AN APPARATUS OF CURRENT CONTROL FOR HARMONIC COMPENSATION IN GRID CONNECTED INVERTER

摘要

Disclosed is a current control device for harmonic compensation in a grid connected inverter which comprises: a basic component control unit controlling a basic component of a grid current by extracting a phase of a grid voltage from the grid voltage; and a multi-harmonic control unit generating a reference signal independent of the phase of the grid voltage by including a digital lock-in amplifier, and extracting and compensating harmonics included in a grid current by using the reference signal.