LV Grid Modeling Including Consumption and Distributed PV Generation with Focus on Voltage Profile

Abstract

Distributed generation is growing rapidly and it poses challenges to grid operations, especially on LV network. A set of sample networks are created based on the Hungarian LV distribution network to study the effects of distributed generation. These models represent accurately the overall LV network structure. Thus, conclusions based on them are valid for the Hungarian LV distribution network. Consumer models are also constructed, with focus on random behavior, based on actual measurements. The model networks utilize PV generation - as this gives over 99% of the DG in Hungary. Simulations are carried out on this model set to find the limits of PV DG in the network by voltage profile, without any smart control. Overhead lines will face voltage problems - even with just a small amount of PV generation, while cable networks can keep a good voltage profile. Two simple regulation methods are also tested.