The optical emission spectra(OES)reflect the presence of excited states in the gaseous discharge,which are directly linked to the decomposition characteristics of insulating gases.In this study,a pin/rod-plate dischar...The optical emission spectra(OES)reflect the presence of excited states in the gaseous discharge,which are directly linked to the decomposition characteristics of insulating gases.In this study,a pin/rod-plate discharge reactor driven by either a highvoltage direct current(DC)generator or a pulsed generator was developed to establish an effective platform for generating decomposition products of CF_(3)SO_(2)F and C_(4)F_(7)N.The experimental setup involved separate mixtures of CF_(3)SO_(2)F and C_(4)F_(7)N with different buffer gases(N_(2),CO_(2))under optimised operating conditions(maximum current)with varying mixture ratios.Through systematic investigation of emission spectrum characteristics under different gas mixing ratios,energy transitions of transient species induced by electrical excitation were captured using a high-resolution optical emission spectrometer.Under spark discharge conditions,transient decomposition products such as F-atoms,C-atoms and CN radicals were detected from CF_(3)SO_(2)F and C_(4)F_(7)N mixed with N_(2)or CO_(2),indicating that discharges induced the cleavage of C-S,C-F and C-C bonds,and revealing the decomposition characteristics of the two eco-friendly insulating gases in different buffer atmospheres.This work advances the understanding of decomposition mechanisms,providing valuable insights for fault diagnosis in gas-insulated electrical equipment.展开更多
基金supported by National Key Research and Development Programme of China,Grant/Award Number:2021YFB2401400.
文摘The optical emission spectra(OES)reflect the presence of excited states in the gaseous discharge,which are directly linked to the decomposition characteristics of insulating gases.In this study,a pin/rod-plate discharge reactor driven by either a highvoltage direct current(DC)generator or a pulsed generator was developed to establish an effective platform for generating decomposition products of CF_(3)SO_(2)F and C_(4)F_(7)N.The experimental setup involved separate mixtures of CF_(3)SO_(2)F and C_(4)F_(7)N with different buffer gases(N_(2),CO_(2))under optimised operating conditions(maximum current)with varying mixture ratios.Through systematic investigation of emission spectrum characteristics under different gas mixing ratios,energy transitions of transient species induced by electrical excitation were captured using a high-resolution optical emission spectrometer.Under spark discharge conditions,transient decomposition products such as F-atoms,C-atoms and CN radicals were detected from CF_(3)SO_(2)F and C_(4)F_(7)N mixed with N_(2)or CO_(2),indicating that discharges induced the cleavage of C-S,C-F and C-C bonds,and revealing the decomposition characteristics of the two eco-friendly insulating gases in different buffer atmospheres.This work advances the understanding of decomposition mechanisms,providing valuable insights for fault diagnosis in gas-insulated electrical equipment.
