Condition-based maintenance of wind turbines not only involves maintenance but also encompasses servicing, inspection, measurement and evaluation of the condition of the unit. The current condition can be evaluated on the basis of machine-specific overall vibration values. Until now, overall vibration values had not been defined for wind turbines. In fact, ISO 10816-3 explicitly excludes wind power plants. The new VDI 3834 closes this gap, as shown in Sheet 1, which covers vibration values for wind turbines up to 3MW.
By Dr Edwin Becker, Head of Service & Diagnostic Centre, Prüftechnik Condition Monitoring, Germany