Re: [Tagging] power lines/cables power

Tue, 17 Nov 2020 17:41:57 -0800

On 15/11/2020 19.17, François Lacombe wrote:

Le dim. 15 nov. 2020 à 16:45, André Pirard <[email protected]> a écrit :
Hi,

A group of friends were discussing the first electricity power link between Germany and Belgium.
And I was kinda proud to show them this where the only line across the border clearly shows.
Well done, guys (and gals?)!

Way 578137663

Tags 7

  • cables=1
  • circuits=1
  • frequency=0
  • location=underground
  • name=Alegro Interconnector
  • power=cable
  • voltage=320000
Their concern was interstate power transfers and a maximum of 7,5 GW was mentioned (more than the 6 GW Belgian deprecated nuclear capacity, effectively running at 4,5 GW).
So then I was surprised that a power cable or line does not indicate that power.
I looked trough the wiki and all I found as power was an unsuitable generator:rating:...
So, as power:power=* seems weird, I added power:maximum=7.5 GW, allowing for power:mean=* or he like.
As I don't want to get into propositions, I let specialists discuss that.
Let me know if and how I should change that tag.

Envoyé de mon immobile Thunderbird, et sans virus non plus grâce à seulement Ubuntu,

All the best,

André.

On 15/11/2020 19.17, François Lacombe wrote:

Hi André,

That's an interesting question.
Power transformers can have rating=* to state how many power they can transmit.
I see no problem to add it to a power relation like the one involving the line you mention

Can you explain the difference between your value (7.5 GW) and the value already visible on the relation (1 GW) please?

Difference between rating on a power=line/cable and rating on a power relation is a follow:
- On a line/cable, it's the maximum capacity the line/cable is designed for
- On a relation, it's the rating the whole link is operating at

Power circuits relations :

All the best

François

Haille François,

Merci pour ta réponse.
So, I was told that 7,5 GW rating by an ALEGrO engineer but I didn't see it on OSM. He didn't mention 1 GW.
So I looked all over the wiki.
Passing an accepted proposal that should say that it is overridden by another one, typical wiki, I saw no mention of power rating except for generators. And that cable has dead ends.
And in the proposal you show, I see no mention of power rating either, esp. in the relation.

A typical OSM browser needs to be an expert already to know how to look at tags and do so.
Let alone guessing that what he does not find could be in a relation.
Furthermore, I don't see at all how a relation could indicate the operational power ratings of branches.

All in all, I continue to believe that a cable or line should indicate their power ratings.
Let's be nice to the map users who were refused a F1=Help by Tom Hughes.
So, so, so, I have made the cable nice tags:

power:maximum=7.5 GW
power:used=1 GW

Quite self-describing and friendly.
Please discuss this matter and warn me of any change.

All the best,
Cordialement,

André. 

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