Vibration acceleration measurement-based wind power generation unit transmission system fault alarm method
A technology for wind turbines and vibration acceleration, applied in wind turbines, monitoring of wind turbines, engines, etc., can solve problems such as insensitivity of alarms, achieve obvious alarm effects, and improve sensitivity and accuracy
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[0040] The present invention provides a method for alarming a failure of a drive system of a wind turbine generator set, which includes the following steps:
[0041] Step 1: Sampling the vibration acceleration signals of important parts of the wind turbine transmission system continuously at equal time intervals, and set the number of sampling points to N points;
[0042] Step 2: Perform de-DC processing on the sampled vibration acceleration signal according to formula (1);
[0043]
[0044] Where: y i Is the vibration acceleration signal value after removing the DC;
[0045] x i Obtain the vibration acceleration signal value for sampling;
[0046] i is the signal sampling sequence number, i=1, 2, 3,...,N;
[0047] Is the signal mean;
[0048]
[0049] Step 3: Calculate the variance σ of the vibration acceleration signal after removing the DC 2 ;
[0050] According to the definition of variance:
[0051]
[0052] Because y i Is the vibration acceleration signal after removing DC, namely t...
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