Transformer Partial Discharge UHF Signal Denoising Method Based on Improved Variational Mode and Singular Value Decomposition
A singular value decomposition and partial discharge technology, applied in the direction of instruments, measuring electricity, measuring electrical variables, etc., to achieve the effect of low distortion, low distortion, and stable denoising effect
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[0033] Based on the improved variational mode and singular value decomposition, the transformer partial discharge UHF signal denoising method includes the following steps:
[0034] Step 1: Perform partial discharge detection on transformer oil-paper insulation by UHF detection method, obtain UHF partial discharge signal, and calculate the kurtosis value of the pulses that make up the signal.
[0035] Step 2: Take the ratio of the relative amplitude error and the waveform similarity coefficient as the fitness function of the particle swarm optimization algorithm, and use the particle swarm optimization algorithm to optimize the parameters of the variational mode decomposition algorithm to obtain the number of decomposition modes.
[0036] Step 3: Perform variational modal decomposition on the UHF partial discharge signal. The parameters are obtained by optimizing the parameters in step 2. The modal functions are decomposed and the kurtosis values of all modal functions are cal...
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