S. Rivera
55 records found
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The Matrix Modular Multilevel Converter (M3C) is a promising solution for medium-to-high voltage AC/AC conversion, due to its small size by not requiring an intermediate DC-link and its reduced arms compared to a back-to-back scheme. This paper introduces an M3C based on Modular
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Hybrid microgrids are systems that enable the interconnection of AC and DC networks within a unified framework, optimizing the integration of energy storage systems and DC-based renewable energy sources with the protection schemes and AC loads, predominantly induction motors. In
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A Sensitivity Analysis for Power Profile Modeling
A Case Study of Dutch DC Railway Networks
DC energy hubs have emerged as suitable candidates to enhance the electrical infrastructure in a localized approach, allowing future expansion in the transportation sector despite the electricity grid congestion. However, a risk in designing such a hub is that the outcome of the
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Battery Energy Storage Systems (BESS) offer scalable energy storage solutions, especially valuable for remote, off-grid applications. However, traditional battery packs with fixed series-parallel configurations lack reconfigurability and are limited by the weakest cell, hindering
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This paper presents the design, implementation, and validation of an on-blade sensor system for remote vibration measurement for low-capacity wind turbines. The autonomous sensor system was deployed on three wind turbines, with one of them operating in harsh weather conditions in
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Magnetic windings, in general, and small drives, in particular, are typically associated with thin round copper wires. This group of small drives includes electrical machines for automotive applications, ranging from ancillary units to traction machines for both hybrid electric v
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This work introduces a reconfigurable topology for AC-link partial power converters (PPC), intended for use as high-frequency transformerless regulated DC-DC converters in fast charging stations for electric vehicles (EV). This new topology allows an AC-link PPC to be reconfigure
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Intelligent Control for Type I Partial Power Converters in EV Charging Systems
Twin-Delayed Deep Deterministic Policy Gradient Approach
In recent years, the electric vehicle (EV) industry has experienced significant advancements, simultaneously driving substantial progress in battery technology. The evolution of battery systems necessitates enhancements in charging infrastructure to attain elevated power levels d
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Modular multilevel series-parallel converters (MM-SPC) have become a suitable solution to provide higher operating voltages, fault tolerance operation, and reliability at a reduced cost, due to their ability to achieve a simpler internal voltage balance. Therefore, MMSPC is a pro
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Electric vehicle (EV) charging infrastructure will play a critical role in decarbonization during the next decades, energizing a large share of the transportation sector. This will further increase the enabling role of power electronics converters as an energy transition technolo
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Energy storage systems (ESSs) allow improving the stability and efficiency of the electrical grids with a high penetration of renewable energy sources. Moreover, the use of Hybrid ESSs (HESSs) enables storage solutions with both high-energy and high-power densities, by combining
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This paper proposes a new buck-boost flying-capacitor (FC) converter for the DC-DC stage of an Electric Vehicle (EV) fast charging station. The proposed converter is capable of delivering a wide output range of voltage to charge different battery configurations. The converter has
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Increasing the power rating of electric vehicles (EV) fast charging stations to reduce charging times is considered critical to accelerate the adoption of electric vehicles. Besides increasing the power, other drivers pushing the development of EV fast chargers include the improv
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DC-DC Converters for Bipolar Microgrid Voltage Balancing
A Comprehensive Review of Architectures and Topologies
DC microgrids initiated the change of a paradigm regarding the concept about electrical distribution networks, especially in the context of the distributed generation associated with renewable energies. However, this new reality opens a new area of research, in which several aspe
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The Hexagonal power converter has become a suitable solution to provide high-quality voltage waveforms while achieving decoupled control of three DC terminals as well. In this case, the internal voltage balance of the different storage units is the main concern for the correct op
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Hybrid Energy Storage Systems (HESSs) have gathered considerable interest due to their potential to achieve high energy and power density by integrating different storage technologies, such as batteries and capacitors, to name a few. Among the various topologies explored for HESS
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The MMC converter is the key topology for HVDC applications. In these systems, a major complexity is the number of modules and components required per phase to achieve nominal voltage and current levels for applications in transmission system. In this paper, the topology and cont
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Hybrid Energy Storage Systems (HESSs) are based on different storage elements such as batteries or ultra capacitors (UC), aiming to implement a system with high energy and power density. These HESSs using multi-modular power converters to incorporate in each power electronics mod
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Electromobility has been growing rapidly in recent years, as a result of green and sustainability policies that promote it, but its growth has been hampered by having less autonomy than combustion vehicles, not being able to directly replace them especially in heavy-duty electric
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This paper proposes a new transformerless partial power converter for the DC-DC stage of a Electric Vehicle (EV) fast charging station. Partial power converters (PPC) are very attractive for this purpose thanks to their high efficiency. Based on this concept, it is proposed a new
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