Design of a Fuel Cell Power Conditioning System for Online Diagnosis and Load Leveling

作者：Nguyen Thanh Tuan; Doan Van Tuan; Choi Woojin^*

来源：Journal of Power Electronics, 2016, 16(2): 695-703.

DOI：10.6113/JPE.2016.16.2.695

• EIS
• Electrochemical impedance spectroscopy
• Fuel cell
• Load leveling
• Online diagnosis

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.

• 出版日期2016-3