Hans Kvarme Nexans Norway AS. Offshore vindkraft Oslo, 14. desember 2010

Transcription

1 Hans Kvarme Nexans Norway AS Offshore vindkraft Oslo, 14. desember 2010

2 Nexans Norway AS Rognan Oslo (HQ) Namsos Langhus Karmøy Halden Telecom and Building Energy Networks Energy 2

3 Turn-key Supplier 1 Engineering/Design 3 Cable Manufacturing 2 Type Testing 4 Land Operations 5 Marine Operations

4 Halden Plant 2010

5 State of the art and latest technology developments in HVAC transmission 2002 Horns Rev 1 and 2 Offshore Wind Farm, 170kV 3x630 mm Smøla Wind Farm, 132kV 3x500 mm Barrow Offshore Wind Farm, 132kV 3x300 mm Lynn and Inner Dowsing 36kV 3x mm Ormen Lange, 420kV 1x1200 mm² 2008 Wolfe Island Wind Farm, 245kV 3x500 mm 2 Fibre optic cable Conductor Armour wires Outer corrosion protection XLPE insulation system Lead sheath

6 Challenges related to offshore wind farms Very long 3-core cables at high voltage Increased transmitting capacity Dynamic applications Requirement for coilable designs Different ambient conditions along the cable route Extreme burial depths at land fall and/or dredged areas Different conductor cross sections along the cable route Shallow water installation IEC rating of three-core cables is not OK for typical submarine designs Incorrect loss distribution (the infamous armour loss) Solution: Cigre 2010 paper, B1_116 Customers tends to oversize cables Common approach required to optimize cable design

7 AC submarine cables Technological status Experience with XLPE insulated cables from 1960 s Long experience with MV (12-36 kv) submarine cables in both static and dynamic applications

8 AC submarine cables Technological status Nexans installed the worlds first 170 kv 3-core XLPE insulated submarine cable to the Horns Rev offshore wind farm in Cable length 21 km Power transmission capacity 160 MW Step 2 (210 MW) of this wind mill farm Horns Rev II (43 km) was installed in Oct. 2008

9 AC submarine cables

10 Wolfe Island Submarine Power Cable Location: Canada Customer: Canadian Renewable Energy Corporation (CREC) Description / Challenge World s first 3-core 245kV XLPE submarine cable Supply of related accessories Nexans Solution / Technology 8 km of TKRA 245kV 3x1x500mm 2 Spare cable joints Onshore accessories

11 Hywind Project Location: Norway Customer: Statoil Hydro Description / Challenge Supply of subsea cable for the world s first floating windmill Supply of related accessories Nexans Solution / Technology 11 km of XLPE 24kV + 24 FO submarine cable Spare cable joints Other accessories Marine installation

12 London Array Location: UK Scope of work: 4 export cables TKRA 170kV 3x1x630mm 2 TKRA 170kV 3x1x800mm 2 800mm 2 at each 3km end 47-48km 630mm 2 main length Delivery: 2 Cables in Cables in 2012

13 Belwind Location: Belgium Scope of work: 165MW TKRA 170kV 3x1x500/600mm 2 50km Windfarm 165 MW total, 1 export cables: 165MW/cable 55 turbines, 3MW each (Vestas)

14 Lincs Offshore Windfarm Location: UK Customer: Centrica (Lincs) Ltd Scope of work: 250 MW TKRA 145kV 3x630/1000mm 2 Two lengths of 49km, 98km total Including a Fiber Optic element 84 fibers Joints, drum for spare length and accessories

15 Sheringham Shoal Location: UK Customer: SCIRA, Statoil (50 %) and Statkraft (50 %) Scope of work: 315 MW 2 x 21km TKRA 145 kv 3x1x630 mm² 2 x 0.2km TKRA 145 kv 3x1x1000 mm² Including a FO element Joints, spare length and accessories

16 Ormen Lange Grid Connection Location: UK Customer: Statnett Scope of work: 1000 MW TKRA 420kV 1x1200 mm² 4-500m land sections on both sides 2.4km submarine cable Maximum water depth of 210 m Transformer station 420 kv cable Nyhamna Transformer station

17 Conductor stress [MPa] Dynamic Applications Nexans Norway has experience with dynamic MV XLPE AC cables since 1980 ies Platforms, FPSO, floating wind turbines In-house expertise on dynamic analyses and cross section analyses by Riflex, UFLEX Cable capacity and extreme responses in the bend stiffener area Cable capacity 60 extreme responses 100% utilisation 80% utilisation Cable 1 Cable 2 Cable Static water depth [m]

18 Very long cables (> 120 km, 7000 MT) Marine Installation - Laying

19 Protection Protection against hazards, such as Anchoring Fishing Dropped objects

20 Trenching in soft to hard sediments Trench depth m Operation to 1000 m water depth Protection The CAPJET ROV system, by Nexans

21 Additional Protection Concrete bags Mattresses Rock dumping

22 Thank you for your attention!