3 3 Apparatus and method for generating virtual neutral point of three-phase three-wire system

摘要

According to an embodiment of the present invention, a method and apparatus for generating a virtual neutral point are disclosed. The method is a virtual neutral point connected to a three-phase three-wire type Y-connection circuit having a first wire, a second wire and a third wire electrically connected through a first load, a second load and a third load from a central point, respectively A generating method comprising: generating a virtual neutral point corresponding to the voltage of the center point and defined from a ground voltage; measuring a first voltage, a second voltage, and a third voltage with respect to the ground voltage on the first line, the second line, and the third line, respectively; and calculating the phase voltages respectively applied to the first load, the second load, and the third load by reflecting the virtual neutral point for the first voltage, the second voltage, and the third voltage, The first load, the second load, and the third load have the same impedance.