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This paper proposes a method of stabilizing a point of common coupling (PCC) voltage using an autonomous Volt-VAR curve 

change in smart inverters. When the interconnection capacity of distributed energy resources rapidly increases, the problem of a 

reverse power flow occurs and the PCC voltage becomes unstable. The smart inverter which is a grid-connected inverter for 

distributed energy resources performs Volt-VAR control in order to stabilize the unstable PCC voltage. The smart inverter 

autonomously changes the Volt-VAR curve according to the PCC voltage. The smart inverter uses Volt-VAR curve with a larger 

slope if the PCC voltage is not stabilized when the Volt-VAR curve with a small slop is used. The Volt-VAR curve is maintained 

if the PCC voltage is stabilized using the Volt-VAR curve. The validity of the proposed method is verified by the simulation results 

and experimental results.