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 “"DC Distribution"”.
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MOSFET-based MMC for low-voltage DC distribution networks
… challenges to the existing low-voltage power distribution networks. In particular, numbers of high-capacity power electronic interfaces, such as electric vehicle (EV) chargers and embedded photovoltaic (PV) generation, have increased significantly. In comparison with conventional AC systems, …
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Dynamic modeling, stability analysis, and controller design for DC distribution systems
"The dc distribution systems or dc microgrids are known to be best suited for integration of renewable energy sources into the current power grid and are considered to be the key enabling technology for the development of future smart grid. Dc microgrids also benefit from better current …
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Modeling, Control and Stability Analysis of a PEBB Based DC Distribution Power System
… blocks for power conversion, regulation and distribution with control intelligence and autonomy. A comprehensive modeling and analysis of a PEBB based DC distributed power system (DPS), comprising of a front end power factor correction (PFC) boost rectifier, a DC-DC converter and a three …
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Design of a 380 V/24 V DC Micro-Grid for Residential DC Distribution
This research will investigate a direct current (DC) micro-grid for power distribution in residential households. DC distribution has a long history, being considered at the beginning with alternating current (AC) distribution; however, due to the ease of distributing AC power over a long distance …
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Machine Learning Enhanced Power Converter Design and Prognostic Health Monitoring in DC Distribution Systems
… efficient energy conversion at every power distribution stage. However, new challenges emerge as the converter-based systems grow in complexity, i.e., from individual power converter design and control to large-scale management of a series of interconnected converters in DC microgrids and DC …
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Small-Signal Modeling and Stability Specification of a Hybrid Propulsion System for Aircrafts
… the turbofan passed through the generator on the dc distribution system, concluding that the rectifier can mitigate the impact. Finally, to ensure the studied system stable operation during the whole flying profile, the thesis provides impedance specifications of the dc distribution system and …
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Stability Methods for Regulated Loads
… pose stability challenges when present in either dc or ac systems. This thesis presents CPL design techniques to mitigate these issues, as well as tools to determine in which applications CPL instabilities may occur. For stability analysis of a dc distribution system, an equivalent circuit model …
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Investigation and application of high-efficiency large-step-down power conversion architectures
In this thesis, we introduce two large-step-down dc-dc converter architectures that are designed to provide zero-voltage switching of the power devices. While the techniques used in these converters can be used in a wide range of applications, the operating voltage and power levels used in this …
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Efficiency and Reliability Analysis of AC and 380V DC Data Centers
… cost. Even a slight improvement in the power distribution system of a data center could save millions of dollars in electricity bills. Benchmarks for both AC and 380V DC data centers are developed and efficiency analyses thereof have been performed for an entire year. The efficiency of the …
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Enhanced Cal Poly SuPER System Simulink Model
… Resources (SuPER) project is a solar power DC distribution system designed to autonomously manage and supply the energy needs of a single family off-the-grid home. The following thesis describes the improvement and re-design of a MATLAB Simulink model for the Cal Poly SuPER system. This …
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Design and analysis of a permanent magnet generator for naval applications
… modules to connect the high-speed generator to a DC distribution system are designed and analyzed. In depth simulation of the eighty complete systems is performed using the software programs MATLAB (Version 12.0, Mathworks) and PSIM (Version 6.0, Powersim, Inc.).
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Design and evaluation of a reconfigurable stacked active Bridge dc/dc converter for efficient wide load-range operation
… and implementation of a step-down soft-switched dc-dc converter based on an active bridge topology which overcomes some of the limitations of the conventional dual-active bridge (DAB). The topology comprises a double-stacked bridge inverter, coupled to a recongurable rectifier through a special …
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Insulation-Constrained Design of Power Electronics Converters and DC Circuit Breakers
… (LV) and medium-voltage (MV) direct current (DC) distribution systems for a variety of applications. Power electronics converters and DC circuit breakers (DCCBs) are the key components of a DC system and are hence the focus of this work. The combination of growing power density requirements …
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High-Voltage-Gain DC-DC Power Electronic Converters -- New Topologies and Classification
… dissertation proposes two new high-voltage-gain dc-dc converters for integration of renewable energy sources in 380/400V dc distribution systems. The first high-voltage-gain converter is based on a modified Dickson charge pump voltage multiplier circuit. The second high-voltage-gain converter is …
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Two new families of high-gain DC-DC power electronic converters for DC-microgrids
<p>"Distributing the electric power in dc form is an appealing solution in many applications such as telecommunications, data centers, commercial buildings, and microgrids. A high gain dc-dc power electronic converter can be used to individually link low-voltage elements such as solar panels, fuel …
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System Level Black-Box Models for DC-DC Converters
… of this work is to develop a two-port black-box dc-dc converter modeling methodology for system level simulation and analysis. The models do not require any information about the components, structure, or control parameters of the converter. Instead, all the information needed to build the models …
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Online Identification, Monitoring, and Control of A Dc/Dc Converter System Using Digital Network Analyzer Techniques
… of applications including multi-converter power distribution systems. These systems are prone to interactions that can reduce stability and performance margins according to the so-called Middlebrook impedance criterion and its extensions. With some additional software, a converter's digital …
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High Performance Power Converter Systems for Nonlinear and Unbalanced Load/Source
… space vector modulation schemes have a better DC link voltage utilization and result in a low distortion. It is an effective solution to provide the neutral point for a three-phase four-wire system and to handle the neutral current due to unbalanced load or source and nonlinear loads. …
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A novel backup protection scheme for hybrid AC/DC power systems
… scheme designed to safeguard hybrid AC/DC distribution networks against DC faults that are not cleared by the main MVDC (Medium Voltage DC) link protection. The protection scheme relies on the apparent impedance measured at the AC "side" of the MVDC link to detect faults on the DC …
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A tool for reliability analysis of electrical power systems
… of the tool to the reliability analysis of a dc distribution system network is presented.
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