基于CFD技术的六氟化硫电气设备中气体湿度测量方法研究

发布时间：2018-01-06 18:11

本文关键词：基于CFD技术的六氟化硫电气设备中气体湿度测量方法研究　出处：《电工技术学报》2014年S1期 　论文类型：期刊论文

【摘要】：六氟化硫气体湿度是保证气体绝缘电气设备安全运行的重要指标,为研究不同气体湿度测量方法测试结果的准确性,采用CFD技术对封闭与流动体系条件下水分子在设备内部的扩散过程进行了模拟,结果发现当取样口出现高湿度时,封闭体系中水分子达到扩散均匀一般需要几小时时间,而流动体系中水分子达到扩散均匀仅需要几秒钟时间;当设备本体出现高湿度时,封闭体系中水分子达到扩散均匀仍需要几小时时间,而流动体系中水分子达到扩散均匀的时间不超过60s。这证明了无论是在封闭还是流动体系下取样口上安装的气体湿度在线测量装置都不能实时反映充气设备本体内的气体湿度,六氟化硫设备中气体湿度测量最有效的方法是将设备内的气体引出后再进行湿度测量。
[Abstract]:Sulfur hexafluoride gas humidity is an important index to ensure the safe operation of gas insulated electrical equipment. CFD technique was used to simulate the diffusion process of water molecules in the equipment under closed and flowing system conditions. The results showed that the high humidity appeared at the sampling port. It takes several hours for water molecules to reach diffusion uniformity in closed system, but only a few seconds for water molecules in flow system to reach diffusion uniformity. When there is high humidity in the device, it still takes several hours for the water molecules in the closed system to reach the diffusion uniformity. However, the diffusion time of water molecules in the flow system is not more than 60 s. This proves that the on-line measuring device of gas humidity installed on the sampling port under both closed and flowing system can not reflect the inflatable equipment in real time. The humidity of the gas in the body. The most effective method of gas humidity measurement in sulfur hexafluoride equipment is to measure the humidity after the gas is extracted from the equipment.
【作者单位】：国网湖南省电力公司电力科学研究院;
【分类号】：TM506
【正文快照】： 1引言六氟化硫(SF6)气体由于其优良的绝缘和灭弧性能被广泛应用于各类高压电气设备中[1-5]。然而,水分的存在会大幅降低SF6气体优越的电气性能。水分子能够与SF6电离分解产物反应生成HF、SO2、SOF2等毒性气体,这些气体会对设备金属部件产生腐蚀,甚至导致机械操作失灵。更重要

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