OK for offshore grid modules

The green light has been given for offshore wind farms to use multiple smaller single transformer offshore substations.

The Security and Quality and Supply Standards has completed its review on single transformer platforms and given its blessing to developers using smaller substations which can be mounted on a platform using the same foundation as the wind turbine.

The modules are expected to be used for the first time on Mainstream’s 450MW Neart na Gaoithe offshore wind farm in Scotland.

The panel, which took evidence from developers, manufacturers, OFTOs and Ofgem, said the move will save on cost and the need for specialised heavy lifting vessels.

It found it will simplify the offshore substation application process. Previously, developers would have to apply for a design variation to use the smaller single transformer substations.

Chair of the panel, David Phillips from National Grid said: “The new design took an innovative engineering approach, but the panel had to be sure that it would prove robust against the standards and deliver cost benefits to the end consumer.  

“Often innovation and new technologies can be held up by regulations and codes from earlier times, but we set an ambitious timeframe to complete the review. Thanks to the commitment of the team who were keen to see the modification pushed through and perform  the rigorous analysis needed, we were able to deliver in record time.”

The full findings of the review panel can be found here. 

Image: Siemens design for single transformer substations (Siemens)