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Mojarad, Hamed, Shayeghi, Hossein, Rahnama, Alireza. (1404). An Optimal Error-Driven Sequential Approach for the Dual-Loop Fractional-Order Control of a PFC Converter in Solid-State Transformers. سامانه مدیریت نشریات علمی, (), -. doi: 10.22098/joape.2025.17796.2399
Hamed Mojarad; Hossein Shayeghi; Alireza Rahnama. "An Optimal Error-Driven Sequential Approach for the Dual-Loop Fractional-Order Control of a PFC Converter in Solid-State Transformers". سامانه مدیریت نشریات علمی, , , 1404, -. doi: 10.22098/joape.2025.17796.2399
Mojarad, Hamed, Shayeghi, Hossein, Rahnama, Alireza. (1404). 'An Optimal Error-Driven Sequential Approach for the Dual-Loop Fractional-Order Control of a PFC Converter in Solid-State Transformers', سامانه مدیریت نشریات علمی, (), pp. -. doi: 10.22098/joape.2025.17796.2399
Mojarad, Hamed, Shayeghi, Hossein, Rahnama, Alireza. An Optimal Error-Driven Sequential Approach for the Dual-Loop Fractional-Order Control of a PFC Converter in Solid-State Transformers. سامانه مدیریت نشریات علمی, 1404; (): -. doi: 10.22098/joape.2025.17796.2399

An Optimal Error-Driven Sequential Approach for the Dual-Loop Fractional-Order Control of a PFC Converter in Solid-State Transformers

Journal of Operation and Automation in Power Engineering
مقالات آماده انتشار، اصلاح شده برای چاپ، انتشار آنلاین از تاریخ 24 مهر 1404    اصل مقاله (9.18 M)
نوع مقاله: Research paper
شناسه دیجیتال (DOI): 10.22098/joape.2025.17796.2399
نویسندگان
Hamed Mojarad؛ Hossein Shayeghi* ؛ Alireza Rahnama
Energy Management Research Center, University of Mohaghegh Ardabili, Ardabil, Iran.
چکیده
The increasing complexity of current power systems has made improving their dependability and operational efficiency a primary focus of research. The dynamic performance and adaptability of conventional low-frequency transformers equipped with tap changers are inherently limited. As an alternative, Solid-State Transformers (SSTs) are favored due to their smaller size, higher reliability, and improved controllability. However, their nonlinear behavior, numerous switching devices, and passive elements like capacitors demand advanced, high-speed, and robust control strategies to unlock their full potential. Therefore, achieving stable output voltage and regulated input current through an effective Dual-Loop control (DLC) mechanism is essential. In this study, an optimal design of the DLC strategy is proposed for a power factor correction converter, which serves as the front-end stage of an SST. This combined control scheme merges a fractional-order proportional-integral (FOPI) controller with a conventional PI regulator. The controllers are designed to maintain voltage and current ripples within acceptable thresholds, even under load disturbances and changes in system parameters. To achieve this, DLC tuning is carried out using the Coati optimization algorithm, aiming to reduce the ISTSE cost function as much as possible and improve overall system behavior. To verify the effectiveness of the proposed strategy, a thorough comparison is carried out with other control techniques, including standard single-loop control (SLC), PI-PI-based DLC, and the proposed PI-FOPI-based DLC, under different operating conditions and using various optimization algorithms. The numerical results clearly demonstrate that the proposed design significantly enhances the converter’s dynamic behavior compared to the typical SLC configuration, achieving up to 77% better performance in terms of rise time and settling time.
کلیدواژه‌ها
Dual-loop control؛ fractional order controller؛ PFC converter؛ coati optimization algorithm؛ solid-state transformer
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