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Theoretically optimal location of a distribution substation

Former Community Member
Former Community Member
Hello, 
I have the following problem with the preliminary design stage of a residential area:

The software I use can calculate a theoretically optimal location of a distribution substation for low-voltage networks. This place is calculated as a "center of power demand" or "center of gravity" of electrical consumers.

If the substation locates in this optimal place, we can design 0.4kV distribution feeders with a minimum length and power losses in low-voltage feeders are minimal. 

I understand it’s almost impossible to put it exactly there, and I consider some sites nearby. But the architect believes that this is unacceptable in terms of landscape design and wants to place the substation in a far corner.

Who should be the arbiter in this situation?  DNO representative takes a neutral position.  Local authorities are completely on architect side, they do not care that long power cables will heat the atmosphere for many years to come.

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    I think that the biggest loss is likely to be the transformer, and selecting the lowest loss type would probably be worthwhile. 2% of 500 kVA is a lot of power, and particularly the unloaded loss needs to minimised. Whilst transformer losses appear small at first view, they are significant overall in the bigger picture. Full load efficiencies are only part of the story, and the cooling fins, radiators, etc. describe the real power loss to be expected. Better core materials and design have a big impact on real power loss, although this may be 1% of the full load rating, it is a lot of money over a 50 year or more life.
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  • 0
    I think that the biggest loss is likely to be the transformer, and selecting the lowest loss type would probably be worthwhile. 2% of 500 kVA is a lot of power, and particularly the unloaded loss needs to minimised. Whilst transformer losses appear small at first view, they are significant overall in the bigger picture. Full load efficiencies are only part of the story, and the cooling fins, radiators, etc. describe the real power loss to be expected. Better core materials and design have a big impact on real power loss, although this may be 1% of the full load rating, it is a lot of money over a 50 year or more life.
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