电力工程技术2026，Vol.45Issue(4)：94-100,7.DOI:10.12158/j.2096-3203.2026.04.010
脱气处理对XLPE材料直流电树枝引发及生长的影响规律
The influence of degassing treatment on the initiation and growth of DC electrical treeing in XLPE material
摘要
Abstract
Cross-linked polyethylene(XLPE)cables generate cross-linking by-products such as acetophenone,cumyl alcohol,and α-methylstyrene during the manufacturing process.Under the influence of an electric field,these by-products dissociate,forming space charges that lead to the initiation and growth of electrical treeing,thereby reducing the insulation performance of the cables.Degassing treatment is considered one of the effective methods for reducing cross-linking by-products.However,the current selection of degassing time mainly relies on experience and lacks a unified standard.The effect of degassing time on the initiation and growth characteristics of electrical treeing in XLPE cables is experimentally investigated.Gas chromatography-mass spectrometry(GC-MS)is used to quantitatively analyze the changes in the volume fraction of cross-linking by-products.In conjunction with electrical treeing initiation and growth experiments,the mechanism by which cross-linking by-products influence the growth of DC electrical treeing is explored.The experimental results show that degassing treatment has a significant effect on reducing the volume fraction of all three cross-linking by-products,with α-methylstyrene exhibiting the most pronounced removal.The rate of decline in cross-linking by-product volume fraction varies at different stages of degassing.The reduction in cross-linking by-products makes the initiation and growth of electrical treeing more difficult.In practical industrial production,degassing should ensure that the volume fraction of cross-linking by-products is reduced to less than 20%of the initial level.A theoretical basis is provided for optimizing the degassing process of XLPE cables,and a reasonable degassing time is recommended for use in actual production to minimize cross-linking by-products,thereby enhancing the insulation performance and service life of the cables.关键词
交联聚乙烯(XLPE)/高压直流电缆/脱气处理/电树枝/交联副产物/空间电荷Key words
cross-linked polyethylene(XLPE)/high voltage direct current cable/degassing treatment/electrical treeing/cross-linking by-products/space charge分类
信息技术与安全科学引用本文复制引用
李柏雨,郑喆,张洪亮,赵谡,赵孝磊,尹毅..脱气处理对XLPE材料直流电树枝引发及生长的影响规律[J].电力工程技术,2026,45(4):94-100,7.基金项目
国家自然科学基金资助项目(52107019) （52107019）
