Khomfoi, Surin

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Khomfoi, Surin
Alternative Name
Khomfoi, S.
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Email
surin.kh@kmitl.ac.th

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    Item type:Publication,
    Hamiltonian-Energy Control Law for Fuel Cell/Supercapacitor Hybrid Source to Solve Stability Issues in DC Distributed System
    (2023-01-01)
    Mungporn, Pongsiri
    ;
    Khomfoi, Surin
    ;
    Pierfederici, Serge
    ;
    Nahid-Mobarakeh, Babak
    ;
    Bizon, Nicu
    The new control law of a supercapacitor (SC) based storage device combining a proton exchange membrane fuel cell (PEMFC) as a hybrid power plant is presented in this paper. To realize this goal, a Hamiltonian control law (or an interconnection and damping assignment passivity-based control IDA-PBC) is proposed. The paper deals with the new control algorithm to stabilize FC/SC hybrid system under constant power load stability issue in dc distributed network. To validate the proposed control approach, a hardware system is implemented with a high-performance microcontroller (CPU 64 bits, dual-core, 2 GHz). Also, the dc microgrid used in experimental test rig consists of a PEMFC of 2500 W, 50 V and a supercapacitor module of 188.88F 51.3V. The Experimental results show that the proposed controller has excellent control performance during a load-drive cycle under constant power load condition.
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    Item type:Publication,
    Hamiltonian-Based Approach to Enhance the Stability of Hybrid Fuel Cell and Supercapacitor Sources
    (2025-01-01)
    Mungporn, Pongsiri
    ;
    Kamnarn, Uthen
    ;
    Yodwong, Burin
    ;
    Khomfoi, Surin
    ;
    Pierfederici, Serge
    This article aims to study an improved large-signal stability for fuel cell (FC) and supercapacitor (SC) hybrid sources, employing the enhanced Hamiltonian control law. This novel approach addresses the inherent challenges in the dynamic operation of such hybrid systems, characterized by rapid load changes [i.e., constant power load (CPL)] and energy fluctuations. Grounded in energy-based control theory, the Hamiltonian control law accurately manages the energy exchange between the FC, SC, and external load aiming to improve system stability and response efficiency. A comprehensive test bench setup, including a real FC, an SC bank, and programmable loads to simulate the electrical load (i.e., CPL, constant resistive load, and constant current load), was developed to evaluate performance under various operational conditions. The results demonstrate that Hamiltonian-based control significantly enhances the system’s damping properties, ensuring a smoother response to load variations and enhanced stability across different scenarios.