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吸附剂对局部放电下SF6分解特征组分的吸附研究

DOI: 10.13334/j.0258-8013.pcsee.2014.03.021, PP. 486-494

Keywords: 吸附剂,局部放电,分解特性,特征组分,故障诊断

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Abstract:

为了保障SF6绝缘气体的纯度,需要在SF6气体绝缘设备气室中配置一定量的吸附剂,一方面用于控制气室内的水分含量,另一方面用于吸附因各种原因产生的杂质气体。因而,吸附剂的存在会对局部放电下使SF6发生分解而产生的特征组分进行吸附,使得特征组分含量和变化规律发生改变。在利用特征组分诊断气体绝缘设备内部故障时,必须考虑这一重要影响因素。为此,该文在搭建的SF6气体局部放电分解试验平台上,利用针–板电极产生局部放电(partialdischarge,PD)使SF6发生分解,采用气质联用仪定量测定放电室内特征组分的变化,获取不同吸附剂用量梯度下吸附特征组分的规律与特性。研究表明,无论有无放置吸附剂,在气室内都能检测到SOF4、SO2F2、SOF2和SO2等主要稳定特征组分,且随着吸附剂用量的增加,对特征组分的吸附率各不相同。

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