IEEE ICHVE 2022 / 1-PAGE ABSTRACT
Experimental study on thermal characteristics during leader discharge and its recovery procedure
Yuqi Shuai^1,*, Xiaohua Lv², Tao Long³, Ziqiang Xu^4
1,2,3,4State Grid Nanjing Power Supply Company, Nanjing 210000, China
shuaiyq_thu@foxmail.com

Purpose/Aim
The study of the thermodynamic characteristics of the leader discharge and its recovery process can provide the basis for the reliable operation of the energy Internet.
Experimental methods
Based on Mach-Zehnder laser interferometry platform, a multi-parameter comprehensive observation experimental platform for long air gap pilot discharge and its recovery process was built, which realized the simultaneous measurement of thermal characteristics, morphological parameters and electrical parameters.
Results/discussion
The effects of voltage amplitude, rod electrode size and long air gap distance on the thermal characteristics of the leader discharge and its recovery process were investigated under positive polarity standard operating impulse voltage. 
Conclusions
With the increase of the voltage amplitude, the initial time of the temperature rise of the leader discharge decreases, the peak temperature increases, and the time to return to room temperature becomes longer.
 

long air gap discharge,leader discharge,M-Z laser interferometer