AUTHOR=An Yunzhu , Su Menghan , Hu Yuanchao , Hu Shangmao , Huang Tao , He Baina , Yang Minghao , Yin Kaiqiang , Lin Yitong 

TITLE=The Influence of Humidity on Electron Transport Parameters and Insulation Performance of Air

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 9 - 2021

YEAR=2022

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2021.806595

DOI=10.3389/fenrg.2021.806595

ISSN=2296-598X

ABSTRACT=The external environmental conditions affect the external insulation performance of power equipment with air as the medium. In order to study the physical characteristics of air discharge, the microscopic process of electron-molecule collision in the air based on the Boltzmann equation has been studied in this paper. The influence of humidity on the air gap insulation performance were also analysed. The calculation results show that with the temperature 300K and the pressure 1.0atm, the electron energy distribution function and electron transport parameters varied with the air relative humidity. As the air relative humidity is increased by each 30%, the average electron energy decreased by about 0.2eV, the reduced electron mobility decreases by about 0.25×1023(1/(V•m•s)), the reduced electron diffusion coefficient decreases by about 0.2×1024(1/(m•s)), the effective ionization coefficient decreases by about 4×10-24m2.As the air relative humidity increases from 0% to 60%, the critical breakdown electric field increases by 1.22 kV/cm.