Skagerrak 4 Excellent benefits through interconnections Oslo Kristiansand Gothenburg Tjele Copenhagen The new link will boost transmission capacity between the mainly hydroelectric-based Norwegian system and the wind and thermal power-based Danish system by an additional 715 MW. It will enable both networks to add more renewable energy to their energy mix, and to use electricity more efficiently. With the Skagerrak 4 link, Norway and Denmark will have a total power exchange possibility of 1,655 MW. The link goes between Kristansand, in southern Norway, and Tjele on Denmark’s Jutland peninsula. The link is owned by Statnett in Norway, and Energinet.dk in Denmark. Data Commissioning year: Pole 4: 2014 Pole 3: 1993 Pole 1& 2: 1976-77 Power rating: Pole 4: 715 MW Pole 3: 440 MW, Pole 1+2: 500 MW No. of poles: 4 (2 bipoles) AC voltage for Pole 4: 400 kV (Kristiansand), 400 kV (Tjele) DC voltage: Pole 4: 500 kV (HVDC Light) Pole 3: 350 kV (HVDC CLassic) Pole 1&2: 250 kV (HVDC Classic) Length of DC submarine cable routes: Skagerrak 4: 140 km The Skagerrak 4 HVDC Light link will be operated in a bipole configuration with the Skagerrak 3 HVDC Classic link. This is the first time a Classic and a Light link will be tied together in such a bipole configuration. This is possible due to the advanced MACH2 control system, which is used in over 700 HVDC and FACTS installations world-wide, also used for the Skagerrak 1-2 upgrade in 2007. The system will help overcome distance and grid constraints while ensuring robust performance, power quality and minimal electrical losses. In the rare case of complete power system outage, the technology’s ‘black-start’ capability allows for a fast network restoration using power from the other end of the link. These factors were essential in the selection of the HVDC Light technology. Skagerrak 1-3: 127 km, Lenth of DC land cable route: Skagerrak 4: 104 km Length of DC overhead line: Skagerrak 1-3: 113 km Main reason for choosing HVDC: Length of sea crossing, asynchronous link. For pole 4, HVDC Light was chosen for its premier power quality features. ABB will design, supply and commission two 715 MW (megawatt) converter stations located at both ends of the 244-km long interconnection, and will be situated at the same site as the existing converter stations for Skagerrak 1-3, previously supplied by ABB, in Kristiansand, Norway and Tjele, Denmark. The project is scheduled for commissioning in 2014. 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. The proven HVDC Light extruded cable technology is used that simplifies installation on land and on sea allowing very short time for cable jointing. The oil-free cables minimize the environmental impact on sea and on land. DC voltage kV Station location www.abb.com/hvdc Project In service Power MW Transmission Application Customer Hällsjön 1997 3 ± 10 Hällsjön, 10 kV 10 km Pilot system VB Elnät, Sweden Grängesberg, 10 kV (overhead) 1999 50 ± 80 Näs, 77 kV 70 km Wind, GEAB, Undergrounding Sweden 65 km Undergrounding TransEnergy, USA 4,4 km Wind, Eltra, Denmark Sweden Gotland Sweden Directlink Bäcks, 77 kV 2000 3 x 60 ± 80 Australia Tjæreborg Mullumbimby, 132 kV 2000 7,2 ±9 2000 36 ±15,9 2002 330 ±150 Denmark Eagle Pass USA Murraylink 2002 220 ±150 2005 2 x 41 ± 60 2006 350 ±150 2011 78 150 2009 400 ±150 (both sides) (back-to-back) New Haven, 345 kV 40 km Grid reliability TransEnergie US, 180 km Undergrounding 67 km Offshore Statoil, Norway 105 km Grid reliability, Nordic Energy Link AS, Undergrounding Estonia 292 km Offshore BP, Norway 200 km Offshore wind TenneT Offshore GmbH Zambezi, 330 kV 950 km Grid reliability Gerus, 400 kV (overhead) Woodland, 400 kV 256 km Berri, 132 kV USA Troll A, 56 kV TransEnergie US, USA Espoo, 400 kV Lista, 300 kV Diele, 380 kV BorWin Alpha, 170 kV 2010 300 350 Namibia East-West AEP, USA Valhall, 11 kV Germany Caprivi Link Grid reliability Harku, 330 kV Norway BorWin1 NA Kollsnes, 132 kV Estonia-Finland Valhall Undergrounding Eagle Pass, 138 kV Red Cliffs, 220 kV Norway Estlink North Power, Australia Shoreham, 138 kV Australia Troll A Enge, 10,5 kV Tjaereborg, 10,5 kV USA Cross Sound Terranora, 110 kV 2012 500 ± 200 Interconnector Germany NamPower, Namibia Grid interconnection Deeside, 400 kV EirGrid, Ireland Irland-UK DolWin1 2013 800 ± 320 Germany NordBalt Dörpen West, 380 kV 165 km Offshore wind 450 km Grid interconnection DolWin alpha, 155 kV 2015 700 ± 300 Klaipeda, 330 kV Germany Nybro, 400 kV Sweden Lithuania 2014 700 500 Norway Kristiansand and 244 km Grid interconnection Tjele, 400 kV Statnett, Norway Energinet.dk, Denmark Denmark DolWin2 SvK, Sweden LITGRID turtas, Lithuania Skagerrak 4 TenneT Offshore GmbH 2015 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 900 ±320 Dörpen-West 380kV DolWin beta 155 kV 135 km Grid interconnection TenneT Offshore GmbH, Germany POW-0074 rev.0 HVDC Light ® systems (Voltage Source Converters and the extruded polymeric DC cable), have now been implemented in 23 converter stations. More than 2,000 km of extruded polymeric DC cables have been installed. HVDC Light can also be supplied with overhead lines.
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