Design of a Fuel Cell Power Conditioning System for Online Diagnosis and Load Leveling
Author(s) -
Thanh-Tuan Nguyen,
Van-Tuan Doan,
Woojin Choi
Publication year - 2016
Publication title -
journal of power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.23
H-Index - 33
eISSN - 2093-4718
pISSN - 1598-2092
DOI - 10.6113/jpe.2016.16.2.695
Subject(s) - boost converter , buck converter , electric power system , fuel cells , battery (electricity) , power (physics) , control theory (sociology) , buck–boost converter , electrical impedance , voltage , engineering , computer science , electronic engineering , electrical engineering , control (management) , physics , quantum mechanics , chemical engineering , artificial intelligence
A fuel cell power conditioning system for online diagnosis and load leveling under the condition of varying load is developed in this study. The proposed system comprises a unidirectional boost converter and a bidirectional buck–boost converter with a battery. The system operates in two different modes. In normal mode, the bidirectional converter is utilized for load leveling; in diagnostic mode, it is utilized to control load voltage while the boost converter generates perturbation current to implement the online diagnosis function through in-situ electrochemical impedance spectroscopy (EIS). The proposed method can perform EIS for a fuel cell under varying-load conditions with no influence on the load. The validity and feasibility of the proposed system are verified by experiments, and the design procedure of the proposed system is detailed.
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