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Effect of harmonics on generator sound

Thread starter sngpl
Start date Jun 27, 2003

Status: Not open for further replies.

Jun 27, 2003

sngpl

Electrical

We have two hydroelectric generators, 80 MW each. It has been noted that the generator noise changes when the generator feeds its own station service transformer. This could be due to harmonics. The only sources of harmonics I can think of are due to the bridges in the excitation system and the battery charger. I think we can analyze it by Fourier transforms but it’s been a long time since I last did these Fourier Transforms.

How can we analyze the effect of harmonics on the generator noise?
Any good links to Fourier Transforms?