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Author: search.filters.author.Khomfoi, SurinSubject: search.filters.subject.dc microgrid

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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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    A dc to dc multilevel modular capacitor clamped converter with electrical grounding isolation and bidirectional power flow for a dc microgrid application
    (2012-10-02)
    Sintupatsuk, Pongsakorn
    ;
    Khomfoi, Surin
    ;
    Paisuwanna, Prapart
    A dc to dc multilevel modular capacitor clamped converter (M <sup>2</sup>C <sup>3</sup>) with electrical grounding isolation and bidirectional power flow for a dc microgrid application is proposed in this paper. The principle of this particular M <sup>2</sup>C <sup>3</sup> is based upon volt-sec balance of capacitors connected as a modular cell in the circuit so that the M <sup>2</sup>C <sup>3</sup> can be similarly operated as a dc transformer. The M <sup>2</sup>C <sup>3</sup> can be interfaced between a battery and a dc grid. Moreover, two M <sup>2</sup>C <sup>3</sup> can be interfaced using a high frequency transformer in order to achieve grounding isolation and exchange energy between M <sup>2</sup>C <sup>3</sup>. The transferred energy would provide the fault tolerance ability in the case of a M <sup>2</sup>C <sup>3</sup> is malfunctioned. Both grounding isolation and bidirectional power flow are one of key functions for dc microgrid applications. The simulation study is performed using PSIM 9.0. Also, the 3-kw prototype is developed to investigate the notion for a dc microgrid application. © 2012 IEEE.