scholarly journals A METHOD FOR INCREASING THE EFFICIENCY OF A WIND TURBINE

2020 ◽  
Vol 17 (2) ◽  
pp. 73-77
Author(s):  
A.K. Yershina ◽  
Keyword(s):  
Wind Turbine ◽  
Alternative Energy ◽  
Wind Power Plant ◽  
Wind Flow ◽  
High Wind ◽  
High Wind Speed ◽  
Current State ◽  
Unique Method ◽  
First Time ◽  
Turbine Construction

The article discusses the possibilities of improving the energy efficiency of wind turbines. A brief analysis of the current state of development of alternative energy, in particular wind energy in Kazakhstan, is considered. It is shown that an increase in the power of a wind - power plant is possible due to the use of a system of simultaneously rotating rotors. A brief description of the Bidarier-2 wind turbine construction, which can significantly increase the power removed from the wind flow, is given. The possibility of further increasing the efficiency of the Bidarrieus-2 wind turbine by means of a concentrator is discussed. The unique method for the speed controlling of the wind flow with the help of sliding flaps of the guide concentrator in order to improve the performance of the wind turbine at high wind speed is proposed first time.

scholarly journals Control of a Small Wind Turbine in the High Wind Speed Region

2016 ◽  
Vol 31 (10) ◽  
pp. 6980-6991 ◽  
Author(s):  
Carlos Lumbreras ◽  
Juan Manuel Guerrero ◽  
Pablo Garcia ◽  
Fernando Briz ◽  
David Daz Reigosa
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
High Wind ◽  
High Wind Speed ◽  
Small Wind Turbine

Dynamic Instability of Spatial Structures under Typical Wind Flow

2011 ◽  
Vol 295-297 ◽  
pp. 1738-1741
Author(s):  
You Qin Huang ◽  
Ji Yang Fu
Keyword(s):  
Wind Speed ◽  
Wind Tunnel ◽  
Double Layer ◽  
Dynamic Instability ◽  
Wind Flow ◽  
Spatial Structures ◽  
High Wind ◽  
High Wind Speed ◽  
Large Span ◽  
Wind Flows

The mechanism of dynamic instability of large span spatial structures under high wind speed should be studied carefully, but it has seldom been done before. In this paper, a double-layer cylindrical reticulated shell under a typical wind flow is taken as an example to study the dynamic instability of large span spatial structures under wind flows. The interaction of the shell and the flow is ignored and unsteady wind forces on the shell are obtained from wind tunnel tests. The dynamic instability status of the shell is determined by the Budiansky-Roth criterion. The results show that the double-layer cylindrical reticulated shell will become dynamically instable under high wind speed.

scholarly journals Analisis Regresi Kecepatan Angin Terhadap Daya Turbin Angin Jenis VAWT Tipe Darrieus-Savonius

2018 ◽  
Vol 1 (02) ◽  
pp. 15-20
Author(s):  
Luthfi - Hakim ◽  
Achmad Rijano ◽  
Mochamad Muzaki
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Maximum Power ◽  
High Wind ◽  
High Wind Speed ◽  
Low Wind Speed ◽  
Turbine Performance

 The Darrieus-Savonius (DS) wind turbine has been widely developed with the aim of improving turbine performance that has been designed. DS wind turbine is a combination of two type of wind turbines, that is Darrieus and Savonius turbine, both turbines are intentionally developed In order to get self-starting on turbine Savonius with low wind speed and able to extract the speed of engine into energy well at high wind speed through Cherrie Darrieus. This study was conducted to analyze the performance of the DS turbine in the wind speed to be energized through the turbine rotation and power to be generated. The DS wind turbine is designed to start rotating at a speed of 8 m/s in velocity of wind, meanwhile the maximum power generated by turbine is 48,23 Watts. 

scholarly journals Control of a small wind turbine in the high wind speed region

2014 ◽  
Author(s):  
Carlos Lumbreras ◽  
Juan M. Guerrero ◽  
Pablo Garcia ◽  
Fernando Briz ◽  
David Diaz
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
High Wind ◽  
High Wind Speed ◽  
Small Wind Turbine

About the Extension of Wind Turbine Power Curve in the High Wind Region

2018 ◽  
Vol 141 (1) ◽  
Author(s):  
Davide Astolfi ◽  
Francesco Castellani ◽  
Andrea Lombardi ◽  
Ludovico Terzi
Keyword(s):  
Wind Speed ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Wind Farm ◽  
Wind Farms ◽  
Test Case ◽  
Power Curve ◽  
High Wind ◽  
High Wind Speed ◽  
Wind Speeds

The financial sustainability and the profitability of wind farms strongly depend on the efficiency of the conversion of wind kinetic energy. This motivates further research about the improvement of wind turbine power curve. If the site is characterized by a considerable occurrence of very high wind speeds, it can become particularly profitable to update the power curve management. This is commonly done by raising the cut-out velocity and the high wind speed cut-in regulating the hysteresis logic. Doing this, on one side, the wind turbine possibly undergoes strong vibration and loads. On the other side, the energy improvement is almost certain and the point is quantifying precisely its magnitude. In this work, the test case of an onshore wind farm in Italy is studied, featuring 17 2.3 MW wind turbines. Through the analysis of supervisory control and data acquisition (SCADA) data, the energy improvement from the extension of the power curve in the high wind speed region is simulated and measured. This could be useful for wind farm owners evaluating the realistic profitability of the installation of the power curve upgrade on their wind turbines. Furthermore, the present work is useful for the analysis of wind turbine behavior under extremely stressing load conditions.

scholarly journals ПОВЫШЕНИЕ ЭФФЕКТИВНОСТИ ВЕТРОЭНЕРГЕТИЧЕСКОЙ УСТАНОВКИ С ВЕРТИКАЛЬНОЙ ОСЬЮ ВРАЩЕНИЯ

2018 ◽  
pp. 77-86
Author(s):  
Анатолий Максимович Суббота ◽  
Виталий Георгиевич Джулгаков
Keyword(s):  
Control System ◽  
Power Plant ◽  
Wind Turbine ◽  
Wind Power ◽  
Wind Direction ◽  
Fuzzy Controller ◽  
Angular Position ◽  
Maximum Efficiency ◽  
Wind Power Plant ◽  
Wind Flow

The questions connected with increase of efficiency of functioning of a wind power plant with a vertical axis of rotation are considered.Such plants convert the energy of the wind flow into rotational energy of the generator shaft, pump or other actuators. An overview of the design options for wind turbines of this type is presented. For vertically-axial wind power plants, in comparison with horizontally-propeller ones, it is possible to increase their efficiency by providing insensitivity to wind direction change. This is possible provided that the angular position of the blades with respect to the wind flow is continuously and purposefully changed as the wind turbine rotates. The principle of increasing the efficiency of the wind power plant is proposed due to the synchronous control of the position of the blades, depending on the direction and speed of the wind flow. The implementation of this principle is considered in detail for a four-bladed wind turbine. Depending on the direction and magnitude of the wind flow, as well as the angular velocity of rotation of the turbine, the value of the angle of the initial installation of the blades was analytically obtained, which ensures the maximum efficiency of using the wind plant. The functional scheme of the control system of the orientation of the four blades is formed. This system uses information about the current power of the generator, the rotation speed of the wind turbine, the direction and speed of the wind flow, obtained from the respective sensors. A detailed functional diagram of one channel of the control system has been constructed taking into account the initial exposure of the blade, which additionally uses information about the current angular position of the blade and the speed of its turn. Each such channel contains a proportional-differential controller or fuzzy logic controller. The proposed fuzzy controller has two inputs of linguistic variables - the angle of rotation of the blade and the speed of its rotation. As a kind of membership functions, a triangular distribution is chosen. A system of rules for adjusting the fuzzy controller has been developed. The computer simulation of the channel functioning of the control system with two types of regulators for the mode of initial setting of the blades with a change in wind direction was performed. Comparison of the quality of the control system with a proportional-differential and fuzzy controller is performed

BEHAVIOR OF MECHANICALLY ANCHORED WATERPROOFING MEMBRANE EXPOSED IN HIGH WIND SPEED OF ACTUAL WIND

2006 ◽  
Vol 71 (610) ◽  
pp. 29-34 ◽  
Author(s):  
Hiroyuki MIYAUCHI ◽  
Nobuo KATO ◽  
Hirokazu ICHIKAWA ◽  
Takanori SASAKI ◽  
Kyoji TANAKA
Keyword(s):  
Wind Speed ◽  
High Wind ◽  
High Wind Speed ◽  
Waterproofing Membrane
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