Sembcorp Marine and GE to deliver Sofia HVDC system
Sembcorp Marine Ltd and GE Renewable Energy’s Grid Solutions have secured
a contract from RWE Renewables, to supply the high voltage direct current
(HVDC) electrical transmission system for the Sofia
offshore wind farm.
Sembcorp Marine and GE Renewable Energy’s Grid Solutions began early design
works for the project in July 2020, after being chosen as the preferred
supplier of the HVDC electrical transmission system. The HVDC system represents
second largest contract and is worth approximately £600 million (S$1.12
The contract work scope comprises the design, manufacture, installation,
commissioning and maintenance of the offshore converter platform (OCP)
and the onshore converter station (OCS), including all ancillary equipment.
Sembcorp Marine’s scope of work includes the design, construction, installation
and commissioning of the OCP.
The OCP, at the heart of the wind farm, comprises a 17,000-tonne topside
and jacket foundation structure piled into the seabed 220 km from the nearest
shore. It will be the most powerful and most remote OCP ever built.
Construction of the offshore converter platform by Sembcorp Marine will
start this year, with delivery and installation in 2023.
Sven Utermöhlen, Chief Operating Officer Wind Offshore Global of RWE Renewables,
said: “Signing this contract with the consortium of GE’s Grid Solutions
and Sembcorp Marine for the supply of Sofia’s HVDC electrical system reflects
RWE’s strong commitment to innovation and to pushing the boundaries of
what is capable within the sector. The 1.4GW Sofia project is our first
to use the HVDC technology, which was selected to maximise the wind farm’s
export capacity from a location so far from shore. We are delighted to
be working with such a strong pairing on the delivery of this flagship
project located on the remote Dogger Bank, in the middle of the North Sea.”
Mr Samuel Wong, Head of Sembcorp Marine Offshore Platforms said: “Sembcorp
Marine is excited to work on this mega-project with GE Renewable Energy’s
Grid Solution to support RWE Renewables’ Sofia Offshore Wind Farm project
to augment its supply of wind energy in the UK.”
“We are grateful to RWE for its vote of confidence in Sembcorp Marine’s
capabilities and outstanding track record of delivering offshore platforms
to major field developments in Europe and Asia. As we move from early design
work to the next phase of this groundbreaking project, we are committed
to drive design, engineering and operational excellence and deep value
creation for our customer, added Mr Wong.”
“As the HVDC consortium leader for the Sofia Offshore Wind Farm, we are
excited to move ahead with this project,” said Raj Iyer, Grid Integration
Leader at GE’s Grid Solutions. “The award of Sofia and operational success
of DolWin3 offshore wind HVDC last year are evidence that GE’s Voltage
Source Converter technology is now well established, and that GE has the
ability to commercially deliver on this latest and most advanced HVDC technology.’’
The 1.4 GW Sofia
offshore wind farm is located 195 kilometres from the UK coast on Dogger
Bank, in the shallow area of the central North Sea. RWE announced last
week (24 March 2021) that it had taken the Financial Investment Decision
on its 1.4 GW Sofia
offshore wind project. The 100% RWE-owned project represents a total investment
of approximately £3 billion.
The company is now poised to forge ahead with the construction of Sofia,
with onshore enabling works due to start this spring and offshore construction
in 2023. Final project completion is expected by Q4 2026. RWE was awarded
a Contract for Difference (CfD) for Sofia in 2019, achieving a strike price
of £39.65 per megawatt hour (in 2012 prices).
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