The increasing application of inverter-connected distributed resources to the distribution system creates a need to define improved means for integration of these resources without adversely impacting power quality or reliability. Since 2009, EPRI has been facilitating a collaborative initiative to develop standard functions and a standard language for grid integration of smart solar and storage inverters along with the US DOE, Sandia National Laboratories, and the Solar Electric Power Association. The initiative was designed around an open process and a large interest group became engaged, including inverter manufacturers, system integrators, research organizations and utilities. This paper illustrates three of the advanced inverter control standard functions that were identified using simulation of a distribution system containing large solar PV installations.
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