Dielectric Design and Test of 1200 kV Semi-Flexible SF6 Insulated Transmission Line

Dale, S.J.; Bolin, P. C.; Cookson, A.H.; Eaton, R.

doi:10.1109/tpas.1983.317687

Cited by 12 publications

(1 citation statement)

References 6 publications

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“…It is significant that this new form of the Paschen law is found to hold over this large gap and pressure range, because of the engineering context that a 190/540 mm diameter gas insulated busbar, pressurised at 0.4 MPa, has a p * g product of 70 MPa • mm [20]. The breakdown voltage of such a structure is thus predicted by ( 9) to be 75% lower than would have been [17] 38/200 SF 6 0.1-0.39 (A4) Cookson, Dale [18,19] 89/226 SF 6 :N 2 0.1-0.62 (A5) Hoshina [20] 120/434 SF 6 :N 2 0.3 and 0.5 the case if U b had increased linearly with the product of pressure and spacing, as indicated by the classical Paschen law.…”

Section: Effect Of Gap Distancementioning

confidence: 99%

Electrical breakdown at high pressures: a Paschen law function and compressible gas dynamics

Waters

2018

J. Phys. D: Appl. Phys.

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A search is ongoing for compressed gas insulants of comparable performance with sulphur hexafluoride, which will avoid its severe global warming potential. This work will be assisted by a generic understanding of the factors that limit the high voltage withstanding strength of compressed gases. Most available experimental data relate to high-pressure SF 6 breakdown, but no quantitative physical model for breakdown voltage prediction has been developed other than empirical algorithms. The paper shows that a new form of the classical Paschen law can account for these data, which will provide a useful guide for the economical testing of candidate insulants and for the general design and physical limitations of equipment using compressed gases. The paper also examines the transient changes in compressible gas density that arise from shock wave development, which may influence high-pressure breakdown and determine the breakdown voltage.

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