Research on theoretical line loss calculation of low-voltage power distribution area in Shanghai

On the basis of analyzing and comparing current theoretical line loss calculation of low-voltage power distribution area, back/forward sweep algorithm is selected and improved by considering the influence of power loss correction from node voltage and introducing three-phrase unbalance factor to branch shape factor. It is verified that the improved algorithm has higher accuracy and applicability in comparison of equivalent resistance algorithm and traditional back/forward sweep algorithm with 20 randomly selected computable distribution areas, which contributes to the task of further theoretical line loss calculation of low-voltage power distribution area in Shanghai.