Research Papers

A Novel Input Ripple Current Suppressing Topology Configuration and Controller for Residential Fuel Cell Power Conditioning System

[+] Author and Article Information
Yong Wang

Energy Laboratory, Samsung Advanced Institute of Technology, Mt.14-1, Nongseo, Giheung, Yongin 446-712, Korea

J. Fuel Cell Sci. Technol 7(3), 031002 (Mar 09, 2010) (3 pages) doi:10.1115/1.3206969 History: Received May 08, 2008; Revised July 09, 2009; Published March 09, 2010; Online March 09, 2010

Proton exchange membrane fuel cell (PEMFC)’s power conditioning system (PCS) for residential application always contains two stage converter configuration of the dc-dc converter and the power grid connection dc-ac inverter. As known well, the inverter tends to draw an ac ripple current at twice the output frequency. For fuel cell system, the ripple current has worse effect than the other system, since it reduces the fuel cell system’s output capacity and wastes the fuel. Worst of all, it shortens the fuel cell’s life span. In this paper, first, the power grid connection PEMFC PCS’s ripple current source and propagation are analyzed. Then, a ripple suppressing PCS topology configuration and controller are proposed to achieve the low input ripple current control.

Copyright © 2010 by American Society of Mechanical Engineers
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Figure 1

Block diagram of PEMFC PCS in residential application

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Figure 2

Low frequency ripple current generated by H-bridge inverter, where in Fig. 2, f is the frequency of Ir

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Figure 3

The ripple suppressing PCS configuration and controller block diagram, where in Fig. 3, DPLL is the digital phase locking loop

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Figure 4

Input current single loop controller

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Figure 5

The inverter controller model

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Figure 6

Primary and secondary voltage waveforms of the CFFB transformer (where Vp is the transformer’s primary voltage, and Vs is the transformer’s secondary voltage)

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Figure 7

Inverter output voltage and current

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Figure 8

Input current ripple with proposed PCS configuration but conventional controller

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Figure 9

Input current ripple with proposed PCS configuration and controller



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