24 research outputs found
iV2G charging platform
This paper describes an intelligent Vehicle to Grid
(iV2G) Charging Platform for plug-in hybrid and electric
vehicles that can be used at user’s home, and which includes a
mobile control system. The car drivers can control remotely the
charging or discharging process through a mobile
communication device. This mobile communication device can
also gather information about charging places, their
availability and the best road paths to reach them, as well as
energy market prices, informing the best periods to charge the
car regarding the energy costs.Fundação para a Ciência e a Tecnologia (FCT
A case study on the conversion of an internal combustion engine vehicle into an electric vehicle
This paper presents the conversion process of a
traditional Internal Combustion Engine vehicle into an Electric
Vehicle. The main constitutive elements of the Electric Vehicle
are presented. The developed powertrain uses a three-phase
inverter with Field Oriented Control and space vector
modulation. The developed on-board batteries charging system
can operate in Grid-to-Vehicle and Vehicle-to-Grid modes. The
implemented prototypes were tested, and experimental results
are presented. The assembly of these prototypes in the vehicle
was made in accordance with the Portuguese legislation about
vehicles conversion, and the main adopted solutions are
presented.FCT – Fundação para a Ciência e Tecnologia in the scope of the project: PEst - OE/EEI/UI0319/201
Model predictive control of an on-board fast battery charger for electric mobility applications
Under the necessities of reducing emissions and air pollution, and also for increasing fuel economy, automotive companies have been developing electric and plug-in hybrid electric vehicles. Since these vehicles are parked when the batteries are being charged, it is possible to use the traction power converter as on-board charger, also allowing to reduce weight, volume and costs of components in the vehicle. In this context, this paper presents a model predictive control algorithm for an on-board fast battery charging that uses the traction power converter of an electric vehicle. Simulation results and system implementation are depicted, and finally, are presented some experimental results obtained with the proposed control system.(undefined)info:eu-repo/semantics/publishedVersio
Conversion of an internal combustion engine vehicle into an electric vehicle
In this paper is described the conversion of an Internal Combustion Engine (ICE) vehicle into and Electric Vehicle (EV). The main steps of this conversion are briefly described, especially the standards to legalize EVs in Portugal, and the EV elements, mainly, the electric motor and its respective controller, and the batteries with the charging system. This paper also presents the modifications performed in the vehicle that was transform it in an EV, and that are specific of the vehicle used, mainly the adaptations to assemble the electric motor in the vehicle, and the disposition of the batteries’ bank on the vehicle.FEDER Funds - Operational Programme for Competitiveness Factors (COMPETE)Fundação para a Ciência e a Tecnologia (FCT) - PTDC/EEA-EEL/104569/2008, MIT-PT/EDAM-SMS/0030/2008
Assessment of a battery charger for electric vehicles with reactive power control
Batteries of Electric Vehicles (EVs) and Plug-in
Hybrid Electric Vehicles (PHEVs) have a large potential not
only to provide energy for the locomotion of these vehicles, but
also to interact, in dynamic way, with the power grid. Thereby,
through the energy stored in the batteries, these vehicles can be
used to regulate the active and the reactive power, as local
Energy Storage Systems. This way, EVs can contribute to help
the power grid to regulate the active and reactive power flow in
order to stabilize the production and consumption of energy.
For this propose should be defined usage profiles, controlled by
a collaborative broker, taking into account the requirements of
the power grid and the conveniences of the vehicle user. Besides,
the interface between the power grid and the EVs, instead of
using typical power converters that only work on unidirectional
mode, need to use bidirectional power converters to charge the
batteries (G2V - Grid-to-Vehicle mode) and to deliver part of
the stored energy in the batteries back to the power grid (V2G -
Vehicle-to-Grid mode). With the bidirectional power converter
topology presented in this paper, the consumed current is
sinusoidal and it is possible to regulate the power factor to
control the reactive power, aiming to contribute to mitigate
power quality problems in the power grid. To assess the
behavior of the presented bidirectional power converter under
different scenarios, are presented some computer simulations
and experimental results obtained with a prototype that was
developed to be integrated in an Electric Vehicle.Fundação para a Ciência e a Tecnologia (FCT) - FCOMP-01-0124-FEDER-022674, PTDC/EEAEEL/
104569/2008, MIT-PT/EDAM-SMS/0030/2008.FEDER Funds, through the
Operational Programme for Competitiveness Factors (COMPETE
Comparison of charging systems for electric vehicles and their impact on electrical grid
This paper presents a comparison of four types of
on-board batteries charging systems for Electric Vehicles (EVs)
and Plug-in Hybrid Electric Vehicles (PHEVs), and their impact
on the power quality of the electrical power grid. In the
comparison are analyzed the features, the characteristics and the
operation of each charging system, aiming their controllability
and their impact on the electrical grid, mainly considering the
Total Harmonic Distortion (THD) of the consumed current and
the power factor. Besides the normal mode of operation to charge
the batteries, denominated Grid-to-Vehicle (G2V), in this paper
is also discussed the possibility of operation as Vehicle-to-Grid
(V2G), in which the batteries of the Electric Vehicle return part
of the stored energy back to the electrical grid. The operation of
the batteries charging systems for EVs is shown through
simulations and experimental results.FEDER Funds - Operational Programme for Competitiveness Factors (COMPETE)Fundação para a Ciência e a Tecnologia (FCT) - PTDC/EEA-EEL/104569/2008, MITPT/EDAM-SMS/0030/200
Experimental comparison of single-phase active rectifiers for EV battery chargers
An experimental comparison of single-phase active rectifiers for electric vehicle (EV) battery chargers is
presented and discussed. Active rectifiers are used in on-board EV battery chargers as front-end converters
to interface the power grid aiming to preserve the power quality. In this paper, four topologies of active
rectifiers are compared: traditional power-factor-correction; symmetrical bridgeless; asymmetrical
bridgeless; and full-bridge full-controlled. Such comparison is established in terms of the requirements for
the hardware structure, the complexity of the digital control system, and the power quality issues, mainly the
grid current total harmonic distortion and the power factor. Along the paper these comparisons are presented
and verified through experimental results. A reconfigurable laboratorial prototype of an on-board EV
battery charger connected to the power grid was used to obtain the experimental results.This work has been supported by COMPETE: POCI-01-0145-FEDER-007043 and FCT – Fundação para a Ciência e Tecnologia within the Project Scope: UID/CEC/00319/2013. This work is financed by the ERDF – European Regional Development Fund through the Operational Programme for Competitiveness and Internationalisation - COMPETE 2020 Programme, and by National Funds through the Portuguese funding agency, FCT - Fundação para a Ciência e a Tecnologia, within project SAICTPAC/0004/2015- POCI- 01-0145-FEDER-016434.info:eu-repo/semantics/publishedVersio
Smart charging system of the electric vehicle CEPIUM
In this paper is presented the development of a smart
batteries charging system for the Electric Vehicle (EV) CEPIUM,
aiming the integration of EVs in the future Smart Grids. The
main features of the developed charging system are the
mitigation of the power quality degradation and the bidirectional
operation, as Grid-to-Vehicle (G2V) and as Vehicle-to-Grid
(V2G). The batteries charging process is controlled by an
appropriate control algorithm, aiming to preserve the batteries
lifespan. During the charging process (G2V), the consumed
current is sinusoidal and the power factor is unitary. Along the
discharging process (V2G), when the equipment allows delivering
back to the electrical power grid part of the energy stored in the
batteries, the current is also sinusoidal.FEDER Funds - Operational Programme for Competitiveness Factors (COMPETE)Fundação para a Ciência e a Tecnologia (FCT) - PTDC/EEA-EEL/104569/2008, MITPT/
EDAM-SMS/0030/2008
OpenADR: intelligent electrical energy consumption towards Internet-of-Things
With the growing of intermittent renewable energy sources, like wind and solar, are required energy backup solutions to establish an advantageous compromise between the energy production and consumption. Typically, these renewable energy sources are not installed at the end-users level, which can cre-ate the problem of uncontrolled distributed energy sources. In this research work we propose a solution based on the standard OpenADR to handle this problem, creating a platform based on internet-of-things capable to turn-on or off electrical devices based on a central decision process that meets the requirements of energy producers and consumers. Producers can provide energy according to the con-sumer’s requirements and take part of energy production and costs fluctuations. Based on an OpenADR standard for energy data exchange and a central cloud server, a list of services are provided to handle this transactions, with georefer-enced information to minimize energy losses in the distribution process.(undefined
Model predictive control of an on-board fast battery charger for electric mobility applications
Under the necessities of reducing emissions and air pollution, and also for increasing fuel economy, automotive companies have been developing electric and plug-in hybrid electric vehicles. Since these vehicles are parked when the batteries are being charged, it is possible to use the traction power converter as on-board charger, also allowing to reduce weight, volume and costs of components in the vehicle. In this context, this paper presents a model predictive control algorithm for an on-board fast battery charging that uses the traction power converter of an electric vehicle. Simulation results and system implementation are depicted, and finally, are presented some experimental results obtained with the proposed control system.(undefined)info:eu-repo/semantics/publishedVersio