Publisher : The Korean Institute of Power Electronics
DOI : 10.6113/JPE.2016.16.2.695
Title & Authors
Design of a Fuel Cell Power Conditioning System for Online Diagnosis and Load Leveling Nguyen, Thanh-Tuan; Doan, Van-Tuan; Choi, Woojin;
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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