Two initiatives may help "produce the cheapest ever electricity generated from a UK offshore wind farm," says Mainstream Renewable Power. Mainstream will use Siemens' offshore transformer module (OTM) instead of a substation at its 448 megawatt Neart Na Gaoithe project in Scotland.

The developer also says that its contractor, GeoSea, will use High Wind's Boom Lock system, allowing for safe component installation in higher wind speeds, reports Wind Power Offshore.

Siemens' OTM removes the need for a topside platform and can be installed across two turbine foundations. This would save 30% in capex costs. The OTM was unveiled by Siemens at the EWEA Offshore 2015 conference in Copenhagen in March.Siemens' OTM for the offshore wind farm project. Source: Siemens

The modules can be mounted on special "balconies" fitted to turbine foundation transition pieces. Alternatively, the OTM could also be fitted to a separate turbine foundation without a turbine.

Mainstream was able to secure a contract by bidding to produce energy at £114.39/MWh ($172/MWh). The offshore wind farm is due to enter service by 2020.