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Anonymous Poster #1

How to Calculate or Select Anti-vibration Dampers for Overhead Lines?

03/12/2016 8:00 PM

Hello everyone. I'm looking for some standard or some book that tells me how to select anti-vibration dampers for overhead lines, especially in distribution systems.

I was reviewing IEE Std664-1993, IEEE 563-1978 and IEC 61897-1998 but these standards only refer to laboratory tests, but don't specify the calculation dampers.I would like to know how to calculate the number of dampers, how to select the type of damper (spiral, stockbridge, etc), the damper position, etc

These dampers will be for a medium voltage overhead line, for long spans. At the moment I only know that the frequency of wind-induced vibration is calculated as: fs=0.0185*V/D; And the natural frequency is calculated: fn=1/(2*L)*√(To*g/Wc). Equating these two frequencies, I can calculate the span from which it is necessary to use damper to avoid resonance. But this is insufficient.

Is there any standard, bulletin or any bibliographic reference of how to do this calculation?

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#1

Re: How to calculate or select anti-vibration dampers for overhead lines?

03/12/2016 8:07 PM

Did you try searching for them?

Really! Ask a supplier to educate you.

Or go here and search.

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#2
In reply to #1

Re: How to calculate or select anti-vibration dampers for overhead lines?

03/13/2016 2:33 PM

GA from me for plugging our products.

It's so much easier when the manufacturer provides enough information to actually calculate the install points of the product.

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#3
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Re: How to calculate or select anti-vibration dampers for overhead lines?

03/13/2016 8:21 PM

No worries.

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Re: How to calculate or select anti-vibration dampers for overhead lines?

03/13/2016 8:45 PM

The trolls are out tonight.

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#5

Re: How to Calculate or Select Anti-vibration Dampers for Overhead Lines?

03/13/2016 11:06 PM

It's been decades since I worked in that field, and then as an engineer for a tower manufacturer not a line designer. Does EPRI still exist? If so, they probably could provide some guidance. Also, the manufacturers were mentioned--use them.

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#6

Re: How to Calculate or Select Anti-vibration Dampers for Overhead Lines?

03/13/2016 11:31 PM

Ok, using the CR4 mail system I have also mailed the OP a detailed selection guide so that should clear things up.

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#7
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Re: How to Calculate or Select Anti-vibration Dampers for Overhead Lines?

03/13/2016 11:40 PM

I have consulted the Man Card revocation council, and since you did a good deed, we have elected to reinstate your Man Card.

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Re: How to Calculate or Select Anti-vibration Dampers for Overhead Lines?

03/14/2016 2:21 PM
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