mansoor

Tower footing impedance of Overhead line?

1-Is there any general value of footing resistance that will be accounted in this case

or

Footing resistance will depend on soil resistivity?

2-The OHGW grounding resistance will consider, the tower structure impedance?

Status: Open Mar 05, 2018 - 11:02 PM

Transmission line

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chanda_ee

Mar 07, 2018 - 05:28 PM

dear mansoorhvdcepl kindly go through this link, u will get the ans . and yes it depends on your soil quality in your area.
http://snsce.snscourseware.org/files/...

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mansoor

Mar 07, 2018 - 05:56 PM

Dear,

In PSCAD transmission line model, we are not able to define tower footing resistance in 'transmission line segment' component. So, my question is in regards to PSCAD only.

- in lightning studies, we can model a tower and its footing resistance, which is outside the 'transmission line segment' component. Howevevr, this can be done only for few tower spans.

-for long lines, if we do not eliminate OHGW, will it experience some grounding at every tower span i.e. 350 m. What will be the value of that grounding resistance?

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chanda_ee

on 3/8/2018 3:05:10 PM | Like (0) | Report

dear mansoor_hvdcepl, could you send me the simulated file. first of all i have to check the simulated file.

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mansoor

Mar 08, 2018 - 03:57 PM

Dear Chanda_EE,

You can use any transmission segment component in PSCAD.

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chanda_ee

on 3/8/2018 7:27:38 PM | Like (0) | Report

until and unless you send me the simulated file, I am unable to rectify your problem.

mansoor

on 3/8/2018 7:32:03 PM | Like (0) | Report

This question is related to EMT theory. So, I am not sure. What file, I should send you.

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Tower footing impedance of Overhead line?

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