Strukton completes extra 380 kV connection Borssele
Borssele nuclear power station is getting an extra 380 kV connection to the electricity grid.
When it was awarded the contract in January 2016, after a process of creative brainstorming with client N.V. Elektriciteits-Productiemaatschappij Zuid-Nederland (EPZ), Strukton realised that besides safety, very tight planning management was key.
This in the knowledge that around a year is needed for the delivery of a transformer, the core device in the installation, which can handle 40 MVA. The transformer will be connected to TenneT's 380 kV grid (the highest voltage in the Dutch electricity grid) and will convert the voltage from this grid into a voltage of 6 kV, which it will deliver to the EPZ nuclear power plant.
Last May, the structural engineering work started, in partnership with contractors from the region. The installation had to be built against an existing switching station of grid operator TenneT. A 700 m long cable section links it to the power station.
On Friday 20 January, the transformer from Germany was lifted from the boat and raised on to its base. A difficult job.
Strukton has experience in expanding high voltage electrical equipment. Another project commissioned by TenneT is currently underway to create 110/220/380 kV spark coils in Eemshaven and Vierverlaten (Groningen). These will increase transport capacity with respect to the connection of wind power plants in the north of the Netherlands and Germany.
That experience led to an action plan which formed the basis for EPZ not only to award Strukton the Borssele project but also the technical coordination with third parties like TenneT. The grid operator also has an internal planning and imposes quality requirements for the connections.
The critical phase starts during the spring, when the power station is switched off and the fuel exchange period begins. Then Eber and his people have a few weeks to create and test the coupling. In mid-June, the new connection must be operational.
This news item is based on the report from the Technisch Weekblad.