Spacer flashover characteristics in SF&lt;inf&gt;6&lt;/inf&gt; under repetitive nanosecond-pulses

Ran, Huijuan; Wang, Jue; Wang, Tao; Sun, Yong; Zhang, Dongdong; Yan, Ping

doi:10.1109/ipmhvc.2012.6518771

Cited by 1 publication

(2 citation statements)

References 17 publications

(14 reference statements)

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“…The spacer used is polyoxymethylene commercially known as delrin, which is a commonly used insulator in pulse power systems. The configuration of spark gap electrodes along with the spacer arrangement is very similar to the configurations reported in the literatures for surface flashover study (Ran et al, 2013;Ping Yan et al, 2011). Table 1 gives the characteristics of the insulating material used between the electrodes.…”

Section: Experimental Methodssupporting

confidence: 65%

“…This involves the formation of discharge path along the surface of the insulator that leads to breakdown at a reduced voltage. The presence of spacer between spark gap electrodes is necessary in the study of operation of GIS under VFTO especially when a series of breakdown occurs during the working of a disconnector (Ran et al, 2013). The spacer plays a critical role in Blumlein pulse forming line (PFL) based high voltage pulse power systems.…”

Section: Introductionmentioning

confidence: 99%

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Optical emission spectroscopy study on flashover along insulator surface due to particle contamination

et al. 2014

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The surface flashover behavior in ambient air and nitrogen are studied at a pressure of 1 kg/cm 2 using optical emission spectroscopy. A high dc voltage is applied to Rogowski profile electrodes with polyoxymethylene as the insulator between the electrodes. Three different conditions of needle protrusion along the surface of polyoxymethylene are used to study the variation in spectral characteristics due to particle contamination. When the insulator is placed between the spark gap electrodes, the OES spectra are dominated by the H α line in air and nitrogen medium. It was found that the intensity of N 2 + (B-X) emission is less in air surrounding the insulator medium. The plasma temperature during bulk breakdown in air is 0.433 eV, which increases to 0.434 eV with the pressurized nitrogen, which further increases in the presence of insulator to 0.441 eV and 0.44 eV in nitrogen and air, respectively. The electron density is obtained from the N emission line at 746.8 nm and the estimated peak value is 2.85 × 10 12 cm −3 in the presence of insulator. The plasma temperature decreases with increase in distance of particle contamination from cathode. The increase in electron density in air, as compared to nitrogen implies more material desorption in air which is also supported by the comparisons of H α lines.

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Section: Experimental Methodssupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%