Induced voltage on pipeline parallel to overhead conductor
Induced voltage on pipeline parallel to overhead conductor
(OP)
Hi all,
I have a problem where I need to calculate the induced voltage of a pipeline running parallel with a 34.5kV 600A unshielded transmission line (500kcmil) and the pipe is approx. 20m from the line. I have read many articles about the effects of induced voltage on pipeline but have yet to find any articles calculating the actual induced voltage. Any suggestions? Thanks..
I have a problem where I need to calculate the induced voltage of a pipeline running parallel with a 34.5kV 600A unshielded transmission line (500kcmil) and the pipe is approx. 20m from the line. I have read many articles about the effects of induced voltage on pipeline but have yet to find any articles calculating the actual induced voltage. Any suggestions? Thanks..






RE: Induced voltage on pipeline parallel to overhead conductor
This will also be somewhat dependent on the configuration of the overhead line and the current magnitude, possibly.
RE: Induced voltage on pipeline parallel to overhead conductor
RE: Induced voltage on pipeline parallel to overhead conductor
RE: Induced voltage on pipeline parallel to overhead conductor
RE: Induced voltage on pipeline parallel to overhead conductor
RE: Induced voltage on pipeline parallel to overhead conductor
RE: Induced voltage on pipeline parallel to overhead conductor
I have been studying this myself for a while and have a spreadsheet that can do excatly what you want. But as davidbeach pointed out, there will be very little induced voltage under normal balanced load conditions but there will be some, depending on how far the pipe is from the transmission line. The induced voltage is not dependant on the the pipe itself (the resulting current is if there is a closed circuit)and thus you need not worry about pipe GMR if you only wish to calculate the induced voltage.
You will need the GMR of the overhead conductors and the spacing of the conductors from each other and earth (including any overhead earth wires). As davidbeach also pointed out when the transmission line is carrying EF current then the flux enveloped by the pipe due to the current in the conductor(s) is much larger as there is no cancellation effects between the fluxes from the conductor's phases as is the case with positive sequence current.
This zero sequence mutual coupling is of more concern as part of the EF return current can also flow in the pipe.
With regards to my spreadsheet, I am willing to share it with you but it is in metric units as that is what I work with here in Australia. If you are willing to do any conversions necessary then you are welcome to it.
Regards.
RE: Induced voltage on pipeline parallel to overhead conductor
Thanks!
RE: Induced voltage on pipeline parallel to overhead conductor
ht
These were posted in oposition to the routing of a proposed 138kV line in my area.