AEGEAN INTERCONNECTION PROJECT Athens, 24 th May, 2011
Mar 30, 2015
AEGEAN INTERCONNECTION PROJECT
Athens, 24th May, 2011
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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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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
Medium Voltage Grids
ROKAS Owned (Internal Grid)
(km)
PPC Owned (Connection Grid)
(km)Total Overhead Medium Voltage Grids 35,41 41,98Total Underground Medium Voltage Grids 62High Voltage GridsTotal Overhead High Voltage Grids 20
SubstationsROKAS Owned
(Number)PPC Owned
(Number)Total Substations 20/150 kV 3 2
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Iberdrola Renovables, a world leader…
Installed Capacity by 1st Quarter 2011:
2010 Generation:
12,834 MW
25,405 GWh
No 1 Wind-energy producer in the world
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IBERDROLA, the utility: managed assets (1)
916 substations, 19.591 km HV, 215.290 km M&LV lines
Production: 154.000 GWh / Distribution: 100.596 GWh
World leader in wind power, Spain’s leading energy group and one of the top 5 electric
companies in the world
Total installed capacity: 45.000 MW
(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 linksMax
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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• 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
Submarine Cable
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Key W/Fs CharacteristicsWind Turbine Generator (WTG) Characteristics
Type G80 / G87Capacity 2MWDiameter 80m (G80) / 87m (G87)No of Blades 3Blades Length 42,5m / 39mVoltage of WTG 690 AC VoltsTemperature Range -20 to +30 0C
Electrical Infrastructure per IslandNo of Converter
StationsNo of Substations
Lesvos 1 2Chios 1 2Limnos 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
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Connects three islands of national importance with the mainland
Connects three islands of national importance with the mainland
Geopolitical
Channeling energy into the islands, solving in a reliable way their power supply problems
Channeling energy into the islands, solving in a reliable way their power supply problems
Security of supply
Development of RES / reduction of energy dependency on imports / update of electrical infrastructure
Development of RES / reduction of energy dependency on imports / update of electrical infrastructure
Strategic
Reduced CO2 emissions / contribution in meeting EU
RES targets for 2020
Reduced CO2 emissions / contribution in meeting EU
RES targets for 2020 Environmental
Reduce the electricity bills for local residencesReduce the electricity bills for local residencesLocal acceptance
Reasons for the interconnection…
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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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Planning and Licensing – Conflict Subjects
Great depths and Long distances
Lying of submarine cablesTectonic faults and Earthquakes
Landing Points for each island interconnectedCrossing Evia Island for System interconnection
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Electrical System – Conflict Subjects
Black Start Possibility
Regulation of the active and reactive power
Calculation of the interconnection losses
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
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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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AEGEAN INTERCONNECTION PROJECT
Athens, 24th May, 2011
www.rokasgroup.gr
Thanks for your attention!
When you find your path, there’s no turning back. IBERDROLA.