Hywind Scotland – Marine Operations Stavanger...Hywind Scotland – Marine Operations Science...
Transcript of Hywind Scotland – Marine Operations Stavanger...Hywind Scotland – Marine Operations Science...
© Statoil ASA 2014
Hywind Scotland – Marine Operations
Science Meets Industry Stavanger 06.04.2016
Knut Harald Lien
Agenda
• Introduction
• Statoil and floating wind
• What is Hywind Scotland Pilot Park
• Hywind Scotland Marine Operations
• Questions
2
Current Portfolio
Statoil positioning in offshore wind
2009- 2012- 2017
2.3MW
Sheringham
Shoal
Hywind
Demo
317MW
1.11 Twh / yr
Hywind
Commercial
Park
Increase Portfolio & Acreage
Hywind
pilot park
402MW
1.7 Twh / yr
Dudgeon
30MW
0,14 Twh / yr
1200MW
each project
Dogger
Bank
In operation In operation FID 02.11.2015
Construction and
installation phase
FID
Construction and
installation phase
2017- 2020-
Japan
US
North
West
Europe
3
4
What is Hywind?
• Floating wind turbine (FWT)
• A standard offshore wind turbine
placed on a ballasted vertical steel
cylinder, anchored to the seabed
• Active motion controller
• Statoil-owned technology
Pilot Park, 3-6 turbines <2017
Concept 2001
Model test 2005
Full-scale prototype 2009
Large Parks, 500-1000MW <10 years
© Statoil ASA 2014
Hywind Scotland Pilot Park
5
Installed capacity (5 WTGs) 30 MW
Transmission voltage 33 kV
Water depth 95-120 m
Mean waves, Hs 1.8 m
Average wind speed (@100 m) 10.1 m/s
Major milestones:
Final investment decision 2015
Construction/installation 2016/2017
In operation 2017
© Statoil ASA 2014
Project objectives
• Test multiple units in park-configuration
• Verify up-scaled design
• Optimize assembly and installation
• Verify reliability and availability of optimized
multi-turbine concept
• Mobilize supply chain
6
Demonstrate cost-efficient and low risk solutions for commercial scale parks
Hywind Demo Hywind Scotland
© Statoil ASA 2014
Park location and cable corridor
7
© Statoil ASA 2014
Hywind Scotland Pilot Park
8
© Statoil ASA 2014
Field layout
9
© Statoil ASA 2014
Marine operarations
• Transportation of Substructures
• Upending of Substructure
• Dry ballasting and de-ballasting
• Lifting and mating of fully assembled WTG onto Substructure
• Mooring anchors and bottom chain installation
• Intermediate mooring chain installation and pretensioning
• Tow to field & hook-up
• Cable installation and trenching
10
© Statoil ASA 2014
Marine Ops Schedule
11
© Statoil ASA 2014
Transportation of Substructures (3 trips)
12
• Substructures will be transported from Fene in Spain to Stord
• Float-on operation inshore
• Transport across Bay of Biscay and English Channel
• Float-off at Stord
© Statoil ASA 2014
Typical Substructure
13
© Statoil ASA 2014
Upending
14
• Water pumped into Substructure in order to upend it
• Pictures from Hywind Demo in 2009
© Statoil ASA 2014
Floating Quay - Before mating
15
Text large (build up) including image
Dry ballasting and de-ballasting
• Approx. 5,000Te of magnetite will be installed in each Substructure
• Typical rock installation vessel with loading arm
• Simultaneous de-ballasting of water in order to maintain draft
16
17
Mating
18
Mating
© Statoil ASA 2014
Floating Quay - After mating
19
© Statoil ASA 2014
Mooring system pre-installation
20
• Separate campaign for suction anchor and bottom chain pre-installation
(~100Te, 16m x 5m Ø)
• Intermediate chain and pre-tensioning
© Statoil ASA 2014
Tow to field & hook-up
• 4 days at 3-knot speed per WTG
• Model tests performed to check VIM
• Hook-up performed simulatenously as the next WTG is towed out
21
© Statoil ASA 2014
Hook-up
22
© Statoil ASA 2014
Power cable installation
• Loadout of cables from Nexans in Halden
• Installation of vertical riser anchors and mattresses for crossings
• Installation of export cable – starting at Peterhead
• Installation of 4 infield cables
• Trenching of export cable
• Rock installation
23
© Statoil ASA 2014
Deck layout
24
© Statoil ASA 2014
Landfall pull-in
• 600-700m duct
• Exit at -14m
• Pre-installed
messenger wire in
duct
2014-05-09 25 Classification: Open
© Statoil ASA 2014
Landfall pull-in
26
© Statoil ASA 2014
Dynamic riser configuration
27
Pliant wave design
© Statoil ASA 2014
Dynamic riser configuration
28
• All risers have almost identical tethered wave configurations
• Approx 30 off buoyancy modules
• Vertical anchor and tether system
• Horizontal anchor by means of rock installation or hold back
anchor
© Statoil ASA 2014
Installation steps • Export cable:
− Installation of a vertical tether anchor
− Pull-in at landfall through pre-drilled Horizontal Direction Drilling (HDD) duct
− Cable-lay in pre-defined route - 26km
− 2nd end pull-in of cable at FWT (incl. buoyancy modules and connection to vertical anchor)
− Trenching of the export cable route
− Rock installation in areas where trenching is not possible
• Infield cables:
− Installation of vertical tether anchors (one for each dynamic riser)
− 1st end pull-in of cable at FWT (incl buoyancy modules and connection to vertical anchor)
− Cable-lay of static section of cable – approx 1km
− 2nd end pull-in of cable at FWT (incl buoyancy modules and connection to vertical anchor)
− Rock installation in some areas due to on-bottom stability issues, alternatively trenching is an option
29
© Statoil ASA 2014
1st end installation - through moonpool or using vertical lay system
30
© Statoil ASA 2014
Questions?
2014-05-09 31 Classification: Open
Hywind Scotland - Developing the UK’s
first floating wind park
Knut Harald Lien
Company Representative – Cable
fabrication and Installation Contracts
Hywind Scotland Pilot Park
Tel: +4792234138 www.statoil.com
32 © Statoil ASA 2014
This presentation, including the contents and arrangement of the
contents of each individual page or the collection of the pages,
are owned by Statoil. Copyright to all material including, but not
limited to, written material, photographs, drawings, images,
tables and data remains the property of Statoil. All rights
reserved. Any other kind of use, reproduction, translation,
adaption, arrangement, any other alteration, distribution or
storage of this presentation, in whole or in part, without the prior
written permission of Statoil is prohibited. The information
contained in this presentation may not be accurate, up to date or
applicable to the circumstances of any particular case, despite
our efforts. Statoil cannot accept any liability for any
inaccuracies or omissions.