A controller design of current source PWM rectifier

The current source PWM rectifier with good power factor and dc current source characteristics are expected to replace the diode or thyristor on some occasions.But the state space average model of current-source PWM rectifier is a multiinput multi-output nonlinear system and the coupling between state variables exists,which make the controller’s design difficult.This paper puts forward a kind of improvement indirect current control method which based on d-q coordinate system.The strategy can achieve the dynamic response of the linear through the decoupling control in the power grid voltage balance situation.