1. © ABB Group July 14, 2015 | Slide 1 Integrating offshore wind energy An engineering challenge Sebastian Stadler, Tobias Korn | ABB AG | Grid Systems | December 2011

2. © ABB AG July 14, 2015 | Slide 2 Challenges Load flow scenario Germany 2020 Source: Amprion Situation 2010Scenario 2020

3. © ABB AG July 14, 2015 | Slide 3 Challenges Offshore installations Europe Source: KPMG 2010

4. © ABB AG July 14, 2015 | Slide 4 Projects Offshore clusters North Sea BorWin SylWin HelWin DolWin ProjectFinishCompany BorWin12010ABB 400 MW BorWin22012Siemens 800 MW DolWin12013ABB 800 MW DolWin22015ABB 900 MW HelWin12013Siemens 576 MW HelWin22015Siemens 690 MW SylWin12014Siemens 864 MW Status: 2011

5. © ABB AG July 14, 2015 | Slide 5 Wish and reality Offshore wind farm projects North Sea Source: wind:research 2011 40% gap

6. © ABB AG July 14, 2015 | Slide 6 Transmission technology AC vs. DC

7. © ABB AG July 14, 2015 | Slide 7 HVDC projects and technology HVDC vs. HVAC But cost is not everything:  AC cable > 50 km needs reactive power compensation, which is technically absurd as far as offshore is concerned  Environmental impact: DC cable has no electrical field and has lower losses, which leads to a lower thermal impact

8. HVDC projects and technology Connecting SylWin wind farms with AC cables © ABB AG July 14, 2015 | Slide 8 Platform AC Cable

9. HVDC projects and technology Connecting SylWin wind farms with DC cables © ABB AG July 14, 2015 | Slide 9 Platform DC Cable AC Cable

10. © ABB AG July 14, 2015 | Slide 10 HVDC projects and technology HVDC Classic vs. Light HVDC Classic overhead lines HVDC Light VPE cable HVDC Classic/ HVDC Light MI cable HVDC Light overhead lines U dc in kV Power in MW 800 700 600 500 400 300 200 0 01000200030004000500060007000

11. © ABB AG July 14, 2015 | Slide 11 HVDC projects and technology HVDC light project DolWin1 by ABB

12. © ABB Group July 14, 2015 | Slide 12 HVDC projects and technology DC connections europe 2010 Offshore Wind HVDC connections

13. © ABB AG July 14, 2015 | Slide 13 HVDC projects and technology Realized projects 56 HVDC Classic projectssince 1954 14 HVDC Classic upgradessince 1991 14 HVDC Light projekte since 1997

14. © ABB Group July 14, 2015 | Slide 14 HVDC projects and technology DC connections europe 2020 Offshore Wind HVDC connections

15. © ABB AG July 14, 2015 | Slide 15 HVDC projects in China 2020 Guangdong Fujian Taiwan Sichuan & Chongqing Hubei Hunan Jiangxi Heilongjiang Inner Mongolia Hebei Henan Jiangsu Shandong Anhui Guangxi Guizhou Beijing Tianjin Shanghai Jilin Gansu Shaanxi Shanxi Qinghai Xinjiang Xizang Ningxia Liaoning Zhejiang Yunnan Hainan Nuozhadu-Guangdong 800kV, 5000-6000 MW, 2015 Bangkok NW-Sichuan (Baoji – Deyang) 3000 MW, 2011 BtB North - Central 1000 MW, 2012 BtB Shandong - East 1200 MW, 2011 Irkutsk (Russia) - Beijing 800kV, 6400 MW, 2015 BtB Northeast-North (Gaoling) 1500 MW, 2008 Goupitan - Guangdong 3000 MW, 2016 Russia Jinghong-Thailand 3000MW, 2013 Ningxia - Tianjing 3000 MW, 2010 NWPG NCPG NEPG CCPG ECPG North Shaanxi-Shandong 3000 MW, 2011 Yunnan - Guangdong 800kV, 5000 MW, 2009 SCPG Hulunbeir (Inner Mongolia) - Shenyang 3000 MW, 2010 Xianjiaba – Shanghai 800kV, 6400 MW, 2011 Xiluodu - Hanzhou 800kV, 6400 MW, 2015 Xiluodu - Hunan 800kV, 6400 MW, 2014 (The year means project in operation) Hami – C. China 800kV, 6400 MW, 2018 Humeng – Shandong Humeng - Tianjing 800kV, 6400 MW, 2016 Humeng - Liaoning 800kV, 6400 MW, 2018 Jinsha River II – East China 800kV, 6400 MW, 2016 Jinsha River II - Fujian 800kV, 6400 MW, 2018 Jinsha River II – East China 800kV, 6400 MW, 2019 Jingping – East China 800kV, 6400 MW, 2012 Lingbao BtB Expansion 750 MW, 2009 Gezhouba-Shanghai Expansion 3000 MW, 2011 BtB China-Russia (HeiHe) 800kV, 6400 MW, 2015 750 MW, 2008 FarEast (Russia) – NE China 3000 MW, 2010

16. © ABB Group July 14, 2015 | Slide 16 HVDC projects and technology DC connections europe 2030+ Water 200 GW Solar 700 GW 8000 km 2 90 x 90 km Offshore Wind 300 GW 25 000 km 2 5000 x 10 km Offshore Wind Water Solar HVDC connections

17. © ABB AG July 14, 2015 | Slide 17 Getting a feeling for dimensions Offshore is a big business

18. © ABB AG July 14, 2015 | Slide 18 Getting a feeling for dimensions Wind energy converter Height total:up to 190 m Blade length:up to 80 m Weight:up to 800 to Height total:up to 190 m Blade length:up to 80 m Weight:up to 800 to

19. © ABB AG July 14, 2015 | Slide 19 Getting a feeling for dimensions Sea cable installation  95 km of a 155 kV 3-phase cable  70 kg / m  6650 to in total  maximum load: 7000 to  95 km of a 155 kV 3-phase cable  70 kg / m  6650 to in total  maximum load: 7000 to

20. © ABB AG July 14, 2015 | Slide 20 Getting a feeling for dimensions DC platform BorWin1 Topside: Length:50 m Width:33,5 m Height:22 m Weight:3200 t Topside: Length:50 m Width:33,5 m Height:22 m Weight:3200 t Jacket: Height:62 m Weight:1800 t Jacket: Height:62 m Weight:1800 t

21. © ABB AG July 14, 2015 | Slide 21 Getting a feeling for dimensions Thialf crane Length:200 m Width:88 m Draught:max. 31 m Capacity:2 x 7100 to Length:200 m Width:88 m Draught:max. 31 m Capacity:2 x 7100 to

22. © ABB AG July 14, 2015 | Slide 22

23. © ABB AG July 14, 2015 | Slide 23 Wind energy converter Types of foundation used worldwide