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

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  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

Move Offshore Single European electricity market Security and sustainability of supply Carbon neutral Europe by 2050 Why the Supergrid?

Supergrid Phase 1 – Design Drivers Offshore Wind  GW 2020 in the North Sea (UK, Germany, Belgium) UK Network Congested North Germany – High Wind Penetration Hydro balance capability

TUOS : 1,55 - 4,67 c/kWh Socialised: 0.23 c/kWh Supergrid Phase 1 - Cost Project Financing:  €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

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

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