Abstract :
Equilibrium between MV and LV grids is an important parameter of European-like grids. As new use of electricity develops quickly, this paper analyse the advantages and drawbacks in modifying the voltage margins to LV consumers. The aim is to quantify the physical impact on grid length, number of substations and losses. The analysis is based on a geometric model with proposed parameters supposed to be representative of four typical dwelling configurations. Main conclusion is that when density is high enough, building strong grids is fine, because it reduces losses for low costs. But when density is lower, it is not worth making too long grids with too many substations. To do so, sufficient voltage margins have to be dedicated to LV grid development.
