Library filed under Safety from Denmark

Blades fly off runaway wind turbine

The blades and gearbox have been spun off a wind turbine in western Jutland after a malfunction allowed it to reach to dangerous speeds in high winds. ..."We cannot get close to it until the wind dies down,” Oluf Jakobsen, from the local Morsø municipality  explained on Friday morning. “There’s nothing we can do but sit and wait for the outcome." 
16 Jan 2015

Wind turbines certified despite construction error

A construction flaw in the foundations of many sea-based wind turbines was not discovered by inspectors who approved the structures' operation One of the most common foundations for sea-based wind turbines has a critical flaw but was nonetheless approved by a Nordic certification company, reports trade journal Ingeniøren. ...‘It's something no one could foresee and can give any engineer nightmares,' he said.
7 Apr 2010

Two wind turbines self-destruct in one week

Wind turbine blades rip loose near Esbjerg and southwestern Sweden, one landing on a hiking path A malfunction on a Vestas wind turbine in the town of Falkenberg on Sweden's southwest coast could have resulted in tragedy, as one of the structure's large blades flew off and landed on a track used by hikers.
3 Nov 2009

Final report on investigation of a catastrophic turbine failures, February 22 and 23, 2008

Endelig_redeg%c3%b8relse_for_haveriforl%c3%b8b_ved_halling_og_sidinge2_thumb Following the catastrophic failure of two Vestas wind turbines on Feb 22 and 23, 2008, the Danish energy agency requested an investigation into the events. A report was produced by engineers at Risø DTU. Below is the report translated into English. The original report, in Danish, can be accessed by clicking on the link below. A video of one of the failures can be seen here: . It is important to note that the debris from the first turbine failure which occurred on February 22 spread as far as 700 meters (2200 feet) away. Risø DTU is formerly a government research institution under the Danish Ministry of Science, Technology and Innovation.
1 Dec 2008

Wind turbine collapse under investigation

On February 22 a 600 kW Nordtank wind turbine at Halling in eastern Jutland experienced a so called runwaway event causing its blades to spin out of control. Minutes later the blades collided with the tower and caused the turbine to collapse. In an unrelated event at Vig in Odsherred a Vestas V47 600kW wind turbine lost a blade. In both cases, Vestas assume that human errors in service and maintenance caused the events, but points out that they are in process of finding the accurate causes.
27 Feb 2008
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