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Offshore Wind and the
European Supergrid
Joe Corbett,
Head of Technical Services
Mainstream Renewable Power
Representing: Friends of the Supergrid
Offshore Wind Installations 2010
Source: EWEA
http://www.ewea.org/index.php?id=1861
Offshore Generation Location up to 2010
Foundation Design Evolution
Offshore Research
• Hywind – Spar Type Floating Foundation
 Norway 200m
 Statoil
• Blue H – Tension Leg Platform (TLP)
 Netherlands 100m
• Windfloat – Semi Submersible
 Portugal 40m
• Offshore Wind Accelerator
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Carbon Trust + 8 Developers
Wind Analysis
Electrical and Foundation Design
Operation and Maintenance
Offshore Trends
Turbine Size Trend
Source EWEA
Principle Power’s Windfloat
Design
Why the Supergrid?
• Move Offshore
• Single European electricity market
• Security and sustainability of
supply
• Carbon neutral Europe by 2050
Supergrid Phase 1 – Design Drivers
• Offshore Wind
 25-30 GW 2020 in the North
Sea (UK, Germany, Belgium)
• UK Network Congested
• North Germany – High Wind
Penetration
• Hydro balance capability
Supergrid Phase 1 - Cost
Project Financing:
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€28 billion (2010 value)
30 % RoE
6 year building time, 40 years of operation
23GW of Wind Generation Connected
Capacity factor:
 40% - if the wind alone trades on the system
 90% - when wind and other energy/service providers use the network
TUOS : 1,55 - 4,67 c/kWh
Socialised: 0.23 c/kWh
Technology Today (2015):
• HVDC – VSC
 1 GW
 Losses < 1.5%
• HVDC Cables
 XLPE – 300kV
 MI (Oil) – 500kV
Supergrid Technology (2015):
• The SuperNode – Hybrid
AC/DC Design
• HVDC based on VSC (Voltage
Source Converter) technology
Technology Developments
• Improved Converter Design
 <<< Losses
 >>> Power
• Cable
 >>> XLPE Voltage Capability
• Multi-Terminal Wide Area Control System
• System Dynamics
 Inertia
 Fault Performance
• DC Switchgear
• Onshore Transmission
 GIL
 Superconductivity
Policy and regulatory aspects at a glance
• Master Plan:
Entso-e
• One Operator:
ISO
• One Grid Code:
Entso-e
• One Regulator:
ACER
Thank you for your attention
www.friendsofthesupergrid.eu