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 15 of 15 for “"Magnetic energy storage"”.
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Magnet design considerations for superconductive magnetic energy storage
Superconducting Magnetic Energy Storage (SMES) offers many advantages over conventional forms of energy storage. The higher unit costs of SMES make it economically feasible only for large-scale applications (5000 MWh or more). Early studies showed that low aspect ratio solenoids have the lowest …
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Applications of superconducting magnetic energy storage systems in power systems
A Superconducting Magnetic Energy Storage (SMES) system is a very efficient storage device capable of storing large amounts of energy. The primary applications it has been considered till now are load-leveling and system stabilization.This thesis explores new applications/benefits of SMES in power …
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Superconducting magnetic energy storage for power system stability and quality enhancement
… Concerns over climate change are now moving the energy sector into a new era of modern power grids. To sustain the reliable operation of power systems and improve the quality of power generation, several instability issues that affect the quality of the operation of power systems are addressed in …
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Integrated cryogenic refrigeration system design for superconducting magnetic energy storage systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Impacts of superconducting magnetic energy storage unit on power system stability
… investigates the impacts of superconducting magnetic energy storage (SMES) unit on the power system first-swing stability by the impedance model of the SMES unit and EMTP simulations. The impedance model of the SMES unit is established in this thesis for study purpose. It has been concluded …
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Analysis of the Power Conditioning System for a Superconducting Magnetic Energy Storage Unit
Superconducting Magnetic Energy Storage (SMES) has branched out from its application origins of load leveling, in the early 1970s, to include power quality for utility, industrial, commercial and military applications. It has also shown promise as a power supply for pulsed loads such as electric …
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A Power Conditioning System for Superconductive Magnetic Energy Storage based on Multi-Level Voltage Source Converter
… conditioning system (PCS) for superconductive magnetic energy storage (SMES) is developed and its prototype test system is built and tested. The PCS uses IGBTs for high-speed PWM operation and has a multi-level chopper-VSC structure. The prototype test system has three-level that can handle up …
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Energy storage in reconfigurable antennas
… antennas is often strongly influenced by energy storage effects. Many antenna types achieve their performance characteristics through a careful balance of electric and magnetic energy storage. The distinct effects of magnetic and electric energy storage convey important information about …
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Control and operation of SMES and SMES/PV systems
… control schemes are examined for superconductive magnetic energy storage (SMES) systems. Diurnal load leveling for electric utilities and compensation for fluctuations in photovoltaic (PV) power generation are the primary applications discussed. It is demonstrated that a SMES system implemented …
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Experimental investigation of semiconductor losses in cryogenic DC-DC converters
… applications, for example superconducting magnetic energy storage, superconducting fault current limiters, and superconducting rotary machines for marine propulsion, it is timely to consider the possibility of integrating the associated control equipment into the cryostat with the …
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Design of miniaturized radio-frequency DC-DC power converters
… We present a VHF topology where most of the magnetic energy storage is accomplished in a transformer that forms an essential part of the resonant network. The reduced component count aids in manufacturability and size, but places difficult requirements on the transformer design. An algorithm …
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Closed Loop Control for a Piezoelectric-Resonator-Based DC-DC Power Converter
… Power electronics traditionally rely on magnetics for energy storage, but magnetics are fundamentally less efficient and power dense when scaled to small sizes. Piezoelectric resonators (PRs), which store energy in mechanical inertia and compliance, are promising alternatives to magnetic …
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Second-generation high-temperature superconducting coils and their applications for energy storage
… and can therefore save a large amount of energy dissipated, it is a 'green' material by saving energy loss and hence reducing carbon emissions. Recently the massive manufacture of high-temperature superconducting (HTS) materials has enabled superconductivity to become a preferred candidate …
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Space Vector Modulation and Control of Multilevel Converters
… a power conditioning system for Superconductive Magnetic Energy Storage System. The dominant challenge of this research was to develop the power conditioning system that can match slowly varying dc voltage and dc current on the super conductive magnet side with the ac voltages and ac currents on …
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Electromagnetic Transient and Dynamic Modeling and Simulation of a StatCom-SMES Compensator in Power Systems
Electromagnetic transient and dynamic modeling and simulation studies are presented for a StatCom-SMES compensator in power systems. The transient study aims to better understand the transient process and interaction between a high power/high voltage SMES coil and its power electronics interface, …