Active damping control device for LCL filtering PWM current converter

The invention discloses an active damping control device for an LCL (Lower Control Limit) filtering PWM (Pulse-Width Modulation) current converter, which is improved to solve the problem that an additional sensor is required to be introduced for active damping control, and a current control structure is innovated. The invention designs a novel AC-side current feedback compensation damping control mode based on a double proportional control module and a band-pass filter. Through current on the AC side, the controlled quantity of the active damping control device is compensated. Firstly, the method is taken as active damping control without additionally arranging a damping resistor and then directly compensates through the current on the AC side, so that the additional sensor is not required to be arranged. The active damping control device has the benefits that on the basis of resonance problem that an LCL filter is restrained to be introduced, the practical damping resistor and the additional sensor are not required to be additionally arranged, so that both the efficiency and the cost of systems can be improved to a certain degree.