DC Breakdown Characteristic of Air Gap With Water Droplets

Under rain conditions, the sliding water droplets on the insulator's surface shorten the air insulation distance between the sheds and even cause a flashover. In order to study the mechanism of air gap breakdown with rain droplets, the breakdown process was recorded by a high-speed camera and t...

Full description

Saved in:
Bibliographic Details
Published inIEEE transactions on plasma science Vol. 49; no. 6; pp. 1962 - 1968
Main Authors Wu, Xiaohan, Cao, Bin, Li, Zong, Yang, Daiming, Shen, Shuhang, Wang, Liming
Format Journal Article
LanguageEnglish
Published New York IEEE 01.06.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Air gap
Air gaps
Anodes
Breakdown
breakdown characteristic
Breakdown voltage
Conductivity
Direct current
Droplets
Electric breakdown
Electric potential
Flashover
High speed cameras
Insulation
Insulators
partial arc
Rain
Rain water
Voltage
water droplet
Water drops
Online AccessGet full text

Cover

More Information
Summary:Under rain conditions, the sliding water droplets on the insulator's surface shorten the air insulation distance between the sheds and even cause a flashover. In order to study the mechanism of air gap breakdown with rain droplets, the breakdown process was recorded by a high-speed camera and the influences of rain water droplets (conductivity, volume, and position) were studied. The experimental results show that the impact of the water droplets on the direct current (dc) breakdown voltage is related to the air gap length. The shorter the air gap, the greater the drop of the flashover voltage. Although water conductivity does not affect the breakdown voltages, the arc development path is related to it. This research has significance for revealing the rain flashover mechanism of insulators.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2021.3079137