Hosting capacity of LV distribution grids for small distributed generation units, referring to voltage level and unbalance

摘要

This paper revisits the mechanism of overvoltage and voltage unbalance production in the context of the connection of small single-phase DG units to LV distribution grids. Based on quite simplified models of typical LV distribution feeders, the phenomenon is illustrated and quantified, through the introduction of a new index (distribution factor). Finally, some mitigation solutions are investigated.