Wind Turbine Gearbox Condition Monitoring Round Robin Study - Vibration Analysis

Research output: NRELTechnical Report


The Gearbox Reliability Collaborative (GRC) at the National Wind Technology Center (NWTC) tested two identical gearboxes. One was tested on the NWTCs 2.5 MW dynamometer and the other was field tested in a turbine in a nearby wind plant. In the field, the test gearbox experienced two oil loss events that resulted in damage to its internal bearings and gears. Since the damage was not severe, thetest gearbox was removed from the field and retested in the NWTCs dynamometer before it was disassembled. During the dynamometer retest, some vibration data along with testing condition information were collected. These data enabled NREL to launch a Wind Turbine Gearbox Condition Monitoring Round Robin project, as described in this report. The main objective of this project was to evaluatedifferent vibration analysis algorithms used in wind turbine condition monitoring (CM) and find out whether the typical practices are effective. With involvement of both academic researchers and industrial partners, the project sets an example on providing cutting edge research results back to industry.
Original languageAmerican English
Number of pages157
StatePublished - 2012

NREL Publication Number

  • NREL/TP-5000-54530


  • condition monitoring
  • Gearbox Reliability Collaborative
  • GRC
  • wind
  • wind turbine gearbox


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