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 34 for “"electric system"”.
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Smart Grid Technologies for Efficiency Improvement of Integrated Industrial Electric System
… plants with co-generation capability and the electric utilities in providing the most optimum scheme for buying and selling of electricity in such a way that the fuel consumption is minimized, reliability is increased, and time to restore the system is reduced. A typical industrial plant load …
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Design and Optimization of a Mobile Hybrid Electric System to Reduce Fuel Consumption
… dire need for the US military. A towable hybrid electric system can help relieve these issues by replacing less fuel efficient standalone diesel generators to deliver power to company encampments. Currently, standalone generators are sized to meet peak demand, even though peak demand only occurs …
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Modeling of a Hybrid-Electric System and Design of Control Laws for Hybrid-Electric Urban Air Mobility Power Plants
… and technology in the aerospace industry. These systems are being developed to overcome traffic congestion. The current designs make use of Distributed Electric Propulsion (DEP): either fully electric or hybrid electric. The hybrid engine system consists of two power sources: prime movers, such …
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Um sistema de apoio à decisão bicritério para o planejamento da operação energética
The energy aspects of the electric system operation planning in the Brazilian interconnected system are still outlined according the paradigm of the post-war period, in which all the efforts sought the automation of most decisions, through the crescent sophistication of the computational models, …
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Design Optimization of a Regional Transport Aircraft with Hybrid Electric Distributed Propulsion Systems
… X-57, is one such concept using distributed electric propulsion (DEP) technology. Although practical implementation of DEP is achievable due to the scale invariance of highly efficient electric motors, the current battery technology restricts its adoption for commercial transport aircraft. A …
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Inquiry into the differential between public municipal ownership of water and electric supply in Texas.
… susceptible to municipal ownership, and public electric supply is typical of those few utilities that have been resistent to this type of ownership. Municipal ownership of water supply in Texas began in the 1870's and has grown very rapidly, so that today the water system in 92.1 percent of all …
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EXPERIMENTAL AND MODELING ANALYSIS OF ELECTRIC SYSTEMS WITH HIGH CAPACITIVE AND INDUCTIVE COUPLINGS
… thesis Experimental and Modeling Analysis of Electric Systems with High Capacitive and Inductive Couplings investigates several kinds of electromagnetic coupling which inuence strongly the electric system operation. The electromagnetic coupling is a fundamental phenomenon that governs the …
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Evaluation of Methods for Control of Vegetation in Utility Corridors
… competing interests – a reliable and economic electric system on one side, and public perceptions and environmental concerns on the other, a successful program must use a combination of control methods.</p>
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Does GRID Alternatives Impact Greenhouse Gas Emissions Reduction Targets in Central Coast Climate Action Plans?
<p>As of March 2016, GRID Alternatives’ 179 solar electric system installations on low-income housing contributed 103 metric tons of carbon (MT CO<sub>2</sub>e) emissions reduction for the climate action plans’ <em>Energy</em> or <em>Renewable Energy</em> c<em>limate action measures</em> that …
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Resilient decarbonization for the United States : lessons for electric systems from a decade of extreme weather
… for a large-scale effort to decarbonize the U.S. electric power system has become clear, along with the growing climate risks and impacts that any such effort will face. This thesis argues that the principles of resilience can play a valuable role by enabling the decarbonization of the U.S. …
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Guidelines for Developing Low Frequency Model Equivalents in Emerging Electrical Grids
Dynamic model equivalents of power systems is an ongoing topic that continues to be relevant despite computing power advancements. Today's electrical grids are going through significant changes. The integration and installation of technologies that use power electronic devices pose a continuous …
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Application of Modular Multilevel Converters (MMC) Using Phase-Shifted PWM and Selective Harmonic Elimination in Distribution Systems
<p>Reducing the size and weight of a power electric system is a prodigious challenge to researchers as the development of the latest technologies emerge in the field of electrical engineering. A similar urge is there to develop a light-weight mobile power substation (MPS) to use in the electric …
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Projeções de vazões afluentes à usina elevatória Santa Cecília (RJ) a partir de cenários de desmatamento da floresta amazônica e de mudanças climáticas
… on the natural inflow in the Guandu river system using hydrologic modeling based on the response of two different components of the climate system to human action. We used three hypothetical scenarios of deforestation in the Amazon (15%, 50% and 100%) and four future greenhouse gases (GHG) …
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Effect of automotive electrical system changes on fuel consumption using incremental efficiency methodology
… has been a continuous increase in automotive electric power usage. Future projections show no sign of it decreasing. Therefore, the automotive industry has a need to either improve the current 12 Volt automotive electrical system or move to a higher voltage vehicle electric system. Both of …
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Theory and Application of Joint Time-Frequency Analysis On Health Monitoring of Electric Cable and Guided-Waves Detection of Structural Corrosion
<p>The failure of both electric cable in a electric system and pipes in a gas or petroleum transportation system can cause disastrous consequence. It is important to monitoring the health of electric cable and critical pipeline in order to prevent accidents and save repair expenses. In both …
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Network Infiltration: Gaining Utility Acceptance of Alternative Energy Systems
Our American electric system doggedly follows the central station model developed in the late 1800s. Thomas Hughes says the system gained momentum by adding more alliances with educators, politicians, and other industries until the social network was so intertwined with the technology that …
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Design of 1.7 kV SiC MOSFET Switching-Cells for Integrated Power Electronics Building Block (iPEBB)
… high-density converters in power distribution systems, electric ships, and airplanes become more critical as weight and space becomes more a premium. The limited space and footprint require new packaging technologies and methods to develop an integrated power converter. The advancement of …
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The Appalachian Power Company Along the New River: The Defeat of the Blue Ridge Project in Historical Perspective
… Company is an operating company of the American Electric Power Company, the largest electricity producing private electric system in the United States since 1953. The Appalachian Power Company held almost exclusive development rights along the New River since its 1911 charter. From then until the …
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Optimal Operation of Water and Power Distribution Networks
… a comprehensive toolbox for the optimization of electric power and water distribution networks. On the analytical front, the toolbox consists of novel mixed-integer (non)-linear program (MINLP) formulations; convex relaxations with optimality guarantees; and the powerful technique of McCormick …
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Analysis of Electric Disturbances from the Static Frequency Converter of a Pumped Storage Station
… work studies the disturbances created in the electric system of a pumped storage power plant, which is an hydraulic generation facility where the machines can work as turbines or pumps, by the operation of a static frequency converter (SFC). The SFC is used for starting the synchronous …
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