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Author: search.filters.author.Khomfoi, SurinSubject: search.filters.subject.fuel cell (FC)

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    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.
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    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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    Modeling and Control of Multiphase Interleaved Fuel-Cell Boost Converter Based on Hamiltonian Control Theory for Transportation Applications
    (2020-06-01)
    Mungporn, Pongsiri
    ;
    Thounthong, Phatiphat
    ;
    Yodwong, Burin
    ;
    Ekkaravarodome, Chainarin
    ;
    Bilsalam, Anusak
    This article presents a multiphase interleaved boost converter supplied by a fuel-cell (FC)/reformer power source for highly dynamic transportation applications. A control theory based on the Hamiltonian function approach is considered. Using the port-controlled Hamiltonian system, we propose simple solutions to the dynamic performance and convergence problems when an interaction occurs between the power sources and constant power loads. To corroborate the proposed control law, an FC boost converter (2.5-kW two-phase interleaved converter) is used and investigated in the laboratory. The methanol FC system is composed of a fuel reformer reactor that transforms water and methanol liquid fuel into hydrogen gas to a polymer electrolyte membrane FC stack (2.5 kW, 50 V). The studied control approach is realized by digital calculation using a MicroLabBox controller board (dSPACE platform). The simulation using the MATLAB/Simulink program and the experimental results validate that our proposed solution is an excellent control algorithm for highly dynamic power-load cycles.