Speed Ratio and the Wake of a Stationary Disk

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Takanori Uchida ◽  
Yuji Ohya ◽  
Kenichiro Sugitani
Keyword(s):  
Numerical Simulations ◽  
Wind Turbine ◽  
Speed Ratio ◽  
Turbine Generator ◽  
Velocity Deficit ◽  
Wind Turbine Generator ◽  
Tip Speed Ratio ◽  
Stationary Disk ◽  
Eddy Simulation ◽  
Les Model

The wake of a wind turbine generator (WTG) operated at the optimal tip speed ratio is compared to the wake of a WTG with its rotor replaced by a stationary disk. Numerical simulations are conducted with a large eddy simulation (LES) model using a nonuniform staggered Cartesian grid. The results from the numerical simulations are compared to those from wind-tunnel experiments. The characteristics of the wake of the stationary disk are significantly different from those of the WTG. The velocity deficit at a downstream distance of (: rotor diameter) behind the WTG is approximately 30 to 40% of the inflow velocity. In contrast, flow separation is observed immediately behind the stationary disk (), and the velocity deficit in the far wake () of the stationary disk is smaller than that of the WTG.

scholarly journals A New Pitch Angle Control Method of Wind Turbine Generators Based on Feedforward Wind Speed Information

2019 ◽  
Vol 122 ◽  
pp. 04001
Author(s):  
Mouayad Sahib ◽  
Thaker Nayl
Keyword(s):  
Power Generation ◽  
Wind Speed ◽  
Wind Turbine ◽  
Pitch Angle ◽  
Control Method ◽  
Turbine Generator ◽  
Wind Turbine Generator ◽  
Intelligent Control System ◽  
Turbine Generators ◽  
New Strategy

In this work, a new strategy to control the pitch angle of wind turbine generator is proposed. The strategy is based on designing an intelligent control system capable of maintaining a stable minimum fluctuating power generation. This can be achieved by providing the wind speed information to the controller in advance and hence allowing the controller to take the optimum action in controlling the blade pitch angle. A model based optimizer uses Model Predictive Control (MPC) technique to predict the wind turbine generator future behaviour and select the optimal control actions assisted by the wind speed information while satisfying the power generation constraints. The simulation results show that a significant improvement can be made using the proposed control method.

A Suitable Load Control Method for Constant Tip Speed Ratio Operation of Stand-Alone Wind Turbine-Generator Systems

2008 ◽  
Vol 32 (2) ◽  
pp. 143-161 ◽  
Author(s):  
Tetsuya Wakui ◽  
Ryohei Yokoyama
Keyword(s):  
Measurement Error ◽  
Wind Speed ◽  
Wind Turbine ◽  
Rotational Speed ◽  
Control Method ◽  
Vertical Axis ◽  
Load Control ◽  
Speed Ratio ◽  
Vertical Axis Wind Turbine ◽  
Tip Speed Ratio

A suitable load control method for constant tip speed ratio operation of a stand-alone system using a vertical axis wind turbine with self-starting capability is discussed. The system with a straight-wing-type turbine is mainly operated at a constant tip speed ratio. Two types of load control methods are considered: Method-1, where the load torque is controlled in proportion to the square of the rotational speed, and Method-2, which adopts feedback control of the rotational speed in response to the measured wind speed. In this second report on a suitable load control method, the influence of the measurement error of the inflow wind speed is particularly focused on. The computational results obtained using the dynamic simulation model show that Method-1, which is not affected by the measurement error and has a fine smoothing effect of the output fluctuation, is the more suitable load control method.

scholarly journals A Reliability Based Model for Wind Turbine Selection

2013 ◽  
Vol 2 (2) ◽  
pp. 69-74 ◽  
Author(s):  
A.K. Rajeevan ◽  
P.V. Shouri ◽  
Usha Nair
Keyword(s):  
Power Generation ◽  
Wind Speed ◽  
Wind Turbine ◽  
Wind Power ◽  
Point Of View ◽  
Cube Root ◽  
Mathematical Relationship ◽  
Turbine Generator ◽  
Wind Turbine Generator ◽  
A Site

A wind turbine generator output at a specific site depends on many factors, particularly cut- in, rated and cut-out wind speed parameters. Hence power output varies from turbine to turbine. The objective of this paper is to develop a mathematical relationship between reliability and wind power generation. The analytical computation of monthly wind power is obtained from weibull statistical model using cubic mean cube root of wind speed. Reliability calculation is based on failure probability analysis. There are many different types of wind turbinescommercially available in the market. From reliability point of view, to get optimum reliability in power generation, it is desirable to select a wind turbine generator which is best suited for a site. The mathematical relationship developed in this paper can be used for site-matching turbine selection in reliability point of view.

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