[Tagging] Substation proposal approved - and a suggestion for a post-vote change

[Ole Nielsen / osm]

> 2013/10/12 Martin Koppenhoefer <dieterdreist at gmail.com>
>>
>> 2013/10/12 Ole Nielsen / osm <on-osm at xs4all.nl>
>>
>>> I propose to change the meaning of "substation=distribution" to be used
>>> only on substations at the last level of voltage transforming, thus the
>>> small street-level transformer kiosks etc supplied with medium voltage
>>> (typically 10-30 kV) and delivering low voltage power to households and
>>> small businesses.
>>
> definitely +1
>
>> IMHO the IEC are right with defining everything below 100kV as
>> distribution, I wouldn't use this given term with a different meaning.
>
> I don't agree.
>
> Imagine you find several 90 kV and 63 kV lines in such a substation
> connected with busbars.
> Then, the operator can use this stuff to make power transit between lines
> of a given power level and use transformers to transit between both 90 kV
> and 63 kV.
>
> That's transmission and not distribution obviously and it's below 100 kV.
>
> Furthermore, we can't qualify of "distribution" voltage levels which
> accept
> industrial client feeding : CERN is connected to French 400 kV (and I hope
> everyone will agree 400 kV isn't distribution).

I surely wouldn't associate CERN with "distribution". They may have their
own internal industrial distribution network but "substation=industrial"
is more appropriate for such internal facilities.

The idea behind "transmission" and "distribution" is to provide data
consumers a hint about the role of the substation without having to look
for the voltage tag (which may be missing or having multiple ;-separated
values). The 100 kV specified threshold is only a guideline and if the
mapper think that a 70 kV substation is mainly for transmission then it
may be indicated as such. Another example: 132/10 kV substations are not
uncommon in Denmark and they seem most appropriately to be considered
distribution stations.

Of course we are here talking about the final substations *for households
and small businesses* only being connected at the low voltage level, not
those feeding larger industrial customers at a higher voltage level.

I'm open to suggestions for alternatives to "distribution". Martin
suggested "local_distribution" which is a bit long but otherwise a
possibility. Some other ideas: "local" or "minor"?. I am just looking for
a way to clearly distinguish those low voltage substations from other
substations.

BTW, "transformer=distribution" is currently defined as meaning a
transformer supplying low voltage!

Ole