Impact of savica hydro power plant operation on voltage quality and practical experience in implementing new volt/VAR control system architecture

Distributed generation (DG) in distribution networks has potentially a strong influence on quality of operation especially in combination of low load consumption and high production. High voltage levels usually go hand in hand with reverse power flow, as energy from DG is pushed further up even into transmission network. Since the distribution networks are primarily designed to accept power from transmission network, that kind of operation is therefore rarely foreseen. Article deals with practical experience on active network voltage management due to impact of the Savica hydro power plant (HPP) in Bohinj region during stand-by supply.