Title :
Calculation of the swarm parameters of SF6/CO2 by using Boltzmann equation analysis and a comparison with the measurement results
Author :
Fan, J. ; Grzybowski, S. ; Qiu, Y. ; Xiao, D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Mississippi State Univ., MS, USA
Abstract :
In this paper, the ionization and attachment coefficients α/N and η/N of SF6/CO2 gas mixtures are calculated. The calculation is done by using the Boltzmann equation analysis under Steady State Townsend (SST) conditions with E/N changed from 192Td to 400Td. The ionization and attachment process of SF6 are fully considered in the calculation while the attachment of CO2 is neglected. The calculated coefficients of SF6 /CO2 gas mixtures are compared with the SST measurement. The results give a good and fair agreement. The calculated limiting breakdown strength of SF6/CO2 gas mixtures (E/N)lim is also compared with the measurement result and gives good agreement. By comparing the electron energy distribution of SF6, CO2, CCl2F2 , the prerequisite of the Wieland approximation is shown
Keywords :
Boltzmann equation; SF6 insulation; Townsend discharge; carbon compounds; electric strength; electron attachment; gas mixtures; ionisation; Boltzmann equation; CO2; SF6; SF6/CO2 gas mixtures; Steady State Townsend measurements; Wieland approximation; attachment coefficients; breakdown strength; electron energy distribution; ionization coefficients; swarm parameters; Boltzmann equation; Costs; Electric breakdown; Electrons; Gas insulation; Gases; Integral equations; Ionization; Maxwell-Boltzmann distribution; Pulse measurements;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1995. Annual Report., Conference on
Conference_Location :
Virginia Beach, VA
Print_ISBN :
0-7803-2931-7
DOI :
10.1109/CEIDP.1995.483593
