Nonlinear decoupling control of three-phase AC/DC voltage-source converters

Abstract

Based on the feedback linearization principle of differential geometry theory, a nonlinear decoupling control method of three-phase voltage source PWM rectifier is proposed in this paper. First, an affine nonlinear model of the three-phase voltage source PWM rectifier is set up. After verifying the linearization conditions, the nonlinear system is completely linearized by coordinates transformation and new control variables. The nonlinear feedback control law is proposed. Finally, the digital simulation results are provided to verify the high performance of the proposed nonlinear control method.