Statistical Methods for Identifying Small Differences in the Thermal Interruption Performance of SF6 Alternatives

Authors

  • J. Engelbrecht High Voltage Laboratory, Swiss Federal Institute of Technology Zurich (ETHZ), 8092 Zurich, Switzerland https://orcid.org/0000-0002-9832-4833
  • P. Pietrzak High Voltage Laboratory, Swiss Federal Institute of Technology Zurich (ETHZ), 8092 Zurich, Switzerland
  • D. Christen High Voltage Laboratory, Swiss Federal Institute of Technology Zurich (ETHZ), 8092 Zurich, Switzerland
  • P. Simka High Voltage Laboratory, Swiss Federal Institute of Technology Zurich (ETHZ), 8092 Zurich, Switzerland
  • C. Franck High Voltage Laboratory, Swiss Federal Institute of Technology Zurich (ETHZ), 8092 Zurich, Switzerland

DOI:

https://doi.org/10.14311/ppt.2023.1.36

Keywords:

switching arcs, gas circuit breakers, thermal interruption, CO2, SF6 alternatives

Abstract

This contribution will present thermal current interruption measurements performed in pure CO2 with a puffer circuit-breaker test device and establish a statistical method to assess the reignition probability as a function of the prospective current slope. Its efficacy will be demonstrated with measurements of the interruption limit scaling with respect to the pressure buildup inside the test device. A separate contribution will apply these methods to evaluate the influence of fluorinated additives on the switching performance.

References

P. Pietrzak et al. Thermal arc interruption performance of CO2 and CO2/C4F7N mixture. To appear in 24th Symposium on Physics of Switching Arc, 2023.

C. Franck et al. Comparative Test Program Framework for Non-SF6 Switching Gases. B&H Electrical Engineering, 15:19–26, 2021. doi:10.3929/ethz-b-000508915.

D. Peelo. Current Interruption Transients Calculation, chapter 5, pages 111–123. John Wiley & Sons, Ltd, 2020. ISBN 9781119547273. doi:10.1002/9781119547273.ch5.

J. Engelbrecht et al. Evaluating conductance decay and post-arc current in axially blown CO2 arcs. To appear in Proc. of the XXIII Int. Conf. on Gas Discharges, 2023.

E. Wilson. Probable inference, the law of succession, and statistical inference. Journal of the American Statistical Association, 22(158):209–212, 1927. doi:10.1080/01621459.1927.10502953.

S. Wallis. Binomial confidence intervals and contingency tests: Mathematical fundamentals and the evaluation of alternative methods. Journal of Quantitative Linguistics, 20(3):178–208, 2013. doi:10.1080/09296174.2013.799918.

B. W. Turnbull. Nonparametric estimation of a survivorship function with doubly censored data. Journal of the American Statistical Association, 69(345):169–173, 1974.

A. Plessl. The Influence of Pressure Profiles on Gas Blast Arc Interruption. Proc. of the VII Int. Conf. on Gas Discharges, pages 32–35, 1982.

T. Christen and M. Seeger. Current interruption limit and resistance of the self-similar electric arc. Journal of Applied Physics, 97(10):106108, 2005. doi:10.1063/1.1913802.

T. Uchii et al. Thermal interruption capability of CO2 in a puffer-type circuit breaker utilizing polymer ablation. IEEE/PES Transmission and Distribution Conference and Exhibition, 3:1750–1754, 2002. doi:10.1109/TDC.2002.1177719.

P. Stoller et al. CO2 as an Arc Interruption Medium in Gas Circuit Breakers. IEEE Transactions on Plasma Science, 41(8):2359–2369, Aug 2013. doi:10.1109/TPS.2013.2259183.

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Published

2023-08-08

Issue

Vol. 10 No. 1 (2023)

Section

Articles

License

Copyright (c) 2023 J. Engelbrecht, P. Pietrzak, D. Christen, P. Simka, C. Franck

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