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Relationship between decomposition gas ratios and partial discharge energy in GIS, and the influence of residual water and oxygen

机译:GIS中分解气体比例与局部放电能量之间的关系,以及残留水和氧气的影响

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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.
机译:在六氟化硫(SF 6 )绝缘设备严重击穿之前,总是会发生具有不同能量的局部放电(PD)。 PD的高电磁能会导致绝缘气体SF 6 分解成各种成分。组件类型及其形成速率与绝缘故障的严重程度直接相关。因此,可以基于SF 6 分解的特征来评估PD能量,这可以进一步用于诊断绝缘状态。本文着重研究了局部放电下的SF 6 分解机理,建立了表征局部放电能量的特征参数,阐明了该特征参数的物理意义。此外,本文定义了有效能量特征比ER RMS ,并分析了ER RMS 与PD能量之间的关系。最后,讨论了痕量H 2 O和O 2 对ER RMS 的影响规律。

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