Analysis Of Vibration Characteristics For Large Scale Variable Speed And Variable Pitch Wind Turbine Transmission System

Wind turbine transmission system is easy to occour failure. So the analysis of mechanical characteristics and vibration of gearbox under the running conditions is necessary for determining its operation status and resolving the problems early.In this paper, two kinds of 1.5 MW large-scale wind turbines are researched, and the operation performance and vibration characteristic of the transmission system is analyzed based on the actual operating datas and measured vibration signals. The main research works are:1) The gearbox vibration characteristics under different operating conditions are analyzed and the impact of the variable-speed process on the gearbox resonance is researched; 2) The non-linear characteristic of the gearbox vibration signals is quantitatively studied and its'changement is discussed.3) Based on the operating condition data, the transmission system mechanical performance was analyzed.