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Message
re: Interesting graphic on number of power poles damaged by Ida compared with other hurricanes
Posted on 9/15/21 at 6:28 pm to ibldprplgld
Posted on 9/15/21 at 6:28 pm to ibldprplgld
quote:
instead of making the infrastructure improvement to bury the lines
Not feasible at all. Not for distribution lines. Wires run on the poles are not insulated. That is by design. If cables are put in the ground they would have to increase the size of the cables and drop the voltage that they are carrying on them. Which then would increase the power needed to generate enough power. And that’s not including the shitload of new transformers that would need to be installed. One other thing. Finding a fault in a buried cable is challenging to pinpoint while you can see where the problem is with above ground lines. Like I said. It is really not feasible to even contemplate doing this. Outage times would triple if not more when the power goes out. I have spent plenty of hours inside manholes making splices on new cables that had to be replaced
4
Posted on 9/15/21 at 6:31 pm to Miketheseventh
quote:
I have spent plenty of hours inside manholes
Posted on 9/15/21 at 7:00 pm to Miketheseventh
quote:
Not feasible at all. Not for distribution lines. Wires run on the poles are not insulated. That is by design. If cables are put in the ground they would have to increase the size of the cables and drop the voltage that they are carrying on them. Which then would increase the power needed to generate enough power. And that’s not including the shitload of new transformers that would need to be installed. One other thing. Finding a fault in a buried cable is challenging to pinpoint while you can see where the problem is with above ground lines. Like I said. It is really not feasible to even contemplate doing this. Outage times would triple if not more when the power goes out. I have spent plenty of hours inside manholes making splices on new cables that had to be replaced
Nah man, you can totally just stick some extension cords 6 inches in the ground with a cable plow. Hell, you can get bare copper wire and the mud will insulate it. It’s out of sheer greed that they don’t do this since once every 5-15 years a big enough storm comes through to knock 10’s of thousands of poles down.
Posted on 9/15/21 at 7:51 pm to Miketheseventh
quote:
Not feasible at all. Not for distribution lines. Wires run on the poles are not insulated. That is by design. If cables are put in the ground they would have to increase the size of the cables and drop the voltage that they are carrying on them. Which then would increase the power needed to generate enough power. And that’s not including the shitload of new transformers that would need to be installed. One other thing. Finding a fault in a buried cable is challenging to pinpoint while you can see where the problem is with above ground lines. Like I said. It is really not feasible to even contemplate doing this. Outage times would triple if not more when the power goes out. I have spent plenty of hours inside manholes making splices on new cables that had to be replaced
It’s possible, just expensive. And the O&M difference is negligible. I jus did a pull plan for a 325 mile 345kV dual line. All buried.
As far as finding issues. You bury a fiber line with it and the line is spliced in vaults. You can actually ID issues pretty well between vaults which is only about 3000’.
But you’re looking at $8-12M per mile in an urban environment with a mixture of HDD and open trench.
This post was edited on 9/15/21 at 7:56 pm
Posted on 9/16/21 at 7:02 am to Miketheseventh
quote:
Not feasible at all. Not for distribution lines. Wires run on the poles are not insulated. That is by design. If cables are put in the ground they would have to increase the size of the cables and drop the voltage that they are carrying on them. Which then would increase the power needed to generate enough power. And that’s not including the shitload of new transformers that would need to be installed. One other thing. Finding a fault in a buried cable is challenging to pinpoint while you can see where the problem is with above ground lines. Like I said. It is really not feasible to even contemplate doing this. Outage times would triple if not more when the power goes out. I have spent plenty of hours inside manholes making splices on new cables that had to be replaced
Ive also read that ground water would be a huge problem, leaking into the lines. Then at that point, as someone pointed out, it would be a nightmare determining where the problem is. Simply not feasible for may reasons to include also astronomical costs.
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