East-West Interconnector Connecting and Britain

United Kindom

Woodland Liverpool Dublin Deeside Ireland

The 500 MW East-West Interconnector HVDC Light® trans- Data mission system will connect the grids of Ireland and Wales. Connection point Irish grid: Woodland This is the first HVDC Light project to use ±200 kV cables sea cable landing: Rush North Beach, Co. Dublin and the link is about 260 km long. Connection point British grid: Deeside sea cable landing: Barkby Beach, North Wales Ireland has plans to expand the generation and the Operator: Eirgrid, Ireland link will facilitate addition of renewables and give the possibility Commercial operation: 2012 to export excess energy to the UK market and vice versa. The Transmission technology: HVDC Light® by ABB new link will also enchance security of supply in the Irish grid Transmission capacity: 500 MW and allow Ireland and Britain access to more competition. DC voltage: ± 200 kV AC voltage: 400 kV Additional customer benefits, due to the choice of the HVDC Cable route length: 261 km Light technology, are “black start”, a way of restoring power - 186 km with parallel submarine cables after a blackout without the aid of external energy sources, and - 75 km with parallel land cables active AC voltage support. Featured submarine cable - Extruded polymer insulated cable - Conductor 1650 mm2 copper - Steel armoring - Diameter 117 mm - Weight 39 kg/m Featured land cable - Extruded polymer insulated cable - Conductor 2210 mm2 aluminum - Diameter 107 mm - Weight 12 kg/m HVDC Light® converter stations: Convert alternate current (AC) to direct current (DC) and on the other side DC to AC. A proven extruded cable technology is used that 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 HVDC Light® cables minimize the 23 converter stations. More than 2,000 km of extruded poly- environmental 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 www.abb.com/hvdc schemes to the benefit of its customers. Today ABB has installed close to 60,000 MW in over 70 projects all over the world. POW-0069 rev.3

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 turtas, Lithuania Skagerrak 4 2014 700 500 Kristiansand and 244 km Grid interconnection , Norway Norway Tjele, 400 kV .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