Borssele Alpha Offshore High Voltage Substation - 700 MW - offline
Dutch North Sea
Topside 58x32x26 metres
The Offshore High Voltage Substation (OHVS) Borssele Alpha (jacket and topside) is required to link up the wind farms to be built offshore in the South-West section Borssele 1 & 2 areas of the Dutch North Sea. HSM Offshore is also partner for TenneT’s next offshore wind energy project, Borssele Beta (700 MW).
The Borssele Alpha project, together with 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. The scope covers engineering, procurement, construction, transport, installation, connection and testing of the OHVS. The Borssele Alpha and Beta OHVS will be the largest AC substations in the world.
- WeightTopside 3700 tonnes
Jacket 2900 tonnes including cable deck and J-tubes
Piles 1400 tonnes
- CapacityTotal power 700 MW (2x350 MW)
Intake voltage 66 kV
Export voltage 220 kV
- Contract AwardFebruari 2017
- CompletionAugust 2019
- ClientTenneT TSO BV
- Consultant/EngineerIv-Offshore & Energy / Joulz
Animation - Jacket Assembly