宁夏电力Issue(3)：44-50,7.DOI:10.3969/j.issn.1672-3643.2024.03.007
绝缘子气隙缺陷下的局部放电发展过程研究
Research on the development process of partial discharge in GIS due to insulator gap defects
董玉林 1曾鹏 1朱磊 1韩忠晖 2李天昊 1刘朝阳1
作者信息
- 1. 国网长沙供电公司,湖南 长沙 410015
- 2. 国网湖南省电力有限公司,湖南 长沙 410029
- 折叠
摘要
Abstract
The paper examines the development of partial discharge(PD)in gas-insulated switchgear(GIS)due to insu-lator gap defects.It analyzes the evolution of ultra-high frequency(UHF)PD signals through φ-u scatter plots and φ-n spectrograms at different stages and introduces nine characteristic parameters.The study reveals consistent discharge occurrence patterns during negative and positive half-cycles.Findings show that the frequency and magnitude of dischar-ges during positive and negative half-cycles follow a consistent pattern.Maximum discharge pulse amplitudes and cumu-lative discharge volumes display exponential growth,while the average intervals between adjacent PD pulses decrease exponentially.Notably,the time intervals between pulses during negative half-cycles consistently exceed those in positive half-cycles,diminishing this difference as PD progresses.The maximum time intervals between discharges also decrease over time.The study provides insights into the physical mechanisms driving these observed changes,correlating them with the microphysical processes of PD evolution.关键词
绝缘子气隙缺陷/放电发展过程/特征提取/变化规律/机理分析Key words
insulator gap defect/partial discharge process/feature extraction/trend analysis/mechanistic explanation分类
信息技术与安全科学引用本文复制引用
董玉林,曾鹏,朱磊,韩忠晖,李天昊,刘朝阳..绝缘子气隙缺陷下的局部放电发展过程研究[J].宁夏电力,2024,(3):44-50,7.
