1. AEGEAN INTERCONNECTION PROJECT Athens, 24 th May, 2011

2. 2 Index 1.The Company 2.The Aegean Project 3.Why the interconnection? 4.Interconnection and MSP: discussion subjects 5.Conclusion

3. 3 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

4. 4 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 35,4141,98 Total Underground Medium Voltage Grids 62 High Voltage Grids Total Overhead High Voltage Grids 20 Substations ROKAS Owned (Number) PPC Owned (Number) Total Substations 20/150 kV32

5. 5 Iberdrola Renovables, a world leader… Installed Capacity by 1 st Quarter 2011: 2010 Generation: 12,834 MW 25,405 GWh No 1 Wind-energy producer in the world

6. 6 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, Spains leading energy group and one of the top 5 electric companies in the world Total installed capacity: 45.000 MW (1) year end 2010

7. 7 Index 1.The Company 2.The Aegean Project 3.Why the interconnection? 4.Interconnection and MSP: discussion subjects 5.Conclusion

8. 8 The Aegean Project Interconnection of Lesvos, Chios and Limnos with mainland via a 443 km long submarine cable Installation of wind capacity totaling 706MW

9. 9 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-Aliveri550706 Lesvos-Limnos300250 Chios-Lesvos350150

10. 10 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

11. 11 Point to Point vs. Multiterminal Interconnection

12. 12 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

13. 13 Key W/Fs Characteristics Electrical Infrastructure per Island No of Converter Stations No of Substations Lesvos12 Chios12 Limnos12 MV of 20, 33 or 66 kV

14. 14 Index 1.The Company 2.The Aegean Project 3.Why the interconnection? 4.Interconnection and MSP: discussion subjects 5.Conclusion

15. 15 Connects three islands of national importance with the mainland Geopolitical 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 Strategic Reduced CO 2 emissions / contribution in meeting EU RES targets for 2020 Environmental Reduce the electricity bills for local residences Local acceptance Reasons for the interconnection…

16. 16 Index 1.The Company 2.The Aegean Project 3.Why the interconnection? 4.Interconnection and MSP: discussion subjects 5.Conclusion

17. 17 Planning and Licensing – Conflict Subjects Great depths and Long distances Lying of submarine cables Tectonic faults and Earthquakes Landing Points for each island interconnected Crossing Evia Island for System interconnection

18. 18 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)

19. 19 Index 1.The Company 2.The Aegean Project 3.Why the interconnection? 4.Interconnection and MSP: discussion subjects 5.Conclusion

20. 20 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 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

21. 21 AEGEAN INTERCONNECTION PROJECT Athens, 24 th May, 2011 www.rokasgroup.gr Thanks for your attention! When you find your path, theres no turning back. IBERDROLA.