Influence of H2O on SF6 discharge and decomposition characteristics under low moisture conditions

被引：0
|
作者：
Zhong L. [1 ]
Ji S. [1 ]
Liu K. [1 ]
Zhu L. [1 ]
Wang W. [2 ]
He W. [2 ]
Dong X. [2 ]
机构：
[1] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an
[2] State Grid Zhejiang Electric Power Research Institute, Hangzhou
来源：
| 1600年 / Xi'an Jiaotong University卷 / 50期
关键词：
Decomposition characteristics; Decomposition products; Moisture; SF[!sub]6[!/sub] gas-insulated electrical equipment;
D O I：
10.7652/xjtuxb201603018
中图分类号：
学科分类号：
摘要：
In order to study the influence of moisture in low volume fraction (<1 350×10-6) on discharge and decomposition characteristics of SF6, an experimental and testing platform for SF6 gas-insulated electrical equipment was designed in this paper. The influence of moisture on the capacity of partial discharge caused by metal protrusions defects and content variation of SOF2, SO2F2, SO2, CO2 was observed in detail. The results indicate that average and overall discharge capacity decrease first and then increase with the increase of volume fraction of moisture. H2O will promote the formation of all the four gas-decomposition products, with a stronger influence on the sulfur-containing products than CO2. Besides, the value of φ(SOF2+SO2)/φ(SO2F2) maintains stable with the variation of moisture, about 3-4 after 9h. The value of φ(SOF2+SO2+SO2F2)/φ(CO2) presents an overall increasing trend with moisture content and ultimately increases to a stable value about 2.5-3 under low moisture condition. Thus, the detection method of SF6 decomposition products should take into account the moisture content. © 2016, Xi'an Jiaotong University. All right reserved.
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页码：112 / 119and133
相关论文
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