Design of an hybrid source with fuel cell and supercapacitors
Description
The design and testing of a purely supercapacitor energy storage device as auxiliary power source in electrical vehicle applications having a PEM fuel cell as main source are presented. The two control strategies are explained. The control algorithms are that fuel cell is simply operating in almost steady state conditions in order to lessen the mechanical stresses of fuel cell and to ensure a good synchronization between fuel flow and fuel cell current. Supercapacitors are functioning during absence of energy from fuel cell, transient energy delivery or transient energy recovery. The system utilizes two modules of SAFT supercapacitive storage device. This device is connected to a 42 V DC bus by a 2-quadrant dc/dc converter, and fuel cell is connected to the dc bus by a boost converter. The system structure is realized by analogic current loops and digital control (dSPACE) for voltage loops and estimation algorithms. Experimental results with a 500 W PEM fuel cell point out the slow dynamics naturally of fuel cell because of thermodynamic and mechanical operation, and also substantiate that the supercapacitors can improve dynamics and power conditioning for automotive electrical system. (author)
Abstract (French)
L'etude, le dimensionnement et le test d'un dispositif de stockage d'energie, a base de supercondensateurs, destine a fonctionner dans un vehicule a pile a combustible sont presentes dans cette these. Deux modes de commande sont detailles. Leur but est de permettre un fonctionnement en quasi-statique de la pile a combustible afin de limiter les contraintes mecaniques sur la pile en accordant les debits de gaz a la demande en courant. Les supercapacites interviennent lors du non-fonctionnement de la pile, lors de regimes transitoires ou de regimes de recuperation. Le dispositif developpe utilise deux modules de supercapacites SAFT. Il est connecte a un bus continu 42 V par un convertisseur continu-continu deux quadrants, la pile a combustible etant connectee au bus continu par un convertisseur elevateur. Le controle des courants est realise de maniere analogique. Le controle des tensions et les algorithmes d'estimation utilisent une carte numerique dSPACE. Les resultats experimentaux presentes, obtenus avec une pile de 500 W, ont souligne la lenteur naturelle des reponses de la pile a combustible et l'apport des supercapacites pour des applications automobiles. Celles-ci ameliorent grandement la dynamique et le controle energetique du systeme. (auteur)
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Additional details
Additional titles
- Original title (French)
- Conception d'une source hybride utilisant une pile a combustible et des supercondensateurs
Publishing Information
- Imprint Pagination
- 163 p.
- Report number
- FRNC-TH--14565
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 54069596
- Subject category
- S42: ENGINEERING; S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- ALGORITHMS; CAPACITIVE ENERGY STORAGE EQUIPMENT; COMPUTERIZED CONTROL SYSTEMS; DC TO DC CONVERTERS; DESIGN; ELECTRICAL TRANSIENTS; ENERGY STORAGE; EQUIPMENT INTERFACES; HYBRID SYSTEMS; PERFORMANCE; POWER CONDITIONING CIRCUITS; PROTON EXCHANGE MEMBRANE FUEL CELLS; VOLTAGE REGULATORS
- Descriptors DEC
- CONTROL SYSTEMS; DIRECT ENERGY CONVERTERS; ELECTRICAL EQUIPMENT; ELECTROCHEMICAL CELLS; ELECTRONIC CIRCUITS; EQUIPMENT; FUEL CELLS; MATHEMATICAL LOGIC; ON-LINE CONTROL SYSTEMS; ON-LINE SYSTEMS; SOLID ELECTROLYTE FUEL CELLS; STORAGE; TRANSIENTS; VOLTAGE DROP
Optional Information
- Notes
- 101 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses