高电压技术2024，Vol.50Issue(3)：1311-1321,11.DOI:10.13336/j.1003-6520.hve.20231905
潮湿环境下中压电缆接头早期故障的演变规律及特性
Evolution Process and Characteristics of Medium Voltage Cable Joints'Incipient Faults in Humid Environment
摘要
Abstract
For lack of research on the evolution process of incipient cable joint faults at present,this paper designed sim-ulation experiments for incipient cable joint fault in wet environment according to the actual operation scenario,obtained the characteristics of the change law of incipient cable joint fault current,insulation damage,water displacement in the air gap and so on under different discharge times,and analyzed the evolution process of incipient fault.According to the electrode composition characteristics,the incipient fault is divided into the first stage and the second stage,and the re-spective characteristics of the two stages are proposed.On this basis,an early fault simulation model was established when the arc position was fixed.Moreover,the changes in arc temperature,the formation of high-temperature areas in the solid insulation part,and the heat dissipation in the arc area are simulated and analyzed.Based on the experimental and simulation results,the moving position arc and reignition arc constitute the first stage of incipient fault.When the arc po-sition is near the joint ground point,the incipient fault will enter the second stage.When the flashover marks transfix the insulation surface,a permanent fault will be formed.The results of this paper provide theoretical supports for incipient fault feature recognition and monitoring.关键词
潮湿环境/中压电缆接头/早期故障实验模拟/多物理场仿真/故障演变过程Key words
humid environment/medium voltage cable joint/analysis of incipient fault/multi-physics simulation/failure evolution process引用本文复制引用
于志鹏,许永鹏,钱庆林,段常坤,江秀臣..潮湿环境下中压电缆接头早期故障的演变规律及特性[J].高电压技术,2024,50(3):1311-1321,11.基金项目
国家自然科学基金(51477100). Project supported by National Natural Science Foundation of China(51477100). （51477100）
