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Optimization of Supercapacitor Assisted Surge Absorber (SCASA) Technique: A New Approach to Improve Surge Endurance Using Air-Gapped Ferrite Cores

Author

Listed:
  • Sadeeshvara Udayanga Silva Thotabaddadurage

    (School of Engineering, University of Waikato, Hamilton 3240, New Zealand)

  • Nihal Kularatna

    (School of Engineering, University of Waikato, Hamilton 3240, New Zealand)

  • D. Alistair Steyn-Ross

    (School of Engineering, University of Waikato, Hamilton 3240, New Zealand)

Abstract

SCASA is a patented technique commercialized as a surge protector device (SPD) that adheres to UL-1449 test standards. Apart from the novel use of supercapacitors, SCASA design incorporates a coupled-inductor wound to a specially selected magnetic material of powdered-iron. In this study, we investigate the limitations of the present design under transient operation and elucidate ways to eliminate them with the use of air-gapped ferrite cores. In modelling the operation under 50 Hz AC and transient conditions, a permeance-based approach is used; in addition, non-ideal characteristics of the transformer core are emphasized and discussed with empirical validations. The experimental work was facilitated using a lightning surge simulator coupled with the 230 V AC utility mains; combinational surge-waveforms (6 kV/3 kA) defined by IEEE C62.41 standards were continuously injected into SPD prototypes during destructive testing. Such procedures substantiate the overall surge-endurance capabilities of the different core types under testing. With regard to optimizations, we validated a 95% depletion of a negative-surge effect that would otherwise pass to the load-end, and another 13–16% reduction of the clamping voltage verified the effectiveness of the methods undertaken. In conclusion, SCASA prototypes that utilized air-gapped cores revealed a greater surge endurance with improved load-end characteristics.

Suggested Citation

  • Sadeeshvara Udayanga Silva Thotabaddadurage & Nihal Kularatna & D. Alistair Steyn-Ross, 2021. "Optimization of Supercapacitor Assisted Surge Absorber (SCASA) Technique: A New Approach to Improve Surge Endurance Using Air-Gapped Ferrite Cores," Energies, MDPI, vol. 14(14), pages 1-21, July.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:14:p:4337-:d:596884
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    Cited by:

    1. Zichao Jin & Yue Cao & Shuwang Li & Wenjun Ying & Mahesh Krishnamurthy, 2023. "Analytical Approach for Sharp Corner Reconstruction in the Kernel Free Boundary Integral Method during Magnetostatic Analysis for Inductor Design," Energies, MDPI, vol. 16(14), pages 1-16, July.
    2. Nihal Kularatna, 2023. "Power Conditioning and Power Protection for Electronic Systems," Energies, MDPI, vol. 16(6), pages 1-4, March.

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