Smart inverter volt/var control functions for high penetration of PV on distribution systems

Small- and large-scale wind and solar photovoltaic (PV) generation systems are interconnecting to the distribution system at a rapid pace. Penetration limits are often imposed due to the impact these additional distributed resource can have on voltage. In order to accommodate high penetration scenarios without impacting power quality or reliability, additional control functions must be utilized. A recent industry collaborative effort has identified key functions that allow these additional resources to coordinate with grid operations and provide a more grid-friendly response. This paper addresses one of these functions, inverter volt/var control. Simulations are performed to illustrate the effectiveness of this type of control for PV deployment on the distribution system.