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RWE Innogy: 'Wedding' on the high seas
Substation erected for the Nordsee Ost offshore
wind farm in the German North Sea
1,800 ton substation platform successfully
placed on foundation
The system will now be connected with the
export cables and the inter-array cables,
prior to commissioning
Substation platform was successfully placed on
foundation
 July 21, 2014 + + + A
'wedding' was celebrated on
the Nordsee Ost offshore wind farm construction site of RWE Innogy: This
is what the construction process is called when the foundation is
successfully married to the substation platform. As a result the sea-based
transformer substation and all its electrical components have now been
successfully completed.
(Photo © RWE)
The journey of the
1,800 ton substation started in Danish Aalborg and took three days to ship
across the North Sea. The substation is 15 meters above the construction
area of RWE Innogy’s Nordsee Ost offshore wind farm, which is located some
30 kilometres north of the island of Heligoland. A floating crane placed
the heavyweight substation onto the foundation on Saturday, completing the
installation of the heaviest component of the offshore wind farm.
“The substation was
developed and built within a 16 month time frame by our contractor Bladt
Industries, a steel construction company, together with the Danish
subcontractors Semco and ISC,” said Matthias Esken, Project Manager for
the transformer substation at Nordsee Ost. “We are now going to connect
the substation with the previously installed inner-array cables and the
TenneT export cables which remain to be installed.” And Marcel Sunier,
Project Director for the Nordsee Ost wind farm at RWE Innogy, added: “The
heart of the wind farm has now been installed with the transformer
substation. As soon as access to the grid has been provided, we will start
the commissioning. The wind farm is expected to be complete at the end of
2014, with the testing phase to be finished in spring 2015.”
The offshore
substation transforms the electricity generated by the 48 wind turbines at
33 kV (kilo volt) to a transmission voltage of 155 kV. Submarine
high-voltage cables then transmit the electricity to the transformer
platform of TenneT where the AC voltage is transformed to 250 kV DC
voltage and transmitted to the nearest grid access point at Brunsbüttel.
The grid operator TenneT is responsible for the grid access.
Like the wind turbines, the transformer
substation was anchored on a jacket foundation to the seabed and will rise
about 40 meters above the sea level following final assembly.
Once complete, the
Nordsee Ost offshore wind farm will have an installed capacity of some 295
megawatts and supply the equivalent of about 300,000 private households
with electricity per year. Equipped with the currently most powerful
offshore turbines, Nordsee Ost ranks among the largest commercial wind
power projects off the German coast.
Source:
RWE Innogy
+ + +
Bladt Industries: Load out of the Nordsee Ost substation
July 7, 2014
+ + + Last week marked the end of yet another successful project at
Bladt Industries, as the Bladt team completed the load out of the Nordsee
Ost substation.
The substation is now on the barge, where it
will undergo measures to secure sea fastening before it makes its journey
to the final destination in the German North Sea. The 1900 tonnes
substation, which Bladt Industries fabricated for the German utility
company RWE, is the 13th substation fabricated by Bladt Industries.
The cooperation
between RWE and Bladt has been great from day one. Both parties entered
into the project with the same goal: to make a substation of the highest
quality within a very strict time frame. The EPC-contract was completed
within 15 months – quite a short time period to fabricate a substation.
Senior Project
Manager, Torben Hother Hansen: “In this project we especially had one
challenge – the time frame. However, with our knowledge and experience
from previous projects we were able to reach our goals of fabricating a
substation of the highest quality within a very tight time schedule.”
Source: Bladt Industries -
www.bladt.dk
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