wind energy turbine Articles
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Optimal Power Flow under Variable Wind Generation
In this paper Optimal Power Flow (OPF) problem is solved for a power system, which includes wind power as an additional generation input under variable load conditions. The fixed-speed Wind Turbine Generator (WTG) option is considered in this study: simulations have been performed for various sizes of wind farm attached to the IEEE 30-bus systems using the DIgSILENT Power Factory simulation ...
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A summary of wind power impacts on electric power system operating costs
Wind power plant output depends on wind speed. Such speeds cannot be accurately predicted over daily periods because the wind fluctuates from minute-to-minute and hour-to-hour. Consequently, electric utility system planners and operators are concerned that variations in wind plant output may increase the operating costs of the system. This concern arises because the system must maintain balance ...
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Vector control of current regulated inverter connected to grid for wind energy applications
Connecting variable speed wind turbine connected to the grid requires a proper control of the inverter to improve the power quality for the system. The vector control of an inverter connected to the grid is presented. The proposed control technique implies a hysteresis current controller in the inner loop. The complete control system has been developed, analysed, and validated by simulation ...
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Analysis of wind power in Danish electricity supply, 2005-2007
It is frequently said that wind power covers about 20% of electricity consumption in Denmark. The correct statement is that production of electricity by Danish wind turbines corresponds to about 20% of electricity consumption. A considerable fraction of the energy produced by wind turbines is exported to neighbouring countries and therefore is not used in Denmark. But how does one know that the ...
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Energy and exergy assessments for potential wind power in Turkey
The main objective of the study is to estimate wind power potential of Turkey and provide suitable data for evaluating potential wind power by using the wind data collected at 23 different wind-monitoring stations. In this study, energy and exergy analyses of wind power are used to estimate wind power potential in these areas. Exergy analysis of wind power is investigated according to air ...
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Renewable energy production issues with the Cape Cod offshore wind energy programme
This paper evaluates the first offshore wind farm proposal in the USA. It is being put forward by Cape Wind Associates, a Boston-based firm that wishes to build 170 turbines five miles offshore in Nantucket Sound. The proposed development would supply up to 95% Cape Cod's energy needs and 2% of the energy requirements for the eastern New England region, preventing the need for additional fossil ...
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Wind power prefeasibility study for agricultural applications in Kerman, Iran: a case study
In the present paper, wind characteristics have been analysed for three agricultural sectors in Kerman (30°15'N,56°58'E), Iran. Wind data collected from three synoptic stations for the period of July 2006 to June 2011 at the height of 40 m has been used to study the monthly and annual wind energy potential. Two statistical methods (Meteorological and Weibull) have been applied to ...
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Analysis of vertical wind shear in the Southern Great Plains and potential impacts on estimation of wind energy production
This paper describes the analysis of near-surface wind speeds in Western Oklahoma. The goals of this research are to characterise the nocturnal low-level jet (LLJ) in the region, and to assess the impact wind variability, vertical shear and the LLJ on wind energy calculations. Results show the seasonal variability in wind characteristics as well as in the vertical wind shear, and also illustrate ...
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Multi-megawatt wind turbines for offshore use: aspects of Life Cycle Assessment
Life Cycle Assessment (LCA) is an instrument to quantify environmental impacts of the entire energy supply chain. According to the LCA, an appropriate indicator system should comprise all steps of a system's life cycle: production, operational and disposal processes ("cradle-to-grave"). Cumulative Energy Demand (CED) might be seen as one part of LCA as far as the depletion of energy resources in ...
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Terminal characteristics of type 1 wind generating systems with magnetic saturation
This paper proposes a simple method of incorporating magnetic saturation in determining terminal characteristics of a type 1 wind generating system employing a squirrel–cage induction generator. In determining the terminal characteristics, the generator is represented by its traditional per–phase equivalent circuit as well as two–axis model. In both cases, the magnetic saturation is carefully ...
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Assessing the benefits of a provision of system services by distributed generation
Distributed Generation (DG) units are said to have the potential to become an integral part of the future power systems. Today, DG units are characterised by high specific investment costs, but nevertheless are politically promoted because of their high degree of energy efficiency and their capability of reducing the current dependency on fossil fuels. However, at longer term DG units have to ...
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Combined fuel cell?gas turbine plant for highly efficient power generation from renewable energy sources
The impact of renewable energy sources on today's energy supply substantiates the importance of hydrogen as an energy carrier. Hydrogen can be directly produced from solar energy and is considered a promising technology for temporary storage of electrical energy from wind turbines and photovoltaic systems. The generation of electrical energy from stored hydrogen requires highly efficient systems ...
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Adiabatic compressed air energy storage plants for efficient peak load power supply from wind energy: the European project AA-CAES
With the continuing expansion of electricity generation from fluctuating wind power the grid-compatible integration of renewable energy sources is becoming an increasingly important aspect. Adiabatic compressed air energy storage power plants have the potential to make a substantial contribution here. The present article describes activities and first results relating to this technology that are ...
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Comparative life cycle assessment of 2.0 MW wind turbines
Wind turbines produce energy with virtually no emissions, however, there are environmental impacts associated with their manufacture, installation, and end of life. The work presented examines life cycle environmental impacts of two 2.0 MW wind turbines. Manufacturing, transport, installation, maintenance, and end of life have been considered for both models and are compared using the ReCiPe 2008 ...
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Operation and control of multiple Distributed Generation systems in the microgrid
This paper investigates the operation and control of multiple Distributed Generation (DG) systems interconnected to the utility in the form of microgrid. The developed model of the microgrid consists of microturbine generation system, converter-based DG system with stiff DC source, synchronous-generator-based DG system and wind power system with induction generator. The Simulation model of the ...
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Robust vector control strategy for variable speed wind turbines
The efficiency of the wind power conversions systems can be greatly improved using an appropriate control algorithm. In this work, a robust control for variable speed wind power generation that incorporates a doubly feed induction generator is described. The electrical systems incorporate a wound rotor induction machine with back–to–back three phase power converter bridges between its rotor and ...
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What’s the Future of R&D in the Wind Industry?
When the wind industry finally reacted to the world’s financial crisis—it didn’t fully hit us until 2010—at once, we lost both an incredibly vibrant global wind market and sufficiently robust profit margins. The market recovery is rebounding nicely now, thanks largely to government incentives, but profit margins will probably never fully recover—at least, not to the ...
By NRG Systems
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How sustainable are our energy technologies? Photovoltaics and wind energy systems as examples
The energy sector plays a key role within the concept of Sustainable Development. Therefore, sustainability aspects should be considered when new energy systems are assessed. How does a specific supply option contribute to a desired sustainable development of the energy system? To answer this question, indicators are needed. These should cover the most significant sustainability issues of the ...
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Research and development in ocean energy technologies
The volatile fuel prices for electricity generation, elevated concerns about global warming and energy security has prompted countries to look for alternative energy sources. One of the alternative energy sources is ocean energy. Currently, there is few ocean energy technologies that are commercially available to harness electrical energy from ocean despite the fact that ocean covers more than ...
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Performance estimation of HAWT blade using NACA airfoils
Wind energy is one of the developing resources of renewable energy. In order to increase the use of wind energy, development of wind turbine blade with higher power coefficient plays a vital role. The work being presented here is to give new design of blade for VESTAS V82–1.65MW (HAWT). In this work, NACA airfoils are used for the determination of aerodynamic performance characteristics of ...
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