Helios:
mmm its part of a system i have been working on , where we have much higher voltage transmission grid that feeds most cities and we use a lower seperatly feed system for rural networks , enables generation using different more green technology for rural networks and , some beasts of highly efficient power stations for uhv grid system , basically not trying to do everything from one grid could be far far more efficient.
That sounds just like the grid we already have in the UK,
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