Fault diagnosis method of transformer lightning Impulse based on big data
A lightning shock and transformer technology, applied in the direction of testing the dielectric strength, etc., can solve the problems of consuming a lot of time, manpower and material resources, unable to determine the location of the fault in the transformer, and unable to reflect the fault time
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[0018] Such as figure 1 As shown, a fault diagnosis method for transformer lightning impulse based on big data includes the following steps:
[0019] Step 1): Collect the historical data of the transformer lightning impulse withstand voltage test. For example, the sampling frequency of the head-end voltage and neutral point current data in the test is 100MHz, and the number of data sampling points recorded for 200μs is 20,000 points, and the lightning is drawn according to the data of the sampling points The voltage waveform at the head end of the transformer winding under the impact is as follows: figure 1 , draw the neutral point current waveform as figure 2 . According to formula 1, fast Fourier transform is performed on the head-end voltage data and neutral point current data measured by the test respectively, where x(n) is discrete signal data, such as voltage or current sampling data, and X(k) is Fast Fourier transform data of the signal, is the kernel function of ...
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