Predictive Direct Power Control of Three-Phase PWM Rectifier Based on Linear Active Disturbance Rejection Control

A dual closed loop for PWM rectifier, consisted of an inner instantaneous power loop and an outer dc-bus voltage loop, is presented in this paper. The inner loop adopts predictive direct power control (PDPC) and the outside one adopts linear active disturbance rejection control (LADRC) strategy. In order to achieve the expected switching voltage vectors, the instantaneous power values are forced to be equal to references at the next sampling instance in PDPC. The state space form can be established according to instantaneous active power balance equation, and then the generalized disturbance can be compensated. And the instantaneous active power reference can be achieved by LADRC structure. Finally, the presented structure is tested by simulation in Matlab/Simulink environment. And simulation results verified the feasibility and the effectiveness of the proposed system.