Improved Adaptive Hamiltonian Control Law for Constant Power Load Stability Issue in DC Microgrid: Case Study for Multiphase Interleaved Fuel Cell Boost Converter

Phatiphat Thounthong, Pongsiri Mungporn, Babak Nahid-Mobarakeh, Nicu Bizon, Serge Pierfederici and Damien Guilbert
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Phatiphat Thounthong: Renewable Energy Research Centre (RERC), King Mongkut’s University of Technology North Bangkok, 1518, Pracharat 1 Road, Wongsawang, Bangsue, Bangkok 10800, Thailand
Pongsiri Mungporn: Renewable Energy Research Centre (RERC), King Mongkut’s University of Technology North Bangkok, 1518, Pracharat 1 Road, Wongsawang, Bangsue, Bangkok 10800, Thailand
Babak Nahid-Mobarakeh: Department of Electrical and Computer Engineering, McMaster University, Hamilton, ON L8S 4L8, Canada
Nicu Bizon: Department of Electronics, Computers and Electrical Engineering, Faculty of Electronics, Communications and Computers, The University of Pitesti, 110040 Pitesti, Romania
Serge Pierfederici: Laboratoire d’Energétique et de Mécanique Théorique et Appliquée (LEMTA), Université de Lorraine, CNRS, LEMTA, F-54000 Nancy, France
Damien Guilbert: Groupe de Recherche en Energie Electrique de Nancy (GREEN), Université de Lorraine, GREEN, F-54000 Nancy, France

Sustainability, 2021, vol. 13, issue 14, 1-17

Abstract: The cascaded connection of power converters in a DC microgrid may cause instabilities. Indeed, power converters operating as external loads exhibit constant power load (CPL) behaviors. In this study, the design of the feedback controller of a multi–cell interleaved fuel cell (FC) step–up power circuit is based on the adaptive Hamiltonian control law. It includes two integral terms to confirm that there is no steady-state error in the DC bus voltage, and to guarantee the current balancing of each input inductor current. The design confirms that the desired equilibrium point is (locally) asymptotically stable by using the Lyapunov stability proof. The control approach is validated via digital simulations and experimental tests performed with a 2500 W FC converter supplied by an FC/reformer size of 2500 W and 50 V.

Keywords: constant power load (CPL); electric car; DC microgrid; multi–cell interleaved boost circuit; fuel cell (FC); Lyapunov stability; Hamiltonian; passivity-based controller (PBC) (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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