SGRE set to debut 200-metre rotor turbine

Siemens Gamesa Renewable Energy (SGRE) is in line to supply Ørsted with an upgraded version of its 11MW turbine featuring an enlarged 200-metre rotor for two German offshore wind farms with a combined capacity of more than 1.1GW.

SGRE's SG 11.0-193 DD undergoing testing at Osterild in Denmark

The Danish developer named SGRE as preferred supplier for its 253MW Gode Wind 3 and 913MW Borkum Riffgrund 3 projects in the North Sea, which are expected online in 2024 and 2025 respectively.

It is the first time SGRE has been contracted for a turbine with a 200-metre rotor diameter.

Since unveiling an 11MW turbine at WindEurope’s offshore conference in Denmark last November, SGRE has won more than 4GW in conditional orders for projects off of the Netherlands and the US.

But these orders were either for the 193-metre rotor model or did not specify.

The manufacturer explained it had re-used the blade design for its SG 11.0-193 DD model and extended it to stretch its new B97 IntegralBlades to 97 metres in length.

With an 11MW output rating and 200-metre rotor diameter, the newly upgraded SG 11.0-200 DD, has a specific power rating of 350W/m2 making it more efficient than its SG 11.0-193 DD, which has a specific power rating of 376W/m2.

The manufacturer said the increase in rotor diameter for the SG 11.0-200 DD was disproportionate to the increase in blade weight.

While the rotor diameter had been enlarged by 3.5% to 200 metres, each B97 blade will be less than 3.5% heavier than the B94 blades used on the 193-metre rotors.

The upgraded 11MW machine will be capable of providing an increase of 9% in annual energy production from the SG10.0-193 DD, the manufacturer claimed. 

The preferred supplier agreement for the two projects is subject to certain conditions, SGRE stated.

These include Ørsted’s final investment decision, which itself is subject to the projects receiving final grid dates and final consents from the German authorities.

If all goes as planned, however, installation is scheduled to begin at Gode Wind 3 in 2023 ahead of commissioning in 2024, while at Borkum Riffgrund, installation could start in 2024 ahead of the project going online in 2025.

Siemens Gamesa would also service the wind farms for five years if the preferred supplier agreement is upgraded to a firm order.