> 2013/10/12 Martin Koppenhoefer <[email protected]> >> >> 2013/10/12 Ole Nielsen / osm <[email protected]> >> >>> 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 _______________________________________________ Tagging mailing list [email protected] https://lists.openstreetmap.org/listinfo/tagging
