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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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Analysis of Control System to Prevent Collapse of Mixed-Source DC Microgrid for Industry
(2020-07-01)
Boonseng, C.
;
Kularbphettong, K.
;
Boonseng, R.
This paper presents the control of power sources by lookup table controller to maintain the voltage of critical load and to prevent the collapse of a mixed-source DC microgrid which consists of grid, diesel generators, batteries and solar cells that connect to DC bus. MATLAB is used to a simulation of the microgrid system. The experiment presents the time comparison of four types of switches including magnetic contactor, relay, solid-state relay and power MOSFET which can maintain DC bus voltage in a specified range which least effects to critical load operation. Finally, applied in the data center system of a small factory which has satisfactory results.
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Design and control of DC microgrids (DCMG) systems for improving reliability and stability of data centers
(2019-07-01)
Boonseng, C.
;
Suksawat, D.
;
Kularbphettong, K.
Distribution systems that depended on de voltages which do not have reactive power loading the lines do not need to synchronize the grid frequency and the equivalent resistance in the conductor tends to be slightly smaller. Therefore, the systems intrinsically tend to become simpler and more efficient. Microgrids and dc distribution systems applied to data centers bring a potentially higher efficiency improvement, due to the penetration of dc-based loads. The paper also examines the ability of a DC microgrid to facilitate provide high degrees of critical load availability. Relation and transfer power between grid, diesel generator and battery are presented. Using PLC and HMI helps to control the switching conditions. In order to be able to maintain the constant voltage at the DC bus at all times, without stopping to disappear or collapse.
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Enhancement of LVRT performance and alleviation of power fluctuation of DFIG wind turbine in DC microgrid by SMES
(2013-01-01)
Karaipoom, Tanapon
;
Ngamroo, Issarachai
Recently, a doubly fed induction generator (DFIG) wind turbine has been extensively paid attentions as a renewable energy source in the DC microgrid. However, the inevitable problems of DFIG wind turbine are low voltage ride through (LVRT) due to the occurrence of faults as well as the power fluctuation. To overcome both problems, a superconducting magnetic energy storage (SMES) unit which is able to provide fast control of active and reactive power, can be used. This paper applies a SMES unit to enhance LVRT performance and alleviate the power fluctuation of DFIG wind turbine in the DC microgrid. The SMES circuit is mainly composed of the DC chopper. The PI controllers of DC chopper are used to control the exchange energy between the superconducting coil and the system. Simulation study using MATLAB/SimPowerSystems ensures the SMES control effect on both enhancing LVRT performance and smoothing power fluctuation of DFIG wind turbine. © 2013 IEEE.
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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 2C 3) with electrical grounding isolation and bidirectional power flow for a dc microgrid application is proposed in this paper. The principle of this particular M 2C 3 is based upon volt-sec balance of capacitors connected as a modular cell in the circuit so that the M 2C 3 can be similarly operated as a dc transformer. The M 2C 3 can be interfaced between a battery and a dc grid. Moreover, two M 2C 3 can be interfaced using a high frequency transformer in order to achieve grounding isolation and exchange energy between M 2C 3. The transferred energy would provide the fault tolerance ability in the case of a M 2C 3 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.

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