AEGEAN INTERCONNECTION
PROJECT
Athens, 24th May, 2011
Index
1. The Company
2. The Aegean Project
3. Why the interconnection?
4. Interconnection and MSP: discussion subjects
5. Conclusion
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Rokas Group - Installed Wind and PV Farms
ROKASGROUP operates
and maintains 17 W/Fs of
total capacity 255,3 MW and
2 Photovoltaic Farms of total
capacity 2,2MW, distributed
all over Greece
Total installed capacity
257,5MW
ROKASGROUP employs
over 200 people
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Rokas Group – Installed Electrical Infrastructure
Medium & High Voltage Grids
ROKAS Owned
PPC Owned
(Internal Grid) (Connection Grid)
Medium Voltage Grids
(km)
(km)
35,41
41,98
Total Overhead Medium Voltage Grids
62
Total Underground Medium Voltage Grids
High Voltage Grids
20
Total Overhead High Voltage Grids
Total Substations 20/150 kV
Substations
ROKAS Owned
(Number)
3
PPC Owned
(Number)
2
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Iberdrola Renovables, a world leader…
Installed Capacity by 1st
Quarter 2011:
12,834 MW
2010 Generation:
25,405 GWh
No 1 Wind-energy producer in the world
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IBERDROLA, the utility: managed assets
(1)
Total installed capacity: 45.000 MW
World leader in wind power,
Spain’s leading energy group
and one of the top 5 electric
companies in the world
Production: 154.000 GWh /
Distribution: 100.596 GWh
916 substations, 19.591 km HV, 215.290 km M&LV lines
(1)
year end 2010
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Index
1. The Company
2. The Aegean Project
3. Why the interconnection?
4. Interconnection and MSP: discussion subjects
5. Conclusion
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The Aegean Project
• Interconnection of
Lesvos, Chios and
Limnos with mainland via
a 443 km long submarine
cable
• Installation of wind
capacity totaling 706MW
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The Interconnection
•
•
•
•
•
•
•
1High Voltage Direct Current circuit (Evia-Chios)
2 HV AC or DC circuits under investigation
Direct current rated voltage: 150-300 kV
706 MW capacity
Submarine cable total length: 443 km
4 converter stations DC/AC
Connection to Larimna (mainland) ultra HV centre
HVDC links
Max
Depth
(m)
Capacity
(MW)
Lesvos-Aliveri
550
706
Lesvos-Limnos
300
250
Chios-Lesvos
350
150
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Interconnection Scenario of Lesvos, Limnos, Chios with
the Interconnected System
• Interconnection of Lesvos-Evia via DC link
• Interconnection of Lesvos-Chios via AC or DC link
• Interconnection of Lesvos-Limnos via AC or DC link
Mainland
• Installation of an AC/DC converter station (C/S) close to Larimna 400kV substation
• Underground lines (HVDC) to connect Larimna S/S with Viotia and Evia East with Evia
West landing point
Islands
•
•
•
•
Installation of a AC/DC C/S on each island
218km HVDC submarine cable connection from Evia landing point to Lesvos
84km HVDC submarine cable connection from Lesvos to Chios
117km HVDC submarine cable connection from Lesvos to Limnos
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Point to Point vs. Multiterminal Interconnection
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Submarine Cable
• Cables are placed at a distance
of 20m from the sea shore in a
common trench of 2m depth
that is covered by 25cm of
concrete
• From there onwards and up to
a sea depth of 15m, cables are
placed in separate trenches of
2m depth
• From sea depth 15m, cables
are inserted in separate
trenches of 1m depth
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Key W/Fs Characteristics
Wind Turbine Generator (WTG) Characteristics
Type
G80 / G87
Capacity
2MW
Diameter
80m (G80) / 87m (G87)
No of Blades
3
Blades Length
42,5m / 39m
Voltage of WTG
690 AC Volts
-20 to +30 0C
Temperature Range
Electrical Infrastructure per Island
No of Converter
No of Substations
Stations
Lesvos
1
2
Chios
1
2
Limnos
1
2
MV of 20, 33 or 66 kV
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Index
1. The Company
2. The Aegean Project
3. Why the interconnection?
4. Interconnection and MSP: discussion subjects
5. Conclusion
14
Reasons for the interconnection…
Geopolitical
Connects three islands of national importance with the
mainland
Strategic
Development of RES / reduction of energy dependency
on imports / update of electrical infrastructure
Environmental
Reduced CO2 emissions / contribution in meeting EU
RES targets for 2020
Security of supply
Channeling energy into the islands, solving in a reliable
way their power supply problems
Local acceptance
Reduce the electricity bills for local residences
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Index
1. The Company
2. The Aegean Project
3. Why the interconnection?
4. Interconnection and MSP: discussion subjects
5. Conclusion
16
Planning and Licensing – Conflict Subjects
Landing Points for each island interconnected
Crossing Evia Island for System interconnection
Lying of submarine cables
Tectonic faults and Earthquakes
Great depths and Long distances
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Electrical System – Conflict Subjects
Calculation of the interconnection losses
Regulation of the active and reactive power
Black Start Possibility
N-1 and ways of fulfillment (loop connection)
• Interconnection of Larimna with Chios-Lesvos-Limnos- UHV
S/S Filippoi (or Nea Santa)
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Index
1. The Company
2. The Aegean Project
3. Why the interconnection?
4. Interconnection and MSP: discussion subjects
5. Conclusion
19
Conclusion
There are technical and planning problems. We can deal
with them and manage to solve them BUT the
CRUCIAL POINT
is the LOCAL ACCEPTANCE of this kind of projects
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When you find your path, there’s no turning back. IBERDROLA.
Thanks for your attention!
AEGEAN INTERCONNECTION
PROJECT
www.rokasgroup.gr
Athens, 24th May, 2011
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