环境介质对介质阻挡放电降解SF<sub>6</sub>影响的实验

doi:10.19595/j.cnki.1000-6753.tces.170139

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摘要

由于SF₆具有极高的温室效应潜在值且其在大气中的寿命长,SF₆的介质阻挡放电（DBD）降解技术一直是环保领域的热点和难点问题。当反应器放置在不同环境中时,由于反应器外电极与阻挡介质间的非完全接触以及不同环境介质的性质不同,介质阻挡放电的放电特性与反应器的温升会存在差异,从而影响SF₆的降解。该文测量油浸环境和空气环境中介质阻挡放电反应器的放电特性和温度变化,并通过比较两种环境中SF₆的降解率、能量效率和最终降解产物,对比去除SF₆气体的效果。实验结果显示,尽管油浸环境中反应器温度相对较低,但测得的放电功率明显高于空气环境中,有更多的能量用于降解SF₆,从而提高了SF₆的降解率,同时能量效率也有所提升,这表明油浸式的反应器可提升DBD降解SF₆的效果。

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关键词 ： SF₆降解, 介质阻挡放电, 介质, 油浸冷却

Abstract：

Due to the extreme high global warming potential and long atmospheric lifetime of SF₆, the removal of SF₆ using dielectric barrier discharge (DBD) plasma technology has been a hot and difficult problem in the field of environmental protection. When the DBD reactor is placed in different ambient conditions, the discharge characteristics of DBD and the temperature rise of the reactor will show differences due to the incomplete contact between the electrode and barrier dielectrics as well as the different properties of different ambient media. The discharge characteristics and temperature changes were both measured when the DBD reactor was exposed in the air and immersed in the oil. The effects of ambient medium on the removal of SF₆ were investigated by comparing the removal rate of SF₆, energy yield and the final degradation products in both two ambient conditions. The experimental results show that the discharge power of the reactor immersed in oil is significantly higher than that in the air environment although its temperature is relatively lower. Therefore, more energy is used for the abatement of SF₆ in oil ambience, which improves the removal rate. In addition, a greater energy yield is also achieved in oil ambience. This suggests that the immersion of the plasma reactor in electrically insulating oil enhances the performance of SF₆ removal.

Key words： Abatement of SF₆ dielectric barrier discharge medium oil-immersed cooling

收稿日期: 2017-02-14 出版日期: 2017-10-30

PACS:

O539

基金资助:

国家自然科学基金资助项目（51777144）

通讯作者: 张晓星男,1972年生,教授,博士生导师,研究方向电气设备的在线检测、等离子体放电的应用等。E-mail: xiaoxing.zhang@outlook.com

作者简介: 肖焓艳女,1992年生,博士研究生,研究方向为等离子体放电的应用等。E-mail: xhy533@hotmail.com

引用本文:

肖焓艳, 张晓星, 肖淞, 胡雄雄. 环境介质对介质阻挡放电降解SF₆影响的实验[J]. 电工技术学报, 2017, 32(20): 20-27. Xiao Hanyan, Zhang Xiaoxing, Xiao Song, Hu Xiongxiong. Experiment of Effects of Ambient Medium on Sulfur Hexafluoride Degradation for a Double Dielectric Barrier Discharge Reactor. Transactions of China Electrotechnical Society, 2017, 32(20): 20-27.

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