Discrete-time super-twisting sliding-mode control applied to a DSTATCOM-based voltage regulator for a self excited induction generator

This paper proposes a discrete-time super twisting sliding mode control (DSTSMC) based on state predictive observer for voltage regulation of a distribution static converter reactive (DSTATCOM) plan with na isolated self-excited induction generator (SEIG). The state predictive observer estimates the state variables of the system one step ahead, so that the discrete-time sliding mode controller generates the control signal one steap ahead as well [l]-[2]. Therefore, this approach compensates the time delay of DSTSMC, and it guarantees that the present control signal operates the present SEIG-DSTATCOM system. Thus, the system will have greater robustness with varying load. The proposed algorithm is based on a DSTSMC, which is a great driver. The analysis of the proposed scheme is caried out in the discrete-time domain. Simulation and experimental results are presented in order to demonstrate the proposed algorithm.