Multilevel Voltage Control In Power Distribution Networks

The paper investigates problem of voltage control in power distribution networks. The negative factors contributing to the voltage deviation at consumers’ connection points are analyzed. It’s shown that voltage control using only on-load tap changers on primary substations can be insufficient in case of long-length and heavy loaded feeders. Paper describes conditions when booster transformers are to be installed and conditions when can be effectively used local voltage control on distribution transformers. Conclusions are made about the need of using various means of voltage control on different network levels depending on network structure, load flow parameters and time-domain voltage profiles.