MHI Vestas finds root cause of August 4 turbine prototype incident

03.11.2017

An expansive investigation, conducted by an independent investigator, has concluded that the August 4 prototype incident in Østerild, DK was caused by a faulty component that was damaged during installation within the prototype’s converter module, and that the procedure was unique to a prototype environment.

The root cause report concluded that the component, a standard industry component with a solid track record, was added solely as part of testing the prototype’s future upgrade to 9.5 MW. As such, none of MHI Vestas’ turbines currently in operation or under construction are at risk.

Torben Larsen, MHI Vestas Chief Technology Officer, said, “The incident on August 4 occurred as a result of testing that was directly related to the turbine’s future upgrade to 9.5 MW. While unfortunate, the situation was handled safely and professionally by our technicians on site.”

The company notes that the Østerild prototype did satisfy the requirements for the 9.5 MW type certificate prior to the incident, and that plans for building a new prototype are still being discussed.

Larsen concludes, “Since August 4, we have been in frequent communication with our customers and have worked tirelessly to find the root cause and implement the right mitigation actions. We are confident that all procedures and processes in relation to this have been thoroughly and properly updated.”

Source: MHI Vestas