The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
There were conceived original methods that intend to optimize (maximize) the efficiency of variable speed fixed blade wind generators. These methods are based on mathematical models of fixed blades wind turbines windmills. This is the main reason that an important part of the paper is dedicated to the problematic of mathematical modeling of the wind turbine - focused mainly on the determination from...
Responding to more demand in coming years, the task of the small wind energy industry requires progress on several fronts-from public policy initiatives, to technology development, to market growth. Enhanced technologies such as contra-rotating blades, transmission systems, lubrication, airfoils, generators, and power electronics will lower cost and increase energy production. This paper mainly considers...
Wind power generation is becoming increasingly common in the portfolio mix of many utilities around the world. Wind turbines are presently available up to 5MW. Smaller turbines may be installed for individual customers and connected to the grid at the distribution level, and larger units are typically combined in a wind “farms” connected to bulk power systems at the transmission level. Turbines ranging...
Utilisation of wind energy to generate electricity has attracted considerable attention worldwide, and is rapidly-growing. The integration of large wind farms with high voltage direct current (HVDC) transmission network could be one of the preferred options for supplying bulk power over a long distance. Since HVDC rectifier stations with constant current control may introduce negative damping on the...
Following with the advance of wind power technology, as well as the advantages in abundance of sea resources, comparatively stable wind speed, relatively fewer developing interest sides, and non-trying for land with other projects, large scale of offshore wind farm building becomes new trend of wind power industry development. But, offshore wind farms are difficult construction, with high requirements...
This paper presents an RST controller design applied to a horizontal wind turbine, functioning in the above rated wind speeds area. The controller presented here, is a robust digital controller which aims to regulate the wind turbine rotor speed through collective blade pitch control. The paper starts with a state of the art of wind turbines and their problematic and continues with the design of the...
Wind generators represent a very interesting means for renewable energy harvesting, both grouped in large grid-connected farms and as small units contributing to supply isolated loads such as farms or villages located in remote regions. This paper describes the structure and control of a small-size self-orienting fixed-pitch wind genset using a 3-phase permanent magnets synchronous machine connected...
Variable speed wind generation systems are more attractive than fixed-speed systems because of the more efficient energy production improved power quality, and improved dynamic performance during grid disturbances. In this sense, to implement maximum wind power extraction, most controller designs of the variable-speed wind turbine generators employ anemometers to measure wind speed in order to derive...
Genetic algorithms are proposed for optimal placement of hybrid PV-wind system (HPWS) and for determining the optimal ratio of wind/solar power contributions. The total capacity of HPWS is determined based on estimated annual power demand, average wind speed and sun radiation. Each PV and wind unit is defined based on real environmental conditions. To improve HPWS performance under different operating...
Wind energy conversion systems is now occupying important space in the research of renewable energy sources. There is a need for more research on wind generators, power converter topologies etc. In this paper behavior of wind generator have been studied in MATLAB. Generator used here for study is permanent magnet synchronous generator (PMSG). This paper also provides comparison of different power...
Wind energy conversion systems have become important in the research of renewable energy sources. This is not a small part due to the rapid advances in the size of wind generators as well as the development of power electronics and their applicability in wind energy extraction. However, wind energy has a drawback of having only 1/800 density as compared to that of water energy, and it does not remain...
This paper presents the novel implementation of memetic algorithm with GA (genetic algorithm) and MADS (mesh adaptive direct search), which is applied for optimal design methodology of electric machine. This hybrid algorithm has been developed for obtaining the global optimum rapidly, which is effective for optimal design of electric machine with many local optima and much longer computation time...
In Thailand, according to the Power Development Plan (PDP 2007), during the year 2007-2021, the government of Thailand plan to have the most economic power generation resources yet reliable and least environmental impact. At the present time, in addition, the emerging energy crisis resulting from an uncertainty price of crude-oil and the emerging global warming crisis results from carbon dioxide emission...
In this paper, a comprehensive time domain model for a wind park, suitable for stability analysis, is presented. The wind generator is modeled with a reduced order model for an asynchronous machine, whilst the wind turbine model takes into account the dimension of the turbine, the rotor blade and blade pitch angle. Each wind generator incorporates a STATCOM (static compensator) controller in order...
The global electrical energy consumption is still rising and there is a steady demand to increase the power capacity. It is expected that it has to be doubled within 20 years. The production, distribution and use of the energy should be as technological efficient as possible and incentives to save energy at the end-user should be set up. Deregulation of energy has lowered the investment in larger...
According to the special form and structure of concentrated wind energy turbine, and based on the idea of largely use of wind energy, the author designed an automatic control system, which can control the wind facing of wind turbine and change bladepsilas pitch angle. Under the control this system, the concentrated wind energy turbine can not only meet the demand of wind facing under normal conditions,...
The exigencies created by the shortage of energy supplies and the ever-growing air pollution stress the need for an alternative solution to the on-board power generation. The purpose of this paper is to develop a novel switched reluctance wind power generator (SRWPG) system for electric vehicles (EVs), which can convert the wind power into electric power so as to charge a battery or support other...
The paper mainly analyzes the Nordex N43/600 wind power system based on an investigation of wind farm. Wind turbine's structure and parameters are introduced. It also introduces the electric control system through the following aspects: The eletricity circuit, the grade of voltage, the parameters which are measured or controled, the main controller and the soft connection control module. Finally it...
Wind Power is a clean and renewable energy technology that is generated, most commonly through the use of a three-bladed wind turbine mounted on a tall tower (80 m - 100 m). Although wind power is most commonly generated by larger, utility scale wind turbines (1.5 MW - 3 MW in size), smaller capacity (< 500 kW) wind turbines have also been used in commercial and community projects, but at a cost...
A research platform, which is designed for a novel smart-blade wind turbine system, is presented. The proposed platform, which allows for the integration of different renewable sources, consists of a smart-blade wind turbine, a permanent magnet (PM) generator, a rectifier, a hybrid super-capacitor/battery energy buffer, and a boost and bi-directional converter. The PM generator, designed for the power...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.