Condition monitoring of windturbines
First Claim
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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.
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Abstract
A method for monitoring a wind turbine is provided. The method includes defining at least one subsystem of the wind turbine and providing a simulation model for the at least one subsystem. During normal operation of the wind turbine at least an input parameter of the at least one subsystem is determined a behavior of the at least one subsystem is simulated using the at least one input parameter as an input of the simulation model. Based on the simulated behavior, it is determined, if the at least one subsystem operates within a given specification.
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Citations
18 Claims
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1. A method for monitoring a wind turbine, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for monitoring a wind turbine, comprising:
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defining a first subsystem of the wind turbine; providing a simulation model for the first subsystem; receiving, during normal operation of the wind turbine, an input signal and an actual output signal of the first subsystem; determining an expected output signal of the first subsystem using the input signal as an input of the simulation model, and mapping the input signal with a first transfer function to the expected output signal; comparing the actual output signal and the expected output signal; determining, based on the comparison between the actual output signal and the expected output signal, if the first subsystem operates within a given specification; and determining a second transfer function so that the input signal and the expected output signal substantially match, wherein comparing the actual output signal and the expected output signal comprises determining a distance between the first transfer function and the second transfer function in a function space. - View Dependent Claims (11, 12, 13)
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14. A system for monitoring a wind turbine, comprising a simulation module which is configured:
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to simulate, during normal operation of the wind turbine, a behavior of a subsystem of the wind turbine by mapping an input signal with a first transfer function to an expected output signal; to determine, based on the simulated behavior, if the subsystem operates within a given specification by comparing an actual output signal of the subsystem with the expected output signal from the simulation module, determining if the actual output signal and the expected output signal substantially match, and wherein determining if the actual output signal and the expected output signal substantially match comprises determining a second transfer function so that the input signal and the expected output signal substantially match, and comparing the actual output signal and the expected output signal comprises determining a distance between the first transfer function and the second transfer function in a function space changing the first transfer function when the actual output signal and the expected output signal do not substantially match to achieve a substantial match; and to send a message to a turbine controller of the wind turbine when the subsystem is determined not to operate within the given specification based on the changed first transfer function. - View Dependent Claims (15, 16, 17, 18)
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Specification