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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 26 for “"medium-voltage (MV)"”.
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On the Compensation of Medium Voltage Metrology via Alternative Methods
… technology have led to the development of medium-voltage (MV) SiC MOSFETs that feature fast switching speeds at high power levels. Significant efforts have been applied to characterizing these devices, but recent studies have revealed that currently available medium-voltage metrology is …
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A Comparative Analysis of Experimental and Computational Methods for Evaluating Partial Discharge Inception Voltage on Printed Circuit Boards
… presents a significant reliability concern in medium-voltage (MV) and high-voltage (HV) systems, particularly as power electronics applications continue to push to higher voltage levels. One aspect of MV/HV system design that has not received much treatment in the literature pertains to the …
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Hybrid Modular Multilevel Converter Family and Modular DC Circuit Breaker for Medium-voltage DC (MVDC) Applications
… and flexibility of power electronics-based voltage conversion techniques, DC grids, and distribution systems have gained significant interest. These systems offer advantages such as improved power quality, efficiency, and flexibility. Medium-voltage DC (MVDC) applications, including …
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Design of 1.7 kV SiC MOSFET Switching-Cells for Integrated Power Electronics Building Block (iPEBB)
… across the world. Specifically, the need for medium-voltage (MV) 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 …
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Nonlinear Polymer Nanocomposite for Field Grading in Medium-Voltage Power Converters under High-Altitude and Humid Environments
… coating designed to enhance insulation within medium-voltage (MV) power modules and suppress flashover on printed-circuit boards (PCBs) at high altitudes. Electric field simulations of the triple-point (TP) region revealed strong E-field intensification at conductor-ceramic-silicone and …
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Evaluation and Development of Medium-Voltage Converters Using 3.3 kV SiC MOSFETs for EV Charging Application
… Among the potential areas of advancement are medium-voltage (MV) and high-voltage (HV) applications, due to the growing demand for high-power-density and high-efficiency power electronics converters. These advancements have propelled a wide adoption of electric vehicles (EV), which in the …
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Lifetime predictions of medium voltage motor coil insulation when operated by PWM from SiC inverters.
… carbide (SiC) that are able to operate at higher voltages, switching frequencies, and efficiencies than traditional devices. These devices present a wonderful opportunity for all power inverters, but especially for medium voltage (MV) applications. However, these new WBG devices present new and …
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Reliability Evaluation of Large-Area Sintered Direct Bonded Aluminum Substrates for Medium-Voltage Power Modules
… techniques for prototyping and evaluation of medium voltage (MV) power module packages. Specific focus will be given to the utilization of silver sintering as a bonding method for high temperature, high density power modules. Nano-silver paste and preform will be examined in detail as enabling …
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Modular Photovoltaic (PV) Step-up Converter With A Coupled Power Balancing Scheme for DC-Distributed System
… energy conversion system typically consists of a medium voltage (MV) grid that collects power from individual PV arrays. In a MV Direct Current (DC) distributed grid architecture, since the output voltage of the PV array is significantly lower than the voltage level of medium voltage grid (such as …
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High-frequency Current-transformer Based Auxiliary Power Supply for SiC-based Medium Voltage Converter Systems
… gate drivers, sensors, controllers, etc. in medium voltage (MV) silicon carbide (SiC)-based converter systems. Such a converter requires APS to have high insulation capability, low common-mode coupling capacitance (Ccm ), and high-power density. Furthermore, considering the lifetime and …
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Switching-Cycle Control and Sensing Techniques for High-Density SiC-Based Modular Converters
… density has become an emerging need for the medium-voltage (MV) high-power converters in applications of power distribution systems in urban areas and transportation carriers like ship, airplane, and so forth. The limited footprint or space resource cost such immensely high price that …
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Insulation Design and Analysis for Medium-Voltage SiC-based Power Electronics Building Blocks
In this dissertation, a design approach for medium voltage (MV) PCB-based components, such as the dc bus, is detailed. Key considerations, including electric field (E-field) grading near power terminals and PCB edges, cable feedthroughs, and the integration of components, are explored from the …
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Creating additional network capacity on constrained medium voltage networks utilizing distributed generation (specifically PV technology)
Medium voltage (MV) networks are designed for forward power flow and they radially distribute power to various types of electrical loads. With electrical load growth driven by economic growth, aging networks have limited network capacity to supply the increase in load demand and non-technical …
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Design and Testing of a SiC-based Solid-State Bypass Switch for 1 kV Power Electronics Building Blocks
… demand, the need for efficient high-density medium-voltage (MV) power converters has increased to support flexible power distribution grids. The modular multilevel converters (MMC) became the most typical MV power converters in applications from 2010. This topology has many advantages, such …
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Electromagnetic Interference and Compatibility within SiC-based Medium Voltage Converters
… to their fast switching capability. Meanwhile, medium voltage (MV) high power converters have been pushed to higher power, higher voltage, and higher power density design requirements in recent years, which makes the EMI management even more difficult. Unlike converter-level noise emissions …
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High-Frequency Design Consideration and EMI Mitigation in SiC-based Multilevel Converters
Medium Voltage (MV) power conversion systems are essential in high power applications to address the increasing demand of energy and the increasing penetration of renewable energy sources. MV power electronics converters are the key elements for power conversion in MV systems and are the focus of …
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Control, Topology and Component Investigations for Power-Dense Modular Multilevel Converters
… themselves developed using fast-switching low-voltage (LV) semiconductors meaningfully combined with energy storage components like capacitors or batteries. MMCs are highly modular and scalable and have a very broad operation range, making them a key solution already used today for a wide range …
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Protection, Control, and Auxiliary Power of Medium-Voltage High-Frequency SiC Devices
… and higher power density. With higher blocking voltage available, WBG devices, especially the silicon carbide (SiC) metal-oxide-semiconductor field-effect transistor (MOSFET), have been widely explored in various medium-voltage (MV) applications in both industry and academia. However, due to the …
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Applying the Herman-Beta probabilistic method to MV feeders
The assessment of voltage drop in radial feeders is an important element in the process of network design and planning. This task is however not straight forward as the operation of modern power systems is highly influenced by a variety of uncertain and random variables such as stochasticity in …
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Insulation-Constrained Design of Power Electronics Converters and DC Circuit Breakers
… power converter technology have enabled new low-voltage (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 …
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