Open AccessNonlinear Model Based Single-Loop Control of Interleaved Converters for a Hybrid Source System
Author(s) -
Warit Thammasiriroj,
Viboon Chunkag,
Matheepot Phattanasak,
Serge Pierfederici,
Bernard Davat,
Phatiphat Thounthong
Publication year - 2016
Publication title -
ecti transactions on electrical eng. / electronics and communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.148
H-Index - 7
ISSN - 1685-9545
DOI - 10.37936/ecti-eec.2017151.171282
Subject(s) - converters , interfacing , hybrid power , control theory (sociology) , flatness (cosmology) , voltage source , computer science , hybrid system , controller (irrigation) , control system , power (physics) , electronic engineering , engineering , voltage , electrical engineering , control (management) , agronomy , physics , cosmology , quantum mechanics , artificial intelligence , machine learning , computer hardware , biology
Generally, fuel cell (FC) power supplies cannot respond fast enough to dynamic load requirements. This research presents an energy management system for hybrid power sources in dc distribution systems. A supercapacitor (SC) module was designed to be the second power source in order to supply energy in transient, which can respond well to dynamic loads. In terms of circuits, a two-phase parallel boost converter was connected to each power source for regulating the output voltage. The interleaved technique was applied for reducing the current ripples of the sources. Flatness control, which is a nonlinear estimation technique, combined with a single-loop control strategy is proposed to control the system and it responds faster than multiple-loop controls. In this research, it included a hybrid system of two power sources namely a 500-W fuel cell emulator and a 165-F supercapacitor module, each connecting to a two-phase interleaved boost converter. The control algorithm for the hybrid system was developed and validated by the MATLAB-Simulink interfacing with a dSPACE 1103 controller card. The experimental results showed the rapid response of the proposed system to the dynamic load requirement. This confirmed that the single-loop flatness control is a potential algorithm that offers stabilization of the hybrid system.