Positive switching impulse discharge performance of rod‐plane short air gap under rain conditions

Jiang, Xingliang; Yuan, Ye; Shu, Lichun; Zhang, Zhijin

doi:10.1049/iet-smt.2014.0356

Cited by 5 publications

(1 citation statement)

References 27 publications

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“…For example, Li [25] used ion kinetics to analyse the effect of humidity on dielectric breakdown voltage. Jiang [26] investigated the effect of rain and its intensity on switching impulse of short gaps. Bian [27] explored the role of air pressure in the variation of negative corona-generated space charge.…”

Section: Introductionmentioning

confidence: 99%

High‐altitude tunnel‐catenary gap impulse discharge characteristics and breakdown voltage correction

et al. 2023

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Air gap impulse discharge characteristics of railway tunnel‐catenary at high‐altitude are of great significance to the electrical insulation design. The existing altitude correction methods for non‐uniform air gaps are not applicable to tunnel‐catenary. To investigate the impulse discharge characteristics of the tunnel‐catenary, a typical structural model was built in an artificial climate chamber. Different altitudes were simulated by adjusting the atmospheric pressure. The 50% breakdown voltages of the 300–700 mm tunnel‐catenary gap were tested at 243–4000 m. The test found that the altitude/atmospheric pressure and gap length have an evident effect on the 50% impulse breakdown voltage, and the influence of humidity is relatively small. The polarity effect was analysed by streamer theory. The {d, P, h} parameter method was employed to obtain the fitting formulas for the impulse breakdown voltage. A high‐altitude correction method for the tunnel‐catenary breakdown voltage based on 1 km altitude was proposed. Field natural tests were conducted to verify the accuracy of the proposed method. The results show that the breakdown voltage obtained by the correction method has an average error of 3.66% in the results of the field tests, indicating that the method has engineering application prospects.

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Section: Introductionmentioning

confidence: 99%