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Robust low frequency current ripple elimination algorithm for grid-connected fuel cell systems with power balancing technique

Author

Listed:
  • Kim, Jong-Soo
  • Choe, Gyu-Yeong
  • Kang, Hyun-Soo
  • Lee, Byoung-Kuk

Abstract

The low frequency current ripple in grid-connected fuel cell systems is generated from dc–ac inverter operation, which generates 60 Hz fundamental component, and gives harmful effects on fuel cell stack itself, such as making cathode surface responses slower, causing an increase of more than 10% in the fuel consumption, creating oxygen starvation, causing a reduction in the operating lifetime, and incurring a nuisance tripping such as overload situation. With these reasons, low frequency current ripple makes fuel cell system unstable and lifetime of fuel cell stack itself short. This paper presents a fast and robust control algorithm to eliminate low frequency current ripple in grid-connected fuel cell systems. Compared with the conventional methods, in the proposed control algorithm, dc link voltage controller is shifted from dc–dc converter to dc–ac inverter, resulting that dc–ac inverter handles dc link voltage control and output current control simultaneously with help of power balancing technique. The results indicate that the proposed algorithm can not only completely eliminate current ripple but also significantly reduce the overshoot or undershoot during transient states without any extra hardware. The validity of the proposed algorithm is verified by computer simulations and also by experiments with a 1 kW laboratory prototype.

Suggested Citation

  • Kim, Jong-Soo & Choe, Gyu-Yeong & Kang, Hyun-Soo & Lee, Byoung-Kuk, 2011. "Robust low frequency current ripple elimination algorithm for grid-connected fuel cell systems with power balancing technique," Renewable Energy, Elsevier, vol. 36(5), pages 1392-1400.
  • Handle: RePEc:eee:renene:v:36:y:2011:i:5:p:1392-1400
    DOI: 10.1016/j.renene.2010.10.023
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    Citations

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    Cited by:

    1. Joseph Oyekale & Mario Petrollese & Vittorio Tola & Giorgio Cau, 2020. "Impacts of Renewable Energy Resources on Effectiveness of Grid-Integrated Systems: Succinct Review of Current Challenges and Potential Solution Strategies," Energies, MDPI, vol. 13(18), pages 1-48, September.
    2. Kim, Jonghoon & Lee, Inhae & Tak, Yongsug & Cho, B.H., 2013. "Impedance-based diagnosis of polymer electrolyte membrane fuel cell failures associated with a low frequency ripple current," Renewable Energy, Elsevier, vol. 51(C), pages 302-309.
    3. Fathabadi, Hassan, 2015. "Utilization of electric vehicles and renewable energy sources used as distributed generators for improving characteristics of electric power distribution systems," Energy, Elsevier, vol. 90(P1), pages 1100-1110.
    4. Lee, Sang C. & Kwon, Osung & Thomas, Sobi & Park, Sam & Choi, Gyeung-Ho, 2014. "Graphical and mathematical analysis of fuel cell/battery passive hybridization with K factors," Applied Energy, Elsevier, vol. 114(C), pages 135-145.

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