内蒙古电力技术2026，Vol.44Issue(3)：64-70,7.DOI:10.19929/j.cnki.nmgdljs.2026.0033
SF6气体低温下典型缺陷的局部放电特性研究
Research on Partial Discharge Characteristics of Typical Defects in SF6 at Low Temperatures
摘要
Abstract
Aiming at the problem that the change of SF6 gas state affects the partial discharge of equipment,a partial discharge test platform of SF6 gas at low temperature is built to explore the partial discharge initiation voltage and partial discharge development characteristics of SF6 gas in surface discharge,tip discharge and suspension discharge models under different pressure and temperature conditions from-50℃to 20℃are investigated.The test results show that the partial discharge initial voltage and discharge amplitude of the three models show a hump-shaped trend with temperature change.For the surface discharge and suspension discharge models,when the temperature decreases from 20℃to 0℃,the partial discharge initial voltage and discharge amplitude show a slight upward trend with the decrease of temperature.When the temperature decreases from 0℃to-50℃,both of them show a downward trend under the influence of intermolecular Van Der Waals force.Among the three models,the temperature drop has the most significant effect on the partial discharge initial voltage of the surface discharge model,with a maximum of 64.3 kV and a minimum of 25.3 kV,and the decrease is about 60.6%.关键词
SF6气体/局部放电特性/典型缺陷/PRPD谱图/低温液化Key words
SF6 gas/partial discharge characteristics/typical defects/PRPD spectrum/low temperature liquefaction分类
信息技术与安全科学引用本文复制引用
车传强,赵顺,刘琦,张志斌,王磊,王英杰,张慧芬..SF6气体低温下典型缺陷的局部放电特性研究[J].内蒙古电力技术,2026,44(3):64-70,7.基金项目
内蒙古自治区自然科学基金项目"低温下瓷柱式断路器SF6气液相变及防液化关键机制研究"(2024LHMS05010) （2024LHMS05010）
