An Enhanced Voltage Regulation Method Based on STA–SMC and MPC Controller for SEPIC Converter
IEEE Transactions on Industrial Electronics, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1109/tie.2026.3718131
- Dergi Adı: IEEE Transactions on Industrial Electronics
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Compendex, INSPEC, Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- Anahtar Kelimeler: Hybrid control, model predictive control (MPC), single-ended primary-inductor converter (SEPIC) converter, sliding mode control (SMC), super-twisting algorithm (STA), voltage regulation
- Gazi Üniversitesi Adresli: Evet
Özet
This article presents a voltage control strategy based on super-twisting algorithm sliding mode control (STA–SMC) with model predictive control (MPC) for single-ended primary-inductor converter (SEPIC). The SEPIC converter is a fourth-order system, and voltage control is achieved in two steps: generation of the input side inductor current reference based on the output voltage error and inductor current control. In contrast to existing reference current generation approaches based on a proportional–integral (PI) controller, a STA–SMC method is proposed for the reference generation to improve the dynamic performance in this article. The current control is achieved by the proposed MPC method. Thus, a cascaded control structure that contains STA–SMC and MPC methods is obtained. The effectiveness of the proposed control structure is investigated by experimental studies that are performed under steady-state and transient conditions for both buck and boost operation. In addition, a detailed comparison with the conventional current generation (by a PI controller) and the proposed method is provided. Results show that the proposed STA–SMC–MPC controller reduces voltage deviation at least 50% and improves settling time by up to 81% during load changes. Specifically, for a load transition from 20 to 10 Ω in buck mode, the proposed controller limits the undershoot to 2.5 V with a 10 ms settling time, compared to 5 V and 32 ms for PI-MPC. These findings confirm the proposed strategy’s enhanced dynamic response, robustness to disturbances, and suitability for power electronics applications demanding precise voltage regulation.