Robust Backstepping Direct Power Control of Vienna Rectifier based on Sliding-Mode Theory

Abstract

This article mainly elaborates the design of backstepping direct power controller of three-level T -type Vienna rectifier based on space vector modulation (SVM). Aiming at the problems of load fluctuation and parameter's uncertainties during operation of T -type Vienna rectifier, the sliding-mode controller and backstepping method are combined to design two state feedback controllers related to active power and reactive power. Parameters of the two coupling controllers can be designed independently according to the actual situation. The excellent dynamic performance and robustness of proposed method are proved compared with proportional-integral control (PIC) through SIMULINK software; current distortion during zero-crossing point of the Vienna rectifier is also suppressed by reactive power compensation.