Noise analysis method in transformer substation
A method of analysis, technology of substations
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[0055] Example one
[0056] A noise analysis method in a substation provided by a preferred embodiment of the present invention, such as figure 1 As shown, including the following steps:
[0057] Step 1: Collect device sound and perform preprocessing to obtain a sound segment signal that can accurately represent the sound information and meet system standards. The preprocessing includes pre-emphasis, frame windowing and endpoint detection in sequence;
[0058] Step 1.1: Collect the sound sequence of different devices by carrying a microphone array;
[0059] Step 1.2: Since the sound collection will be affected by various aspects, and the high-frequency part will drastically drop in the dB frequency range, so the first-order data filter is used to pre-emphasize the sound signal collected in step 1.1. The frequency spectrum of the dropped part of the sound signal is improved, thereby maintaining the flatness of the signal spectrum, ensuring that the spectrum of the entire band of the s...
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