Ørsted asks for ‘No-Sail Zones’ after wind turbine breaks, falls into sea

Offshore wind developer Ørsted has asked authorities to establish no-sail zones at some of its offshore wind farms after the catastrophic failure of an offshore wind turbine at a Danish offshore wind farm, Reuters reports.

Ørsted reported on April 6th that a rotor and three blades had separated from the nacelle of one of the offshore wind turbines at its 400 MW Anholt Offshore Wind Farm. The blades and rotor fell into the sea. No injuries were reported from the accident.

As a precautionary measure, Ørsted is requesting authorities establish temporary no-sail zones at other wind farms that use the same turbines as the one that failed.

The Anholt Offshore Wind Farm was commissioned in 2013 and consists of 111 Siemens-Gamesa 3.6 MW wind turbines. Other farms using the turbines include West of Duddon Sands, Lincs, Gunfleet Sands, Burbo Bank and Walney 1 & 2, all in the UK, Borkum Riffgrund 1 in Germany, and Avedøre Holme in Denmark.

Ørsted said that it was investigating the cause of the incident and said that the no-sail zone request was “an extraordinary precautionary measure”.

It said that thus far the investigation had not pointed to a systemic cause of the issue.

Ørsted is one of the world’s leading offshore wind developers, constructing and operating offshore wind farms in Denmark, the UK, Germany, the Netherlands, Taiwan, and the US.