wind r&d seminar deep sea offshore wind challenges and ... · contact person:...
TRANSCRIPT
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Wind R&D Seminar – Deep Sea Offshore Wind
Challenges and Design of Offshore Substations
Christer Olerud
Trondheim
20.01.2011
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New large Nordic company
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Offshore wind farm overview
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Offshore substationOffshore wind farm Land connection point
Cable to shore3-phase ACg o o d t e c h . n o
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Offshore wind = multidiscipline industry
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Main Challenges
Location of offshore substation
Number of offshore substations
Infield cable pattern and choice of cable types
Offshore substation layout
Reactive power compensation
Grid connection
Total electrical system
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Inter array cable network
Optimizing inter-array
cable network
1 or 2 substations,
inside or outside wind
farm area
Radials or loops
Cable sizes
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WES – Wind Energy Simulator
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Offshore substation layout and equipment
Cooling of transformers *
Switchgear
Cable pull-in
Bus ducts *
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Accommodation
External cladding
Optimized layout
Installation *
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Main transformers
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160 MVA transformer from ABB
GIT: Gas insulated transformer (Toshiba)
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Offshore substation, bus ducts
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Offshore substation, installation
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http://www.scaldis-smc.com http://www.scaldis-smc.com
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Offshore substations
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Reactive compensation
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Offshore substationOffshore wind farm Land connection point
Cable to shore3-phase ACg o o d t e c h . n o
Wind turbine
(turbine manufacturer)
Offshore substation
(wind farm owner)
Onshore grid
(grid owner)
How to optimize ? Demands from grid owner (grid code)
Placement of equipment
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Grid connection
PCC (Point of Common Coupling)
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OSS
Onshore coupling point
OWTs
External grid
PCC definition a
PCC definition b
PCC definition c
a) at connection point onshore at the grid
coupling point
b) at high voltage busbar at the OSS
c) at the OWT terminals
Capability in the onshore transmission grid
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Thank you for your attention!
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Offshore substationOffshore wind farm Land connection point
Cable to shore3-phase ACg o o d t e c h . n o
Thank you for your attention!
Contact person: [email protected]