Rail-type gas switch with preionization by an additional corona discharge

5th International Congress on Energy Fluxes and Radiation Effects 2016

Belozerov, O.S.^1 ; Krastelev, E.G.^1

Joint Institute for High Temperatures, Russian Academy of Sciences, st. Izhorskaya 13/19, Moscow

125412, Russia^1

关键词: Corona discharges;    Cylindrical electrodes;    Experimental research;    Negative corona discharges;    Pre-ionization;    Spark-gaps;    Two electrodes;    Voltage rise;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/830/1/012019/pdf
DOI  :  10.1088/1742-6596/830/1/012019

来源: IOP

【 摘 要 】

Results of an experimental research of a rail-type gas switch with preionization by an additional negative corona discharge are presented. The most of measurements were performed for an air insulated two-electrode switch assembled of cylindrical electrodes of 22 mm diameter and 100 mm length, arranged parallel to each other, with a spark gap between them varying from 6 to 15 mm. A set of 1 to 5 needles connected to a negative cylindrical electrode and located aside of them were used for corona discharges. The needle positions, allowing an effecient stabilization of the pulsed breakdown voltage and preventing the a transition of the corona discharge in a spark form, were found. It was shown that the gas preionization by the UV-radiation of the parallel corona discharge provides a stable operation of the switch with low variations of the pulsed breakdown voltage, not exceeding 1% for a given voltage rise-time tested within the range from 40 ns to 5 μs.