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 25 for “"busbar"”.
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Pulsed-Power Busbar Design for High-Powered Applications
… and construction process of a high-powered busbar system that is to be implemented in pulsed-power applications. In order to obtain a robust system capable of handling in excess of 25kJ, both mechanical and electrical analyses were performed to verify a capable design. The following …
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BEHAVIOR OF BUSBAR DIFFERENTIAL RELAYS WITH AIR-GAP CORE CURRENT TRANSFORMERS
… CT Simulator. Then, two commercially available busbar differential relays with CT saturation detection logic were subjected to the output waveforms of solid-core and air- gap core CTs. After testing about hundred scenarios on each relay, it is concluded that first, there is no difference in the …
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PCB Busbar Design and Verification for a Multiphase SiC-based All-electric Aircraft Powertrain Converter
… a printed circuit board (PCB) based heavy copper busbar design and verification are introduced for a SiC based 250 kW multiphase drive system operated at 40,000 ft. Finite-element analysis (FEA) simulation studies of the PCB busbar are conducted to optimize the electric field intensity. Busbar …
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Pulsed Laser Dielectric Ablation for Copper-plated Silicon Solar Cells
… field (BSF) and PERC cells and resulted in low busbar pull forces. Although busbar pull forces > 1 N mm-1 could be readily achieved on Al BSF cells with minimal electrical impact on the cells, PERC cells were more sensitive to laser damage and comparable busbar adhesion could not be achieved …
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Design and Validation of A High-Power, High Density All Silicon Carbide Three-Level Inverter
… design for converter, such as the laminated busbar, are the focus in this dissertation. The optimized busbar structure can effectively reduce stray inductance in the current-commutation loop, reducing switching overshoots of power modules and increasing semiconductor reliability. The …
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Non-linear excitation and governor control
… with a single machine connected to an infinite busbar as well as multimachine systems were considered. Control laws for rotor angle and field flux are derived. The closed loop system is shown to be asymptotically stable. The system can be transferred to a new operating condition corresponding to …
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Nonlinear dynamics in power systems
… instabilities in a single-machine quasi-infinite busbar system. The system’s behavior is described by the so-called swing equation, which is a nonlinear second-order ordinary-differential equation with additive and multiplicative harmonic terms having the frequency Ω. When Ω≈ω₀, and Ω≈2ω₀, where …
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Enhanced geothermal energy and cogeneration : design, technology and economics
… industrial case studies. Overall system busbar cost for electricity produced and various thermodynamic efficiency measures will be used as metrics to access the effectiveness of cogeneration design in HDR power generation. Lastly, this research is used to qualitatively evaluate the …
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Impact of solar photovoltaics on the system stability of the Zambia national grid
… of Solar PV could be injected into the 132 kV busbars resulting in additional loading of about 25.5 % and 31.5 % on the respective busbars, without adverse effects. However, an uncontrolled loss of generation for the 123 MW and 121 MW Solar PV power at Leopards Hill and Lusaka West would result …
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Impact of solar photovoltaics on the system stability of the Zambia national grid
… of Solar PV could be injected into the 132 kV busbars resulting in additional loading of about 25.5 % and 31.5 % on the respective busbars, without adverse effects. However, an uncontrolled loss of generation for the 123 MW and 121 MW Solar PV power at Leopards Hill and Lusaka West would result …
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Option approach to investment in modular nuclear electricity-generating capacity
… due to its flexibility that the traditional Busbar cost analysis fails to capture. We analyze different scenarios that highlight the fact that the value of the expansion option is particularly sensitive to the cost of the first module as compared with the following ones. In addition we show …
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Multifaceted Codesign for an Ultra High-Density, Double-Sided Cooled Traction Inverter Half Bridge Module
… inverter configuration. Co-designed with the busbar and gate driver, the custom power module stresses efficient heat dissipation, minimized parasitic inductance, and a compact footprint. Key target parameters to achieve optimal performance include a Rdson below 20 mΩ, Rthjc under 0.2 K/W and a …
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A novel configuration of all-optical differential protection scheme
… the optical differential protection schemes for busbar protection. However, these optical differential schemes adopt mixed optical-numerical processes that use a platform based on modern numerical/microprocessor protection schemes. Therefore, opportunities to improve these mixed optical-numerical …
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A tool for analyzing the evolution of non-uniformities in lithium-ion cylindrical battery cells at the module level under various operating conditions
… equivalent circuit framework integrated with a busbar model to account for current imbalances in parallel-connected cells. This model is a common equivalent circuit model used to represent a Li-ion cell using a voltage source, series resistor, and two resistor-capacitor pair connected in …
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Application of Bifurcation Theory to Subsynchronous Resonance in Power Systems
… of two heavily loaded single-machine-infinite-busbar power systems modeling the characteristics of the BOARDMAN generator with respect to the rest of the North-Western American Power System and the CHOLLA# generator with respect to the SOWARO station. In the BOARDMAN system, we show that there …
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Distributed Electric Aircraft Propulsion Architectures with Fault Protection Strategy
… propulsion motors for a fault in the main busbar. This thesis introduces enhanced fault-tolerant architectures, which are designed to overcome the above issues with traditional radial architecture, without the need of isolating several propulsion motors for a fault in the system. The …
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Study of photovoltaic (PV) module interconnections failure analysis and reliability
… designs. The results show that the Multi-Busbar interconnection design improves solder joint creep-fatigue life (up to 15%) and consequently provides higher thermo-mechanical reliability for the solar PV modules compared to other studied designs (Conventional and the Light Capturing Ribbon …
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Thermomechanical Stress in Solar Cells and Modules: A Finite Element Modelling and Experimental Investigation
… to analyse the stress evolution in Multi-Busbar (MBB) tiled modules after soldering and lamination. The impact of cell overlapping in modules and the selection of solders on maximum stress and stress distribution of MBB modules was investigated. Simulation results predicted that a maximum …
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Optimal sizing and placement of independent power producers on MV, HV and EHV networks for minimum power line losses using neural networks
… from the IPP at the POC to the sending end busbar as a percentage of the total backbone length (km) and the load power factor at the receiving end. Based on these inputs, the model determines the most suitable IPP location, IPP size, interconnecting conductor and IPP power factor in order to …
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Optimal sizing and placement of independent power producers on MV, HV and EHV networks for minimum power line losses using neural networks
… from the IPP at the POC to the sending end busbar as a percentage of the total backbone length (km) and the load power factor at the receiving end. Based on these inputs, the model determines the most suitable IPP location, IPP size, interconnecting conductor and IPP power factor in order to …
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