Continuous Nonsingular Terminal Sliding Mode Control of DC-DC Boost Converters Subject to Time-Varying Disturbances

• Published in: IEEE transactions on circuits and systems. II, Express briefs Vol. 67; no. 11; pp. 2552 - 2556
• Main Authors: Wang, Zuo, Li, Shihua, Li, Qi
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.11.2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; continuous nonsingular terminal sliding mode control (CTSMC); Control methods; Control systems design; Converters; Data integration; DC-DC boost converter; Distributed generation; disturbance observer; Disturbance observers; Electric potential; Load fluctuation; Power system stability; Sliding mode control; Stability analysis; Switches; time-varying disturbances; Tracking control; Transient response; Voltage; Voltage control; Voltage converters (DC to DC)
• ISSN: 1549-7747; 1558-3791
• DOI: 10.1109/TCSII.2019.2955711

DC-DC converters work as one of the crucial components in DC microgrid intergraded power systems. In this brief, the robust output voltage regulation problem of DC-DC boost converter system is addressed by using a continuous nonsingular terminal sliding mode control (CTSMC) technique based on finite-time disturbance observer. By integrating the disturbance estimations into the controller design, an improved sliding mode control (SMC) approach is developed to achieve better voltage tracking performance. The proposed control method admits the properties of fast transient responses, strong suppression ability against time-varying disturbances and small steady state oscillations of output voltage. Experimental results in the presence of both load variations and supplied voltage fluctuations are provided to validate the effectiveness of the proposed algorithm.