DolWin1 - 800 MW HVDC Light transmission Grid connection of several offshore wind farms Oslo Copenhagen DolWin Alpha Hamburg Dörpen West The DolWin1 platform will be similar to the existing BorWin alpha The 800 MW DolWin1 HVDC Light® transmission system will Data connect offshore wind farms located in the cluster DolWin1 Connection point shore: Dörpen West substation (Borkum West II wind farm, 400 MW, plus future unnamed Connection point offshore: DolWin alpha platform wind farms) to the German grid. Full Grid Code compliance Operator: TenneT Offshore GmbH, Germany of the 165 km long HVDC (high-voltage direct current) Start of project: July, 2010 transmission ensures a robust network connection. Commercial operation: Early 2013 Transmission technology: HVDC Light® by ABB With this transmission link, the range of extruded polymer Transmission capacity: 800 MW HVDC Light cables is extended to 320 kV DC. DC voltage: ± 320 kV AC voltage Dörpen West: 380 kV The system features the latest generation of ABB power semi- Cable route length: 165 km conductors. The increased performance ensures a higher - 75 km with submarine cables availability and lower losses of the entire system. - 90 km with land cables Featured submarine cable Independent control of active and reactive power flow, with - Extruded polymer insulated cable total control of power from zero to full power without filter - Conductor 1000 mm2 copper switching, enables smooth and reliable operation of the off- - Steel armoring shore wind farm. - Diameter 115 mm - Weight 34 kg/m This is the second DC grid connection of offshore wind farms Featured land cable delivered by ABB. - Extruded polymer insulated cable - Conductor 2000 mm2 aluminum - Diameter 118 mm - Weight 14 kg/m HVDC Light® converter stations: Convert alternate current (AC) to direct current (DC) and on the other side DC to AC. The proven HVDC Light extruded cable technology simplifies HVDC Light® systems (Voltage Source Converters and the installation on land and on sea allowing very short time for extruded polymeric DC cable), have now been implemented in cable jointing. The oil-free cables minimize the environmental 23 converter stations. More than 2,000 km of extruded poly- impact on sea and on land. meric DC cables have been installed. HVDC Light can also be supplied with overhead lines. ABB has been in the forefront of HVDC technology since 1954 and has an unparalleled history of supplying HVDC transmission schemes to the benefit of its customers. Today ABB has installed close to 60,000 MW in over 70 projects all over the world. www.abb.com/hvdc POW-0070 rev.1 Project In service Power MW DC voltage kV Station location Transmission Application Customer Hällsjön 1997 3 ± 10 Hällsjön, 10 kV 10 km Pilot system VB Elnät, Sweden Sweden Grängesberg, 10 kV (overhead) Gotland 1999 50 ± 80 Näs, 77 kV 70 km Wind, GEAB, Sweden Bäcks, 77 kV Undergrounding Sweden Directlink 2000 3 x 60 ± 80 Terranora, 110 kV 65 km Undergrounding TransEnergy, USA Australia Mullumbimby, 132 kV North Power, Australia Tjæreborg 2000 7,2 ± 9 Enge, 10,5 kV 4,4 km Wind, Eltra, Denmark Denmark Tjaereborg, 10,5 kV Undergrounding Eagle Pass 2000 36 ±15,9 Eagle Pass, 138 kV NA Grid reliability AEP, USA USA (both sides) (back-to-back) Cross Sound 2002 330 ±150 New Haven, 345 kV 40 km Grid reliability TransEnergie US, USA Shoreham, 138 kV USA Murraylink 2002 220 ±150 Berri, 132 kV 180 km Undergrounding TransEnergie US, Australia Red Cliffs, 220 kV USA Troll A 2005 2 x 41 ± 60 Troll A, 56 kV 67 km Offshore Statoil, Norway Norway Kollsnes, 132 kV Estlink 2006 350 ±150 Espoo, 400 kV 105 km Grid reliability, Nordic Energy Link AS, Estonia-Finland Harku, 330 kV Undergrounding Estonia Valhall 2011 78 150 Lista, 300 kV 292 km Offshore BP, Norway Norway Valhall, 11 kV BorWin1 2009 400 ±150 Diele, 380 kV 200 km Offshore wind TenneT Offshore GmbH Germany BorWin Alpha, 170 kV Germany Caprivi Link 2010 300 350 Zambezi, 330 kV 950 km Grid reliability NamPower, Namibia Gerus, 400 kV (overhead) Namibia East-West 2012 500 ± 200 Woodland, 400 kV 256 km Grid interconnection EirGrid, Interconnector Deeside, 400 kV Ireland Irland-UK DolWin1 2013 800 ± 320 Dörpen West, 380 kV 165 km Offshore wind TenneT Offshore GmbH Germany DolWin alpha, 155 kV Germany NordBalt 2015 700 ± 300 Klaipeda, 330 kV 450 km Grid interconnection SvK, Sweden Sweden Nybro, 400 kV LITGRID turtas, Lithuania Lithuania Skagerrak 4 2014 700 500 Kristiansand and 244 km Grid interconnection Statnett, Norway Norway Tjele, 400 kV Energinet.dk, Denmark Denmark DolWin2 2015 900 ±320 Dörpen-West 380kV 135 km Grid interconnection TenneT Offshore GmbH, Germany DolWin beta 155 kV Germany ABB AB Grid Systems - HVDC SE-771 80 Ludvika, Sweden Tel: +46 240 78 20 00 Fax: +46 240 61 11 59 www.abb.com/hvdc.