Siemens Energy has been selected by MHI Vestas to deliver 114 low-loss 66kV distribution transformers for the Seagreen Offshore Wind Farm in Scotland.
With an installed capacity of 1,075 megawatts (MW), the wind farm will be Scotland’s single largest source of renewable energy and is forecast to provide low carbon energy for around 1.3 million homes.
The solution has been specifically designed to pass through the opening in the tower base without disassembly. Earlier Siemens Energy’s compact transformers also helped to enable the Deutsche Bucht offshore wind farm (in the picture) in the German North Sea, together with MHI Vestas Offshore Wind.
The fluid immersed distribution transformers will complement 114 MHI Vestas’ 10MW turbines that the company will deliver to the wind farm located 27 km from the Angus coastline in Scotland. The low-loss distribution transformers were designed to meet high-efficiency requirements.
The transformer voltage class of up to 72.5 kilovolts (kV) will enable larger power capacities, such as provided by MHI Vestas’ 10MW offshore wind turbines, while keeping energy losses low. After commissioning, the distribution transformers will transform the voltage from the low voltage of produced electricity to the medium voltage level of 66kV needed to feed the offshore transmission substation before going to the mainland with an even higher voltage. It is anticipated that the Seagreen Offshore Wind Farm will be operational by 2022/2023.
“Siemens Energy worked closely together with us to develop a customized design transformer that perfectly fits our demands for an energy-efficient solution with minimum footprint,” said Robert Slettenhaar, Vice President, Head of Procurement and Category Management at MHI Vestas Offshore Wind. “The transformers represent a critical component in our wind turbines and I am glad that with Siemens Energy we found a reliable and experienced partner for this significant project.”