Apparatus and Method for reducing harmonic waves in grid-connected inverter

摘要

According to an embodiment of the present invention, an apparatus for reducing an output current harmonic wave of a grid-connected inverter comprises: a distortion current detecting function generation unit for detecting inverter phase current of a grid-connected inverter and a phase of grid voltage, and generating a distortion current detecting function of each phase of the grid-connected inverter by using detected information; and a current control unit for controlling an operation of the grid-connected inverter to output alternating current from which a direct current component including harmonic current is removed in a transformation terminal of the grid-connected inverter by using the distortion current detecting function.