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Дисертації з теми "090607 Power and Energy Systems Engineering (excl. Renewable Power)"
Hung, Duong Quoc. "Smart integration of distributed renewable generation and battery energy storage." Thesis, The University of Queensland, 2014. https://espace.library.uq.edu.au/view/UQ:342027.
Повний текст джерелаKelso, Ross. "Open access to next generation broadband." Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/12663/1/12663a.pdf.
Повний текст джерела(9970334), Sofia Paola Espinell Gonzalez. "PUERTO RICO POWER SYSTEM TRANSITION TO RENEWABLE ENERGY." Thesis, 2021.
Знайти повний текст джерелаPuerto Rico’s lack of effective and affordable energy substitutes after Hurricane Maria resulted in a mortality increase of 4,970 residents (Verma, Murray, and Mamdani, 2018). Puerto Rico’s Island dependency on electric power and no energy substitutes available have provoked a risk to human life after catastrophic events. The problem was measured by comparing Puerto Rico’s reliance on fossil fuels with accessible and economical renewable energy options. Solar photovoltaic (PV) technologies are the optimum alternative to transition from fossil fuel usage to renewable energy. Previous research has demonstrated the impact of using solar panels instead of an electric grid due to the constant solar radiation throughout the year. The analyzed data and projections showed a reduction in fossil fuels and carbon dioxide emissions by implementing solar photovoltaic technologies. The installation of PV systems in landfills, household roofs and transitioning to solar public lighting positively impacts the atmosphere carbon dioxide emissions.
(9748934), Sugirdhalakshmi Ramaraj. "A HYBRID NETWORK FLOW ALGORITHM FOR THE OPTIMAL CONTROL OF LARGE-SCALE DISTRIBUTED ENERGY SYSTEMS." Thesis, 2020.
Знайти повний текст джерела(7041383), Carl J. Olthoff. "Computation of Large Displacement Stability Metrics in DC Power Systems." Thesis, 2019.
Знайти повний текст джерела(9187742), SAYEDMOHAMMADMA VAEZ MOMENI. "FEED-FORWARD NEURAL NETWORK (FFNN) BASED OPTIMIZATION OF AIR HANDLING UNITS: A STATE-OF-THE-ART DATA-DRIVEN DEMAND-CONTROLLED VENTILATION STRATEGY." Thesis, 2020.
Знайти повний текст джерела(6615489), Gregory Vaughan. "Determining One-Shot Control Criteria in Western North American Power Grid with Swarm Optimization." Thesis, 2019.
Знайти повний текст джерелаThis thesis primarily used particle swarm optimization (PSO) with inertia to determine a well-adapted set of parameters. The parameters included up to three thresholds for indices calculated from frequency. The researchers found that the best method for distinguishing between one or more phase faults used thresholds on two Fourier indices. Future lines of research regarding one-shot controls were considered.
generation events from transient swings caused by other events.
This thesis found that using local modes is generally useful to diagnose and apply one-shot controls when instability is caused by one or more phase faults, while when disconnected generators or reduced loads cause instability in the system, the local modes did not distinguish between loss of generation capacity events and reduced load events. Instead, differentiating based on the rate of change of frequency and an initial upward deflection of frequency or an initial downward deflection of frequency did distinguish between these types of events.
(9581096), Olatunji T. Fulani. "A Heterogeneous Multirate Simulation Approach for Wide-bandgap-based Electric Drive Systems." Thesis, 2021.
Знайти повний текст джерелаRecent developments in semiconductor device technology have seen the advent of wide-bandgap (WBG) based devices that enable operation at high switching frequencies. These devices, such as silicon carbide (SiC) metal-oxide-semiconductor field-effect transistors (MOSFETs), are becoming a favored choice in inverters for electric drive systems because of their lower switching losses and higher allowable operating temperature. However, the fast switching of such devices implies increased voltage edge rates (high dv/dt) that give rise to various undesirable effects including large common-mode currents, electromagnetic interference, transient overvoltages, insulation failure due to the overvoltages, and bearing failures due to
microarcs. With increased use of these devices in transportation and industrial applications, it is imperative that accurate models and efficient simulation tools, which can predict these high-frequency effects and accompanying system losses, be established. This research initially focuses on establishing an accurate wideband model of a surface-mount permanent-magnet
ac machine supplied by a WBG-based inverter. A new multirate simulation framework for predicting the transient behavior and estimating the power losses is then set forth. In this approach,
the wideband model is separated into high- and low-frequency models implemented using two different computer programs that are best suited for the respective time scales. Repetitive execution of the high-frequency model yields look-up tables for the switching losses in the semiconductors, electric machine, and interconnecting cable. These look-up tables are then incorporated into the low-frequency model that establishes the conduction
losses. This method is applied to a WBG-based electric drive comprised of a SiC inverter and permanent-magnet ac machine. Comparisons of measured and simulated transients are provided.
(10725597), Omkar Mahesh Parkar. "Multi-Objective Optimization of Plug-in HEV Powertrain Using Modified Particle Swarm Optimization." Thesis, 2021.
Знайти повний текст джерела(11192433), Lucas Martin Peralta Bogarin. "A Comparison of Models and Approaches to Model Predictive Control of Synchronous Machine-based Microgrids." Thesis, 2021.
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