Correlation Characteristics Comparison of SF6 Decomposition versus Gas Pressure under Negative DC Partial Discharge Initiated by Two Typical Defects

被引：3
|
作者：
Yang, Dong [1 ]
Tang, Ju [1 ]
Yang, Xu [1 ]
Li, Ke [1 ]
Zeng, Fuping [1 ]
Yao, Qiang [2 ]
Miao, Yulong [2 ]
Chen, Lincong [3 ]
机构：
[1] Wuhan Univ, Sch Elect Engn, Wuhan 430072, Peoples R China
[2] Chongqing Power Co, Elect Power Res Inst, Chongqing 401123, Peoples R China
[3] Hainan Power Grid Co, Elect Power Res Inst, Haikou 570100, Hainan, Peoples R China
来源：
ENERGIES | 2017年 / 10卷 / 08期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
SF6; partial discharge (PD); direct current (DC); gas pressure; metal protrusion defect; free metal particles defect; GIS;
D O I：
10.3390/en10081085
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Aimed to clarify the correlation characteristics between the internal partial discharge (PD) in negative direct current (DC) gas insulated system (GIS) and gas pressure initiated by two typical defects (i.e., free-metal particles and metal protrusion), this study on PD decomposition of sulfur hexafluoride (SF6) was investigated under different pressures on the basis of constructing a SF6 decomposition experimental platform with DC PD. Free-metal particles and metal protrusion in a GIS were simulated using a spherical-bowl electrode and a needle-plate electrode, respectively. Trends and differences in the performance of SF6 decomposition components SOF2, SO2F2, CO2, and SO2 at different pressures were compared and analyzed by experiments under different defects. Based on gas microscopic ionization theory, the relationship between the decomposition component and gas pressure was deduced and verified. The concentrations of different decomposition components were found to vary with the change in gas pressure under different defects, whereas the characteristic ratios of decomposition components versus gas pressure showed a similar trend.
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页数：12
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