高压电器2025，Vol.61Issue(7)：44-51,8.DOI:10.13296/j.1001-1609.hva.2025.07.006
喷口烧蚀对SF6开关设备电弧放电分解产物的影响研究
Research on Influence of Nozzle Ablation on Decomposition Products of SF6 Switchgear Under Arc Discharge
摘要
Abstract
The nozzle will be eroded by the arc in case of interruption of SF6 switchgear.The degree of nozzle abla-tion is closely related to the SF6 decomposition products.However,the characteristic products of nozzle ablation un-der the condition of arc discharge are not clear,which seriously restricts the application of SF6 decomposition prod-uct analysis method in fault diagnosis.In order to explore the characteristic products of nozzle ablation and its rela-tionship with arc energy,an arc discharge test platform is set up based on 40.5 kV SF6 circuit breaker.The arc dis-charge tests in SF6 and He atmosphere are performed under the condition of installation and removal of the nozzle.The gas after the interruption tests is qualitatively and quantitatively detected and analyzed by gas chromatography.It is found after 10 times of interruption test at 5 kA that CF4,C2F6 and CO2 produced by nozzle ablation in SF6 atmo-sphere account for 99.8%,77.1%and 70.3%of the total generation respectively,and C3F8 produced by nozzle abla-tion in He atmosphere accounts for 100%of the total generation.Therefore,CF4,C2F6,C3F8 and CO2 are suitable as indicators to characterize the degree of nozzle ablation.Furthermore,the correlation degree with nozzle ablation from strong to weak is CF4>C2F6≈C3F8>CO2.关键词
六氟化硫/电弧放电/分解产物/喷口烧蚀Key words
SF6/arc discharge/decomposition product/nozzle ablation引用本文复制引用
徐孟元,杨韧,王占北,徐留玉,闫静,耿英三,李旭,薛军,苏波..喷口烧蚀对SF6开关设备电弧放电分解产物的影响研究[J].高压电器,2025,61(7):44-51,8.基金项目
国网陕西省电力有限公司科技项目.Project Supported by State Grid Shaanxi Electric Power Company Project. （）
