Novel control method and system for three-phase voltage type AC/DC converter with nonlinear load

The invention belongs to the technical field of power electronics, and discloses a novel three-phase voltage type AC/DC converter control method and system, and the method comprises the steps: obtaining the phase voltage and line current of an AC side, and the output voltage of a DC side; performing coordinate transformation on the phase voltage and the line current value of the alternating current side to obtain direct-axis components and quadrature-axis components of the voltage and the current in a synchronous coordinate system; based on a homeomorphic transformation energy function model of the three-phase voltage type AC/DC converter, establishing a system model of the three-phase voltage type AC/DC converter according to the acquired circuit data; aiming at a state variable and a disturbance quantity in the established system model, controlling the state variable by using a sliding mode controller based on a disturbance observer; obtaining a sliding mode surface and a sliding mode control law of sliding