Abstract
This invention discloses a three-phase feedforward inductive current control device and the control method thereof, which uses parallel connection of three-phase inverter and DV voltage source to output three-phase current. Filtering circuit filters noise of three-phase current and corrects power factor of three-phase voltage in order to output inductive current to power grid. The AC feedback circuit outputs feedback current and feedback voltage, DC feedback circuit receives DC voltage signal, and micro-processing circuit corrects feedback current, feedback voltage, and DC voltage signal according to feedforward inductive current control method in order to get estimated current variance and determine the duty ratio of controllable switch according to three-phase duty ratio control algorithm. This invention considers inductive current variation for improving conventional SVPWM limitation of false d-q conversion from three-phase unbalance, current harmonic, and control-delay.