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In a world widely using wind turbines, the frequency converter is connected with the generator to obtain power grid-connected frequency, which makes their electric power quality weaker than that of conventional synchronous generators. Some researches apply a driveline at the high speed end of the gearbox in wind turbines with a continuously variable transmission (CVT), which can provide the constant...
This paper investigate an asymmetric support vector machine approach for wind turbine hydraulic pitch systems. Hydraulic pitching system in the wind turbine is critical for energy capture, load reduction and aerodynamic braking. Its reliability and maintenance is thus of high priority. The fault of cylinder internal leakage is studied in this paper. The fault and not-fault conditions for the internal...
In view of problems arising from the grid-connected wind turbine with the frequency converter, we propose a conceptual design of grid-connected wind turbine based on speed regulating differential mechanism (SRDM). The SRDM regulates its output speed and torque self-adaptively referring to wind rotor and makes the synchronous generator (SG) keep a constant speed to output electricity in steady frequency...
The state-of-the-art advancement in wind turbine condition monitoring and fault diagnosis for the recent several years is reviewed. Since the existing surveys on wind turbine condition monitoring cover the literatures up to 2006, this review aims to report the most recent advances in the past three years, with primary focus on gearbox and bearing, rotor and blades, generator and power electronics,...
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