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TenneT Awards the First Contract for Power Outlets for the Borssele Alpha Project


Borssele Offshore Windfarms 1 & 2, with HV-platforms Borssele Alpha and BetaTenneT TSO has awarded a contract to HSM Offshore for the construction of offshore transformer stations (platforms) required to link up the Borssele Offshore Windfarms to be built offshore in the south-west of the Dutch North Sea. The contract concerns the offshore platform for the Borssele Alpha connection. HSM Offshore is also the intended partner for TenneT’s next offshore wind energy project, Borssele Beta.

The Borssele Alpha project, to be followed by the Borssele Beta project, are the first large-scale grid connections to be constructed under the National Energy Agreement for offshore wind farms in the Netherlands.

HSM Offshore, part of the ANDUS goup, will take on the engineering, procurement, construction, transport, installation, connection and testing of the offshore transformer station under an EPCI contract. The platform will be handed over during the summer of 2019.

The total weight of the platform, including jacket and piles will be in the range of 8,000MT and the approximate dimensions of the platform deck will be 58m long, 32m wide and 26m high.

Iv-Oil & Gas, with whom HSM have successfully completed many previous platform projects – will be responsible for the design, engineering and procurement support, including the integration of the Tennet free issued High Voltage components and the balance of plant materials.

HSM/Iv-Oil & Gas have subcontracted the High Voltage control integration to the specialist company Joulz. The first ever offshore transformer station was delivered by HSM in 2002 for the Danish Horns Rev A project, for which Iv-Oil & Gas also provided the technical support, which is also the case for the 450 MW Borkum Riffgrund 2 offshore transformer station, which is currently under construction in the yard of HSM.