摘要
SF_6气体绝缘设备在运行过程中,其内部不可避免地会存在接触不良、磁饱和、磁短路等缺陷,或出现过载故障,可能导致SF_6气体绝缘设备出现局部过热性故障(POF)。在POF作用下,SF_6分解特性与设备中微量的H_2O含量关系极为密切。本文依据微量H_2O对各分解特征组分的生成影响机制,进一步研究了微量H_2O与表征POF故障属性的特征量之间的内在联系。结果表明:微量H_2O对各分解产物特征的生成量有不同程度的影响,但微量H_2O与生成各特征组分的中间产物作用的速率具有明显差异,导致了不同分解特征组分生成量与微量H_2O含量的内在关系区别显著。
During the operation of SF_6 gas-insulated equipment, the equipment inside exists poor contact,magnetic circuit saturation, and magnetic short-circuit defects inevitablely or appears overload fault, which may cause partial over-thermal fault(POF) of SF_6 gas-insulated equipment. Under the action of POF, the decomposition characteristics of SF_6 are closely related to the content of trace H_2O in the equipment. According to the effect mechanism of trace H_2O on the generation of each decomposition characteristic component, the inner relationship between trace H_2O and the feature parameters of POF were further studied.The results show that trace H_2 O has different effects on the generation amount of different characteristic decomposition products. There are obvious difference in the reaction rates between the intermediate products of each characteristic product and trace H_2O, which leads to the obvious difference of the internal relations between the generation amount of each decomposition characteristic product and the content of trace H_2O.
引文
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