doi:10.16186/j.cnki.1673-9787.2019100028

Received:2019/10/11

Revised:2019/12/16

Published:2021/01/15

Study on the characteristics of micro-gap gas discharge under AC/DC voltage

LIU Xuguang1, SUN Yanzhou1, DONG Keliang1, JIANG Zhihua1,2, XIE Chunwei3

1.School of Electrical Engineering and Automation， Henan Polytechnic University ，Jiaozuo  454000 ， Henan， China;2.State Key Laboratory of Alternative Electrical Power with Renewable Energy Sources， Beijing  102206 ， China;3.State Grid Anhui Fuyang Electric Power Supply Company， Fuyang  236000 ，Anhui， China

Abstract:In order to study the discharge mechanism of electrodes with different spacing under AC and DC voltage， an experimental platform based on micro-gap precise distance controller was built. The breakdown voltage of stainless steel electrodes at 1 〜100 μm was measured， and the breakdown voltage curve was drawn and compared with the Paschen curve. It was found that the breakdown voltage curve was not consistent with the Paschen curve at1 〜5 μm. With the increase of spacing， the trend of breakdown voltage at 5 〜100 μm was similar to that of Paschen curve. Through calculation， the breakdown field strength at 1 〜5 μm was 108 V/m. According to the measured breakdown voltage curve， the effective electron yield was estimated. The relationship between the reduced electric field E/p and the electric field reciprocal was analyzed. The dependence of the relationship was found that the field emission in the 1 〜5 μm was mainly determined by the high field strength. Finally， the relationship between different spacing and field emission current density was studied. The reason why the breakdown voltage deviated from the Paschen curve at l 〜5 μm gap was analyzed by F-N theory ，and it was concluded that field emission played a decisive role.

Key words:micro-gap;breakdown voltage;reduced electric field;current density;field-induced electron emission

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