Relationship between decomposition gas ratios and partial discharge energy in GIS, and the influence of residual water and oxygen
Relationship between decomposition gas ratios and partial discharge energy in GIS, and the influence of residual water and oxygen
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DOI：
10.1109/tdei.2014.6832269
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发表时间：
2014-06
影响因子：
3.1
通讯作者：
Ju Tang;F. Zeng;Xiaoxing Zhang;Jianyu Pan;Q. Yao;Xingzhe Hou;Yang Tang
中科院分区：
文献类型：
--
作者：
Ju Tang;F. Zeng;Xiaoxing Zhang;Jianyu Pan;Q. Yao;Xingzhe Hou;Yang Tang
六氟化硫(SF6)绝缘设备发生严重故障前，往往会发生不同能量的局部放电。局部放电的高电磁能量会使绝缘气体SF6分解成各种成分。元件类型及其形成率直接关系到绝缘故障的严重程度。因此，可以根据SF6分解的特征来评估局部放电能量，从而可以进一步利用局部放电能量来诊断绝缘状态。本文重点研究了局部放电条件下SF6的分解机理，建立了描述局部放电能量的特征参数，阐明了特征参数的物理意义。定义了有效能量特征比ERRMS，分析了ERRMS与局部放电能量的关系。最后讨论了微量H2O和O2对ERRMS的影响规律。
Partial discharge (PD) with different energy always occurs before a serious breakdown in sulfur hexafluoride (SF6) insulating equipment. The high electromagnetic energy of PD can cause the insulation gas SF6 to decompose into various components. Component types and their formation rate are directly related with insulation fault severity. Hence, PD energy can be evaluated based on the characteristics of SF6 decomposition, which could be further used to diagnose insulation status. This paper focuses on the SF6 decomposition mechanism under PD, establishes the feature parameter to describe PD energy, and clarifies the feature parameter's physical significance. In addition, this paper defines the effective energy characteristic ratio ERRMS and analyzes the relationship between ERRMS and PD energy. Finally, this paper discusses the influence regularity of trace H2O and O2 on ERRMS.