Abstract
Gear meshing dynamic model is the most important part in the whole wind turbine system which is used to carry out operation conditions simulation in off-line case. By simulating the normal gear meshing and the gear meshing with broken teeth in wind turbine dynamic model respectively, the difference in generator current can be observed. The method we propose is to monitor the operating condition of the wind turbine based on the current transmitted to the generator end dynamically according to the meshing of the gear pair. Mechanical parameters have great influence on the system that will be transmitted to asynchronous generator, it works in a quite different approach compared with traditional method on vibration monitoring using sensors.
Highlights
The main mechanical failure [1, 2] of wind turbines occurs on two key components of gears [3] and rolling bearings [4]
From the differential equations Eq (4), two outputs can be obtained, which are the pitch line displacement caused by the meshing of the sun gear and the planetary gear, and the pitch of the pitch generated by the meshing of the planetary gear and the ring gear
Where: T is the drag torque provided by the wind turbine; ω is the drag torque provided by the wind turbine; J is the moment of inertia of the system
Summary
The main mechanical failure [1, 2] of wind turbines occurs on two key components of gears [3] and rolling bearings [4]. By arranging the vibration measuring sensor at the monitoring point for detection, the error is relatively large. It was first proposed to be used in the research direction of asynchronous generator operation monitoring and fault diagnosis [17, 18]. This method of analyzing the corresponding signals by using the characteristics of the stator current signal of the motor has been detecting faults of the generator body, such as fault diagnosis of the stator [19], rotor [20] and air gap flux of the generator. A NOVEL WIND TURBINE FAULT DIAGNOSIS METHOD BASED ON GENERATOR CURRENT ANALYSIS.
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