The Experts below are selected from a list of 599895 Experts worldwide ranked by ideXlab platform

A Flammini - One of the best experts on this subject based on the ideXlab platform.

  • on the mobile communication requirements for the demand side management of electric vehicles
    Energies, 2018
    Co-Authors: Stefano Rinaldi, Marco Pasetti, E Sisinni, Federico Bonafini, P Ferrari, Mattia Rizzi, A Flammini
    Abstract:

    The rising concerns about global warming and environmental pollution are increasingly pushing towards the replacement of road vehicles powered by Internal Combustion Engines (ICEs). Electric Vehicles (EVs) are generally Considered the best candidates for this transition, however, existing power grids and EV management systems are not yet ready for a large penetration of EVs, and the current opinion of the scientific community is that further research must be done in this field. The so-called Vehicle-to-Grid (V2G) concept plays a relevant role in this scenario by providing the communication capabilities required by advanced control and Demand-Side Management (DSM) strategies. Following this research trend, in this paper the communication requirements for the DSM of EVs in urban environments are discussed, by focusing on the mobile communication among EVs and smart grids. A specific system architecture for the DSM of EVs moving inside urban areas is proposed and discussed in terms of the required data throughput. In addition, the use of a Low-Power Wide-Area Network (LPWAN) solution—the Long-Range Wide Area Network (LoRaWAN) technology—is proposed as a possible alternative to cellular-like solutions, by testing an experimental communication infrastructure in a real environment. The results show that the proposed LPWAN technology is capable to handle an adequate amount of information for the Considered Application, and that one LoRa base station is able to serve up to 438 EVs per cell, and 1408 EV charging points.

  • on the mobile communication requirements for the demand side management of electric vehicles
    Energies, 2018
    Co-Authors: Stefano Rinaldi, Marco Pasetti, E Sisinni, Federico Bonafini, P Ferrari, Mattia Rizzi, A Flammini
    Abstract:

    The rising concerns about global warming and environmental pollution are increasingly pushing towards the replacement of road vehicles powered by Internal Combustion Engines (ICEs). Electric Vehicles (EVs) are generally Considered the best candidates for this transition, however, existing power grids and EV management systems are not yet ready for a large penetration of EVs, and the current opinion of the scientific community is that further research must be done in this field. The so-called Vehicle-to-Grid (V2G) concept plays a relevant role in this scenario by providing the communication capabilities required by advanced control and Demand-Side Management (DSM) strategies. Following this research trend, in this paper the communication requirements for the DSM of EVs in urban environments are discussed, by focusing on the mobile communication among EVs and smart grids. A specific system architecture for the DSM of EVs moving inside urban areas is proposed and discussed in terms of the required data throughput. In addition, the use of a Low-Power Wide-Area Network (LPWAN) solution—the Long-Range Wide Area Network (LoRaWAN) technology—is proposed as a possible alternative to cellular-like solutions, by testing an experimental communication infrastructure in a real environment. The results show that the proposed LPWAN technology is capable to handle an adequate amount of information for the Considered Application, and that one LoRa base station is able to serve up to 438 EVs per cell, and 1408 EV charging points.

Contrepois Alexandre - One of the best experts on this subject based on the ideXlab platform.

  • Katium-power-converter-based Li-ion battery charger for railway Applications: control-oriented modelling
    HAL CCSD, 2021
    Co-Authors: Bratcu, Antoneta Iuliana, Ihuel François, Contrepois Alexandre
    Abstract:

    International audienceThis paper aims at obtaining a suitable model of a Katium-power-converter-based battery charger, to further serve for control design purpose for railway Applications. The Katium converter represents a particular DC-DC power converter topology. In the Considered Application a Katium converter operates as a Li-ion battery charger and a low-voltage power supply for a load composed of a resistive part and a constant-power part. Starting from the bilinear nature of the system model, a family of linear parameter-varying models is obtained by linearization around successive operating points, which mainly depend on the load power to be supplied. The modeling approach further relies upon the observation that the battery current regulation problem is a disturbance-rejection problem, where both constant and periodic disturbances act on the system. The obtained state-space model is validated by MATLAB®/Simulink® numerical simulation, providing a sound starting point for control strategy design

  • Two-level state-space-based control strategy of Katium-power-converter-based Li-ion battery charger for railway Applications
    HAL CCSD, 2021
    Co-Authors: Bratcu, Antoneta Iuliana, Ihuel François, Contrepois Alexandre
    Abstract:

    International audienceThis paper proposes a two-level cascaded control strategy for a DC-DC-Katium-power-converter-based battery charger for railway Applications. The Katium converter represents a particular DC-DC power converter topology, which is employed in the Considered Application as a Li-ion battery charger and a low-voltage power supply for a load composed of a resistive part and a constant-power part. The system model has a bilinear nature. A control-oriented modelling leads to obtaining a family of linear parameter-varying models by linearization around successive operating points, which mainly depend on the load power to be supplied. The battery current regulation is a disturbance-rejection problem, involving both constant and periodic (sinusoidal) disturbances. This problem is here solved by means of a two-level cascaded control structure whose lower level relies upon a pole-placement-based control on the previously derived state-space linear parameter-varying model, enriched with both usual integrators – for constant disturbance rejection – and resonant integrators, ensuring sinusoidal disturbance rejection. MATLAB®/Simulink® is chosen as software environment for numerical simulation closed-loop validation

Philippe Refait - One of the best experts on this subject based on the ideXlab platform.

  • formation of iron sulfides on carbon steel in a specific cement grout designed for radioactive waste repository and associated corrosion mechanisms
    Materials, 2021
    Co-Authors: Mathieu Robineau, Valerie Deydier, Didier Crusset, Alexandre Bellefleur, Delphine Neff, Enrique Vega, R Sabot, Marc Jeannin, Philippe Refait
    Abstract:

    Carbon steel coupons were buried in a specific low-pH cement grout designed for radioactive waste disposal and left 6 months in anoxic conditions at 80 °C. The corrosion product layers were analyzed by µ-Raman spectroscopy, XRD, and SEM. They proved to be mainly composed of iron sulfides, with magnetite as a minor phase, mixed with components of the grout. Average corrosion rates were estimated by weight loss measurements between 3 and 6 µm yr−1. Corrosion profiles revealed local degradations with a depth up to 10 µm. It is assumed that the heterogeneity of the corrosion product layer, mainly composed of conductive compounds (FeS, Fe3S4, and Fe3O4), promotes the persistence of corrosion cells that may lead to locally aggravated degradations of the metal. New cement grouts, characterized by a slightly higher pH and a lower sulfide concentration, should then be designed for the Considered Application.

Stefano Rinaldi - One of the best experts on this subject based on the ideXlab platform.

  • on the mobile communication requirements for the demand side management of electric vehicles
    Energies, 2018
    Co-Authors: Stefano Rinaldi, Marco Pasetti, E Sisinni, Federico Bonafini, P Ferrari, Mattia Rizzi, A Flammini
    Abstract:

    The rising concerns about global warming and environmental pollution are increasingly pushing towards the replacement of road vehicles powered by Internal Combustion Engines (ICEs). Electric Vehicles (EVs) are generally Considered the best candidates for this transition, however, existing power grids and EV management systems are not yet ready for a large penetration of EVs, and the current opinion of the scientific community is that further research must be done in this field. The so-called Vehicle-to-Grid (V2G) concept plays a relevant role in this scenario by providing the communication capabilities required by advanced control and Demand-Side Management (DSM) strategies. Following this research trend, in this paper the communication requirements for the DSM of EVs in urban environments are discussed, by focusing on the mobile communication among EVs and smart grids. A specific system architecture for the DSM of EVs moving inside urban areas is proposed and discussed in terms of the required data throughput. In addition, the use of a Low-Power Wide-Area Network (LPWAN) solution—the Long-Range Wide Area Network (LoRaWAN) technology—is proposed as a possible alternative to cellular-like solutions, by testing an experimental communication infrastructure in a real environment. The results show that the proposed LPWAN technology is capable to handle an adequate amount of information for the Considered Application, and that one LoRa base station is able to serve up to 438 EVs per cell, and 1408 EV charging points.

  • on the mobile communication requirements for the demand side management of electric vehicles
    Energies, 2018
    Co-Authors: Stefano Rinaldi, Marco Pasetti, E Sisinni, Federico Bonafini, P Ferrari, Mattia Rizzi, A Flammini
    Abstract:

    The rising concerns about global warming and environmental pollution are increasingly pushing towards the replacement of road vehicles powered by Internal Combustion Engines (ICEs). Electric Vehicles (EVs) are generally Considered the best candidates for this transition, however, existing power grids and EV management systems are not yet ready for a large penetration of EVs, and the current opinion of the scientific community is that further research must be done in this field. The so-called Vehicle-to-Grid (V2G) concept plays a relevant role in this scenario by providing the communication capabilities required by advanced control and Demand-Side Management (DSM) strategies. Following this research trend, in this paper the communication requirements for the DSM of EVs in urban environments are discussed, by focusing on the mobile communication among EVs and smart grids. A specific system architecture for the DSM of EVs moving inside urban areas is proposed and discussed in terms of the required data throughput. In addition, the use of a Low-Power Wide-Area Network (LPWAN) solution—the Long-Range Wide Area Network (LoRaWAN) technology—is proposed as a possible alternative to cellular-like solutions, by testing an experimental communication infrastructure in a real environment. The results show that the proposed LPWAN technology is capable to handle an adequate amount of information for the Considered Application, and that one LoRa base station is able to serve up to 438 EVs per cell, and 1408 EV charging points.

Bratcu, Antoneta Iuliana - One of the best experts on this subject based on the ideXlab platform.

  • Katium-power-converter-based Li-ion battery charger for railway Applications: control-oriented modelling
    HAL CCSD, 2021
    Co-Authors: Bratcu, Antoneta Iuliana, Ihuel François, Contrepois Alexandre
    Abstract:

    International audienceThis paper aims at obtaining a suitable model of a Katium-power-converter-based battery charger, to further serve for control design purpose for railway Applications. The Katium converter represents a particular DC-DC power converter topology. In the Considered Application a Katium converter operates as a Li-ion battery charger and a low-voltage power supply for a load composed of a resistive part and a constant-power part. Starting from the bilinear nature of the system model, a family of linear parameter-varying models is obtained by linearization around successive operating points, which mainly depend on the load power to be supplied. The modeling approach further relies upon the observation that the battery current regulation problem is a disturbance-rejection problem, where both constant and periodic disturbances act on the system. The obtained state-space model is validated by MATLAB®/Simulink® numerical simulation, providing a sound starting point for control strategy design

  • Two-level state-space-based control strategy of Katium-power-converter-based Li-ion battery charger for railway Applications
    HAL CCSD, 2021
    Co-Authors: Bratcu, Antoneta Iuliana, Ihuel François, Contrepois Alexandre
    Abstract:

    International audienceThis paper proposes a two-level cascaded control strategy for a DC-DC-Katium-power-converter-based battery charger for railway Applications. The Katium converter represents a particular DC-DC power converter topology, which is employed in the Considered Application as a Li-ion battery charger and a low-voltage power supply for a load composed of a resistive part and a constant-power part. The system model has a bilinear nature. A control-oriented modelling leads to obtaining a family of linear parameter-varying models by linearization around successive operating points, which mainly depend on the load power to be supplied. The battery current regulation is a disturbance-rejection problem, involving both constant and periodic (sinusoidal) disturbances. This problem is here solved by means of a two-level cascaded control structure whose lower level relies upon a pole-placement-based control on the previously derived state-space linear parameter-varying model, enriched with both usual integrators – for constant disturbance rejection – and resonant integrators, ensuring sinusoidal disturbance rejection. MATLAB®/Simulink® is chosen as software environment for numerical simulation closed-loop validation