电工技术学报2017，Vol.32Issue(2)：24-32,9.
电缆接头内部气隙放电缺陷下的绝缘劣化程度表征方法
Study of Cracking Extent for Gap Discharge in Insulating Material of Power Cable Joint
杨帆 1杨旗 1程鹏 2王晓宇 3杨永明1
作者信息
- 1. 输配电装备及系统安全与新技术国家重点实验室(重庆大学) 重庆400044
- 2. 国网四川省电力公司成都供电公司 成都 610041
- 3. 国网浙江省电力公司电力科学研究院 杭州 310014
- 折叠
摘要
Abstract
A plasma-chemical hybrid model was established to study the characterization method of cracking extend for air-gap discharge in internal insulating materials of power cable connector.The model contains the Poisson equation,electron transport equation,electron energy transport equation,heavy particle transport equation and the plasma-chemical reactions of 12 kinds of particles in the air-gap discharge of power cable joint.At the same time,the secondary electrons emission and the surface charge accumulation process were also taken into account.Based on the above model and the finite element software,the air-gap discharge process of insulating materials in the cable connector was simulated.In addition,the discharge pulse waveforms with different gap lengths were obtained using parameter scanning method to count the phase,frequency numbers and amplitude in per circle.Statistics suggest that characteristics of discharge phase,frequency numbers and amplitude have significant differences as the increase of air-gap length.Accordingly,the cracking processes of cable joint were divided into initial stage,development stage,and pre-breakdown stage.The characteristics of phase,frequency numbers and amplitude provide a method for the cracking assessment in the insulating air gap discharge of power cable connector.关键词
电缆接头/气隙放电/等离子体-化学模型/劣化评估Key words
Cable joint/gap discharge/plasma-chemistry model/degradation assessment分类
信息技术与安全科学引用本文复制引用
杨帆,杨旗,程鹏,王晓宇,杨永明..电缆接头内部气隙放电缺陷下的绝缘劣化程度表征方法[J].电工技术学报,2017,32(2):24-32,9.
