广东电力2025，Vol.38Issue(2)：57-65,9.DOI:10.3969/j.issn.1007-290X.2025.02.007
计及XLPE动态热参数特性的老化电缆载流量评估
Ampacity Assessment of Aging Cable Considering XLPE Dynamic Thermal Parameter Characteristics
摘要
Abstract
During the long-term operation of XLPE cables,insulation aging due to various disturbances like electrical,thermal,and mechanical factors significantly affects thermal performance and ampacity.To explore how insulation performs under electrocaloric effect and assess the ampacity of aging cable,a 480 day electric-thermal combined aging test was conducted on three 110 kV cables.Based on the test,samples from different aging stages(0,180 and 480 days)were obtained for analysis.In addition,a current-carrying temperature rise experiment was performed on sample cables to explore thermal characteristics of the aging cable insulation layer.According to the experimental data,the COMSOL was employed to evaluate ampacity for both double-loop trench laying cables and double-loop pipe laying cables.The results indicate that thermal resistance initially decreases,then increases with aging time.Additionally,the ampacity of both types of cables initially increases,then decreases with aging.However,the overall increase is not more than 4.95%,the decrease is not more than 3.2%,and the cable can still meet the requirements of operation and maintenance.关键词
交联聚乙烯电缆/加速老化/绝缘层/热阻率/载流量Key words
XLPE cable/accelerated aging/insulation layer/thermal resistance/ampacity.分类
信息技术与安全科学引用本文复制引用
张瀚,杨刚,庄颖璇,郑传义,赵一枫,刘刚..计及XLPE动态热参数特性的老化电缆载流量评估[J].广东电力,2025,38(2):57-65,9.基金项目
中国南方电网有限责任公司科技项目(GDKJXM20220228) （GDKJXM20220228）
广东省自然科学基金面上项目(2022A1515012523) （2022A1515012523）
