photovoltaic recharging station for electrical vehicles
TRANSCRIPT
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Study and realization in the Electrical Engineering Department at I.U.T Béthune .
� a new teaching module in renewable energies
=> it consists in students’ projects in a laboratory.
� teaching development with practical projects
=> to increase the student’s autonomy
to motivate the student’s interest.
� it is composed of a group of students from differen t nationalities who worked together on a technical pr oject.
� it takes part in an international collaboration in renewable energies.
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The international collaborationTo organize common students’ projects in various cou ntries
International Collaboration in Engineering Educ ationI.C.E.Ecountries involved
Béthune, Fr Altoona, USA Budapest, HuDublin, Ir Warsaw, Po Cluj Napoca, RoMarrakech, Mo Zaragoza, Sp Baia Mare, Ro
The subject is Electrical systems to manage renewable energies.
The web site: www.univ-artois.fr/icee
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The technical applications
The project conducted at I.U.T Bethune
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The recharging station
charge
regulator
transfer converter
power part
control part
photovoltaic panels
station batteries24V 200Ah
electrical vehicle being recharged
48V 55Ah
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The overall project
µC
solar panels
Zig bee
autonomous recharging station
energystorage
chargeconverter
chargeregulator
supervision base
Zig bee
PC
web pages
Zig beeµC
electrical vehicle
energystorage
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Station scheme
stationbatteries
solarpanels
chargeregulator
electrical vehicle batteries
TXPIC
istiev
vst vev
D
Q
microcontroller
Boostchopper
filter
L isto
C
vQ
zigbee
48 panels Vst = 24V f = 15 kHz L = 11 µH Vev = 48 VFEE 14-12 200 Ah IGBT 50A 1200V C = 1000 µF 55 Ah12V 12W control through a µC PIC 16F877
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Functioning of the converter
Q
Dist isto
vst vevVQ
L
First state: the transistor is conducting from t = 0 till α.T
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Second state: at t = α.T , the control part opens the transistor till T
Q
Dist isto
vst vevVQ
L
Functioning of the converter
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The experimental converter
input24V
coilpack IGBT + diode
control part with PIC µC
current sensor
voltage sensor
output 48V
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The tests
control signal of the IGBT
10V/div
input current ist
10A/div
T = 66 µsf = 1/T = 15 kHz
α.T
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diode current isto10A/div
The tests
control signal of the IGBT
10V/div
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output current i ev
10A/div
average value of the output current = 8A
0
The tests
control signal of the IGBT
10V/div
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Implementation of the wireless communicationImplementation of the wireless communication�Communication between the vehicle, the recharging s tation and the supervision base.
�We use ZigBee modules to transmit numerical data thr ough WiFi network. (standard IEEE 802.15.4, 2.4 GHz, 20-250 Kb/s, 100- 1600 m).
�We use microcontroller to measure the parameters (v oltages, curr ents...) analog to digital conversion and then transmission through a serial link to the ZigBee module.
�Web pages with graphical presentation (Java Applets ). Drawing of the different measures, and control of the functioning of the recharging station.
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Example of distant measuresExample of distant measures� Real time drawing of the vehicle parameters.
� An emitter on the vehicle, a receiver connected to a computer.
� The data are received through Matlab for later calcu lations.
the motor current
the speed of the vehicle
the ZigBee module on the vehicle
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The group of students and their tutors
Tomazs KlodaVarsovie, Po
Dan DragosResita, Ro
Fatima DladouMohammedia, Mo
Hamza MajbarMohammedia, Mo
François MaeghtPatrick Favier
Pierre Yves Cresson
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in conclusionThe innovations are two fold
�� from the technical point of view:
This solution allows using photovoltaic energy to ch arge an electrical vehicle from a large field of solar panels.
The slow charge or the fast charge are made possible o n this system because of the high capacity batteries compos ing the recharging station.
This system is autonomous and interactive.
This application contributes to environmental sustain ability
This project is a prototype as a starting test.
⇒ It means opportunity for
technology transfer University ���� Companies
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���� From the educational point of view:
This allowed implementing meetings, studies, … in t he same place for foreign students originating from different countries an d from different educational systems.
The topic of renewable energies is most attractive fo r the students
=> It defines a new modern aspect for the Electrical Engineering.
This application concerns a lot of subjects in Elect rical Engineering
This group of working people has been integrated into an international collaboration.
in conclusion