Decoupling Strategy Based Control of a Single Phase Inverter in DQ Rotating Frame for Standalone Application

Decoupling Strategy Based Control of a Single Phase Inverter in DQ Rotating Frame for Standalone Application

In this paper, input-output decoupling strategy by state feedback in DQ rotating frame is proposed for a singlephase inverter. Controlling the Single phase inverter in DQ rotating frame facilitates controller design; it makes possible using control techniques of dc-dc converter. The mathematical model of the single phase inverter in DQ rotating frame has highly coupling between axes which complicates the controller design. We present decoupling control strategy which decouples the mathematical model and converts it to two systems having two poles at the origin. Then, a compensator is inserted in the inputs paths to constitute a standard second order system whose transient response is easily adjustable. Finally, an adaptive controller is implemented to neutralize the effects of any disturbances on load voltage. The results confirm accuracy and efficiency of the proposed controller.