Patent ID: 8249852
Filing Date: 2012-08-21
Classification: F03D,F05B,G05B,Y02E

Abstract:
1. A method for monitoring a wind turbine, comprising: defining a subsystem of the wind turbine; providing a simulation model for the subsystem, wherein the simulation model comprises a transfer function of the subsystem; determining, during normal operation of the wind turbine, an input parameter of the subsystem; simulating a behavior of the subsystem using the input parameter as an input of the simulation model, and mapping the input parameter with the transfer function; determining, based on the simulated behavior, if the subsystem operates within a given specification by comparing an actual output signal of the subsystem with an expected output signal from the simulation model; and modifying the transfer function when the subsystem is not operating within the given specification so that the actual output signal and the expected output signal substantially match, wherein the modified transfer function represents a drift in a behavior of the subsystem.