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 6 of 6 for “"Below-rated"”.
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Below-Rated Control of Swept-Blade Wind Turbines
… of the research was to further increase below-rated, variable speed, power capture when using swept-blades. When operating in the variable speed region, the turbine’s torque is proportional to the square of the generator speed, and k is the proportionality constant (T = kΩ 2 ). Initial …
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Full envelope wind turbine controller design for power regulation and tower load reduction
… turbine is to maximize its energy capture in below rated wind speeds through the controller. A thorough assessment of what is possible in a modern MW scale wind turbine is undertaken in this thesis. A full envelope single input single output controller is designed to be used as a benchmark for …
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A framework for dynamic characterization and short-term thermal capability assessment of electric machines and inverters in motor drives
… handle up to 25 times more heat dissipation than rated for 30 seconds and twice the rated heat dissipation for 60 minutes. A self-limiting control strategy is developed that exploits these capabilities and protects the drive from overheating. Results suggest that these machines may be safely …
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Advanced controls for floating wind turbines
… energy extraction by the Wind Turbine in the below rated power region. The proposed controllers are variations of a Linear-Quadratic Regulator (LQR), considering both a steady-state case and a non-stationary, finite horizon LQR case. The latter requires wave-elevation forecasting to be …
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The design of a residential water-to-water heat pump
… and therefore have machinery idle or operating below rated load and efficiency during the minimum consumption periods. To help offset this economically adverse condition, the power companies are in many areas willing to give rate discounts to consumers using electric heating, as the greatest …
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Design and Analysis of a Small-Scale Wind Energy Conversion System
… is to maintain MPPT while the wind speed is below rated value and to limit the electrical power and mechanical speed to be within the system ratings when the wind speed is above the rated value. The concept of stall region and stall control is introduced and a stability analysis for the …