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 18 of 18 for “"load variation"”.
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Robust Control of a Multi-phase Interleaved Boost Converter for Photovoltaic Application using µ-Synthesis Approach
… area for distributed power generation. During load variation or power supply changes due to the weather changes the output voltage requires a robust control to maintain stable and perform robustness.</p> <p>Connecting converters in series and parallel have the advantages of modularity, …
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Load-Independent Class-E Power Conversion
… induction heating, and plasma pulsing. The load current in these applications usually varies over a range. Efficiency of a conventional Class-E design degrades dramatically due to the hard switching beyond the optimum conditions. Keeping ZVS with load change in a Class-E topology is …
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High frequency switching parallel processing topology for AC uninterruptible power supply
… to describe the system behaviour against the load variation and the input disturbance. The detailed design of the output voltage control loop is carried out. A transient analysis is presented to describe the transition between the two operation modes of ac line supply and dc battery backup. …
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Novel Current-Fed Boundary-Mode Parallel-Resonant Push-Pull Converter
… ensures that ZVS occurs across the full range of load variation. Furthermore, the switching scheme allows significantly increased flexibility in component tolerances compared to traditional resonant converter designs. The converter also demonstrates indefinite short-circuit protection and true ZVS …
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Adaptive batching of streams to enhance throughput and to support dynamic load balancing
… variable operating conditions such as server load variation, changes in data ingestion rates, and workload characteristics. In this thesis, we explore the effects of the batch size on the performance of streaming workloads by developing an adaptive batching framework and building …
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The Relevance Of Load Following Capability Of Nuclear Power Plant For The South African Grid
… main focus of this study is to evaluate whether load following operation can be performed using the existing South African nuclear power plant. Of which, knowing that will assist in determining whether the addition of load following capabilities on the planned nuclear fleet is justifiable or not. …
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LOW-POWER LOW-VOLTAGE ANALOG CIRCUIT TECHNIQUES FOR WIRELESS SENSORS
… and a digital loop LDO whose line and load variation response is improved. These techniques will boost the design of the wireless sensor and they can also be used in other similar low power design.</p>
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Techniques for efficient radio frequency power conversion
… to efficiently deliver power into a varying load. While some of these existing and emerging applications are characterized with narrowband or single-frequency operation, others require operation over a range of frequencies. In such applications, the system architecture typically comprises an …
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Integral twist actuation of helicolpter rotor blades for vibration reduction
… the impact upon the fixed- and rotating-system loads is estimated by the analysis. While discrepancies are found in the amplitude of the loads under actuation, the predicted trend of load variation with respect to its control phase correlates well. It was also shown, both experimentally and …
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An experimental study of the oil evolution in critical piston ring pack regions and the effects of piston and ring designs in an internal combustion engine utilizing two-dimensional laser induced fluorescence and the impact on maritime economics
… predictable at each operating point. Speed and load variation alter the basic flow pattern and oil balance through a corresponding change in inertia and gas dragging effect respectively, with ring design variation instigating specific and repeatable phenomenon onto the consistent oil flow …
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Modelagem analítica da operação cronológica de reservatórios no despacho probabilístico de geração
… of dispatching generation resources to meet load requirements along the planning period. These models should describe in detail the actual operation of the generation system and should estimate costs under plausible alternative scenarios. The objective of evaluating the variables of the …
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Simulating Dynamic Vehicle Maneuvers Using Finite Elements For Use In Design Of Integrated Composite Structure
… structures requires more details of the loading conditions and evaluation metrics than the mild steel structures they are replacing. The prototypical FSAE steel space frame chassis designs are heavily structured around the mandated safety rules that doubled as mostly satisfactory …
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Drivers of Dengue Within-Host Dynamics and Virulence Evolution
… fit these mathematical models to viral load data of dengue patients to understand the mechanisms that drive variation in viral load. I specifically consider the roles that immune status, clinical disease manifestation, and serotype may play in explaining viral load variation observed …
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Development of a specialised test rig for assessing the efficiency of large industrial induction machines
… which requires the use of a dynamometer as the load machine. Numerous tests need to be performed to assess the efficiency of induction machines. In most cases, the manufacturer of the machines quotes the efficiency, but in some instances, the difference between the laboratory results and the …
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On-line Dynamic Security Assessment in Power Systems.
… sags. The first sensitivity type is called load voltage sensitivity and allows identifying which bus voltages are affected by a change in rotor angle of a particular generator. % It is shown that the derived load voltage sensitivities for example allow to determine the contribution of each …
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Design, integration schemes, and optimization of conventional and pressurized oxy-coal power generation processes
… aspect considered is flexibility with respect to load variation. Particularly with the increase of the power generation from intermittent renewable energy sources, coal power plants should operate at loads far from nominal, down to 35%. In general this results in efficiency significantly lower …
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Active Source Management to Maintain High Efficiency in Resonant Conversion over Wide Load Range
… alternative when the quality factor of the load is significantly high. The input current of a CF resonant inverter is considerably smaller than the output current, which benefits efficiency. A simple, parallel resonant tank is sufficient to create a high-power sinusoidal signal at the …
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PMU-Driven Fault Location in Distribution Systems with DERs: Impedance-Based and Multi-Agent System Strategies
… reactance-to-resistance ratios, and unbalanced loads. These factors complicate system awareness and observability, making fault detection and isolation essential for rapid reconfiguration and service restoration. The growing demand for power quality, security, and reliability has driven …