| 摘要 |
The present invention relates to a pitch system for pitching a blade of a wind turbine by means of a hydraulic fluid, comprising a manifold which comprises a hydraulic cylinder for adjusting a pitch angle of the blade and an accumulator hydraulically connected to the cylinder, the hydraulic fluid having at east one measurable property, wherein the system further comprises a testing unit adapted to measure at east one property of the hydraulic fluid in fluid communication with the accumulator. Furthermore, the invention relates to a method for measuring the property of the hydraulic fluid. |
