Adaptive super‐twisting sliding mode control of three‐phase power rectifiers in active front end applications. Issue 10 (3rd May 2019)

• Record Type: Journal Article
• Authors: Luo, Wensheng; Zhao, Tongyu; Li, Xiaolei; Wang, Zhenhuan; Wu, Ligang
• Is Part Of: IET control theory & applications. Volume 13:Issue 10(2019)
• Page Start: 1483
• Page End: 1490
• Publication Date: 2019-05-03
• Subjects: closed loop systems -- observers -- electric current control -- robust control -- power convertors -- power grids -- voltage control -- nonlinear control systems -- control system synthesis -- variable structure systems -- Lyapunov methods; closed‐loop system -- grid phase currents -- ASTA‐based controllers -- inner control loop -- desired value -- proportional controller -- outer control loop -- inner loop -- grid phase current tracking loop -- outer loop -- dc‐link capacitor voltage regulation loop -- control loops -- super‐twisting algorithm -- three‐phase two‐level grid -- robust control approach -- active front end applications -- three‐phase power rectifiers -- adaptive super‐twisting sliding mode control -- linear proportional–integral control method; Control theory -- Periodicals; Automatic control -- Periodicals; 629.8312
• DOI: 10.1049/iet-cta.2018.6141
• Languages: English
• ISSNs: 1751-8644

Abstract

Abstract : A robust control approach for three‐phase two‐level grid‐connected power converters using an adaptive super‐twisting algorithm (ASTA) is studied. A cascaded structure of the proposed control method is employed, which consists of two control loops, the dc‐link capacitor voltage regulation loop (outer loop) and the grid phase current tracking loop (inner loop). In the outer control loop, a proportional controller using H ∞ technique is considered, which is designed to regulate the dc‐link capacitor voltage to some desired value. An extended state observer used to asymptotically estimate the external disturbance is integrated into the outer control loop. For the inner control loop, two ASTA‐based controllers are implemented that force the grid phase currents to their desired values in finite time. Lyapunov analysis is provided to show the finite time convergence of the closed‐loop system. With the help of ASTA, a priori knowledge of the upper bounds of the derivative of the disturbances is not required. Illustrative simulation results in comparison with the linear proportional–integral control method are provided to demonstrate the effectiveness and robustness of the proposed ASTA, in the presence of load variation and parametric uncertainty.