On the Implementation of a
Microgrid Project with Renewable
Distributed Generation
Vicente Leite
Polytechnic Institute of Bragança
Outline
• Motivation
• The IPB microgrid project:
– Conceptual Design
– Integrated systems
– Systems to be integrated
• On-going project for V2G and G2V integration:
– Power structure and control
– Simulation results
• Conclusions
Motivation
This small microgrid has been developed as a research platform
and also for demonstration purposes as part of a wider project
named VERCampus – Live Campus of Renewable Energies –
which integrates a set of technologies, infrastructures, and
initiatives carried out in the Campus of the Polytechnic Institute
of Bragança, regarding the renewable energies technologies and
distributed power generation systems promotion and
dissemination for students, stakeholders and all community in
general.
Photovoltaic systems
3 kW solar tracker (integrated with the laboratory)
Sensors (T, R, W)
and webbox for
remote monitoring
2 kW PV panel for microgrid / solar chargers (with
terminals available for different PV configurations)
9 PV modules FTS-220P with total power 2 kW,
VOC
=330,84V and ISC
=8,30A (at STC).
Energy storage components
Semi-automatic production
unit of biodiesel from used
cooking oil
5 kW Electric
generator
Bank of batteries
8×6V, 200A
ECO Buggy IPB
Motor:
Permanent Magnet;
13 kW; 64,87 V;
149,5 A; 6000 rpm;
20,7 Nm; 8 poles; 400 Hz.
Battery:
Lithium iron phosphate;
96 V, 70 Ah, 90 Kg.
Electric Vehicle
29 glass × 24 PV cells = 29 × 46 W = 1334 W
Glass facade of the library of the School
of Technology and Management
Photovoltaic glass facade
Power house Discharge basin
� Stand-Alone System (1 kW)
� Grid-Connected System (1 kW)
Two propeller turbines:
Irrigation canal Small intake weir End of canal
Discharge divisor
and spillway
Feeder
canals
Turbines
Pico hydro power plant
On-going project forV2G and G2V integration
Bi-directional converter topology
+
*
dcV
*
sI
*
si*
bI
*bV
+
Simulation Results
0 0.5 1 1.5 2 2.5 3 3.5 4
-20
-10
0
10
Time (s)
Bat
tery
cur
rent
(a)
0 0.5 1 1.5 2 2.5 3 3.5 499
99.5
100
100.5
101
Time (s)
Bat
tery
vol
tage
(V
)
IbIb-ref
G2V V2G
Simulation Results
0 0.5 1 1.5 2 2.5 3 3.5 4100
150
200
250
300
350
400
450
500
Time (s)
DC
Lin
k V
olta
ge (
V)
VdcVdc-ref
G2V V2G
1.8 1.85 1.9 1.95 2 2.05 2.1 2.15 2.2 2.25 2.3-400
-200
0
200
400
Time (s)
Gri
d vo
ltage
(V
)
VsVpll
1.8 1.85 1.9 1.95 2 2.05 2.1 2.15 2.2 2.25 2.3-20
-10
0
10
20
Time (s)
Gri
d cu
rren
t (A
)
IsIs-ref
Simulation Results
G2V V2G
Conclusions
• The IPB microgrid project is a laboratory development platform for
microgrids with renewable distributed generation and energy storage
elements;
• It is suitable for isolated (or not) and self-sustainable systems up to a rated
power of 5 kW (but can be expanded up to hundreds of kW);
• It has been developed as a research platform and also for demonstration
purposes, and is part of a wider project related to renewable energies
(vercampus.ipb.pt);
• In this context, a V2G and G2V project is being developed, which will
provide a second energy storage element using the battery of an electric
vehicle.
Thank you very much
Vicente LeitePolytechnic Institute of Bragança
School of Technology and Management
Campus de Santa Apolónia, Apartado 1134
5301-857 Bragança, Portugal