Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"Wind Energy Systems"”.
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Optimization and control of wind energy systems for grid integration
Wind energy is a rapidly expanding source of renewable energy, but wind resources are highly intermittent. This makes increasing the level of wind energy penetration in an overall energy portfolio challenging if power quality and grid frequency is to be maintained. In a conventional power system, …
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A composite converter architecture for wind energy systems tied to an AC grid
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Integration of wind energy systems into the grid: power quality and technical requirements
The integration of wind energy into the utility network has increased significantly over the past years largely as a result of the increasing environmental concerns arising from the use of fossil fuels, coupled with the anticipated global increase in oil. In South Africa, the wind energy industry …
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Impact assessment of large-scale penetration of permanent magnet synchronous generators on power quality
Wind power generation has gained a large share in the renewable energy market over the past few years. This study investigates the impact of large scale penetration of permanent magnet synchronous generator (PMSG) based wind turbines on power quality of the grid. PMSGs are attractive due to the …
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The conversion of wind power to electrical power
The electrical-producing windmill industry boomed during 1983. It was estimated that"unit sales during 1983 would be twice those of the prior 10 years combined." Most of the activity has been in the development of windfarms in the western states and Hawaii. The boom is largely due to (1) tax breaks …
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Fully coupled dynamic analysis of a floating wind turbine system
The use of wind power is in a period of rapid growth worldwide and wind energy systems have emerged as a promising technology for utilizing offshore wind resources for the large scale generation of electricity. Drawing upon the maturity of wind turbine and floater technologies developed by the wind …
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Critical Evaluation of DC-Grid and Strong Grid-Forming Wind Generator Systems
The global transition to renewable energy has intensified challenges related to grid stability and material sustainability in wind power systems. This research addresses two critical issues: the declining grid strength due to inverter-based resource integration, and the dependency on rare-earth …
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Overvoltage Prevention in Low Voltage Rural Distribution Network with High Penetration of Wind Energy
<p>Distribution systems are typically designed to operate in a single power flow direction: from the substation to the load. However, the integration of distributed energy resources, such as wind energy systems, can change the direction of the power flow, leading to a voltage rise in the feeder. In …
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Development of a new integrated sustainability assessment model for energy systems
… sustainability assessment model for energy systems. The model features an integrated approach and encompasses various multi-disciplinary areas of study, which influence energy systems. Two case studies are used to implement this model including solar photovoltaic and wind energy …
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Modeling And Control of Variable Speed Wind Turbines
Wind power is the most commonly used renewable energy source over the past decades. Among the wind turbine systems, Variable speed wind turbines are the most preferred one since it is cheaper, more efficient and has more of control capabilities over the produced active and reactive power. This …
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Boost Matrix Converters in Clean Energy Systems
… to the existing solutions in residential wind-energy systems, where a low-voltage variable-speed generator feeds power to the higher-voltage fixed-frequency grid.Comprehensive analytical derivations and simulation results were carried out to investigate the operation of the proposed …
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Forecasting Wind Direction Across Very Short and Short Term Time Horizons for Wind Turbine Control
Wind energy systems will require improved efficiency to meet future electricity demands in alignment with net-zero goals. Wind turbine yaw control systems can provide incremental improvements in power efficiency across both individual turbines and the collective wind farm. Yaw control strategies …
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Ultracapacitors for off grid wind power systems
The main reason for wind turbine to be not as prevalent as traditional power systems is because they do not have an effective storage capacity. However, researchers in material science and engineering have found ways to resolve this problem by developing "ultracapacitors" that store energy by …
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Design of a Vernier Permanent Magnet Wind Generator
The rise in popularity of renewable energy solutions, in particular wind energy systems, has resulted in a greater demand for low-speed direct-drive machines. The Vernier machine has inherent properties such as high torque density, sinusoidal induced voltages and low torque ripple which makes it …
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Comparison of low voltage ride through capabilities of synchronous generator with STATCOM and DFIG based wind farms
Increase in wind generation and grid-integration of wind energy technologies has resulted from an increasing demand of cheap and clean electricity across the globe. Wind generators are available as small, medium and large scale electric generators, usually in the range of 1kW to 100MW and are …
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Performance and Evaluation of a Variable-Speed Darrieus Wind Turbine
<p>Developing wind energy suitable for agriculture applications is a critical step towards providing a reliable, affordable energy supply for United States agriculture. United States agriculture, due to its energy intensive nature-, is dependent on petroleum fuels. Because agriculture is extremely …
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Experimental and Numerical Investigations of the Aerodynamics of Flexible Inflatable Wings
… involves a push towards utilizing renewable energy sources and cementing energy independence for future generations, the design of more efficient aircraft and novel energy systems is of utmost importance. This dissertation looks at leveraging some of the benefits offered by inflatable wings …
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Control design and energy optimisation of a buoyant airborne wind turbine
Airborne Wind Energy Systems (AWES) aim to capture the wind energy potential at high altitudes by using a combination of tethers and bespoke aerofoils. In contrast to conventional horizontal axis wind turbines (HAWT), the tower is replaced with lightweight tethers resulting in a reduction in both …
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Modeling of Small-Scale Wind Energy Conversion Systems
As wind turbines are increasingly being adopted for meeting growing energy needs, their implementation for personal home use in the near future is imminent. There are very few studies conducted on small-scale turbines in the one to two meter diameter range because the power generated at this scale …
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AI-based hybrid optimisation of multi-megawatt scale permanent magnet synchronous generators for offshore wind energy capture
… fossil fuels still dominated the global final energy landscape. Technological advances and rapid deployment of various renewable energy technologies have demonstrated their potential at reducing the worlds dependency on fossil fuels and their negative impacts. Presently, wind energy is the most …
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