In the case of geared wind turbines, oil condition monitoring (OCM) facilitates the identification of wear-related damage and degradation processes in the oil. OCM can also provide valuable information about the gearbox condition in order to extend oil change intervals by monitoring the oil cleanliness [1]. As the implementation of oil sensors for OCM is in an early stage, this poster presents the results of a testing campaign on an oil sensor test bench. During this testing campaign, several types of sensors including particle counters, oil properties sensors and water content sensors are tested under several operating conditions. The results of this study show the limitations and advantages of offline and online OCM methods, which allows giving recommendations on the choice of oil sensors. Oil aged in a laboratory and oil extracted from wind-turbine gearboxes in the field are used to perform the tests and provide a deeper understanding of the oil aging process occurring in wind turbines.
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