We are receiving 3 phase current readings from Induction motor using CT sensors. I am not aware of what processing is being done on the spot. My job is to do Motor Current Signature Analysis on it using python. But the currents have weird spikes everywhere. Sampling frequency is 6500, Fundamental Frequency = 50Hz
Plot of 1000 records from phase 1.
The Amp vs Freq plot
Tried PSD using welch transform:
Thought maybe welch transformation shows the peak at 50Hz so its working but then tried adding a frequency of 500Hz to it and it didn't show up on the plot.
Also tried using wavelet transformation to remove noise but the results are the same. At this point I am not sure how to proceed. Any suggestions are welcome. Thank you.