高电压技术2019，Vol.45Issue(4)：1018-1025,8.DOI:10.13336/j.1003-6520.hve.20190329002
线形金属微粒对SF6局部放电含硫分解组分的影响
Influence of Free Wire-type Metal Particles on SF6 Sulfur-containing Decomposition Components Under Partial Discharge
摘要
Abstract
Free wire-type metal particles within SF6 direct current (DC) gas-insulated equipment, represented by the wall bushing in the whole power system, greatly threaten the insulation system by distorting the electric field and inducing partial discharge (PD), and easily lead to accidents. In order to investigate the influence of free wire-type metal particles on SF6 decomposition characteristics under HVDC, we established an HVDC experimental platform to carry out SF6 decomposition tests under stable PD, which was generated by using a ball-bowl electrode with different diameters, shape and size of the metal particles. And the volume fractions of three SF6 characteristic decomposition components (SO2 F2, SOF2 and SO2) were tested by gas chromatography mass spectrometer (GC/MS) to obtain the main features of these components under different diameters of free wire-type metal particles. The experimental results show that the volume fraction and total formation of the three SF6 characteristic decomposition components increase with time, but the trend of formation rates is different. The effective formation rates of the three sulfur-containing gases are ranked by diameters as follows: 0.3 mm＞0.4 mm＞0.5 mm＞0.6 mm. After 24 hours, and the rates of total volume fractions of the three SF6 characteristic decomposition components are in following sequences: the wire-type particles＞lamellar particles＞spherical particles. The free wire-type metal particle defects have a significant impact on the sulfur-containing characteristic decomposition components of DC gas insulation equipment and are correlated with diameters. The results can provide references for improving the technology of DC gas-insulated equipment fault diagnosis and condition monitoring.关键词
自由线性金属微粒/HVDC/局部放电/SF6分解特性/含硫分解组分Key words
free wire-type metal particles/HVDC/partial discharge/SF6 decomposition characteristics/sulfur-containing decomposition components引用本文复制引用
唐炬,周永建,唐博文,高克利,姚强,曾福平..线形金属微粒对SF6局部放电含硫分解组分的影响[J].高电压技术,2019,45(4):1018-1025,8.基金项目
国家重点研发计划 (2017YFB0902705) （2017YFB0902705）
国家自然科学基金 (51377181 （）
51607127) （）
