中国电机工程学报2025，Vol.45Issue(12)：4917-4926,中插33,11.DOI:10.13334/j.0258-8013.pcsee.240249
单组份硅橡胶基修复剂的高压电缆缓冲层缺陷修复及可靠性研究
Repair of High Voltage Cable Buffer Layer Defects and Reliability Study of One-component Silicone Rubber-based Repair Agent
摘要
Abstract
High-voltage cable buffer layer ablation faults have occurred frequently in recent years,seriously threatening the safe operation of high-voltage cables,and thus the ablation faults repair technology is urgently needed.In order to repair the ablation faults,a one-component silicone-rubber-based repair agent is prepared in this paper.The effectiveness and mechanism of the repair agent are explored by both the ablation experiment on real cable and the electric field simulation.The effect of the repair agent on the aluminum sheath and shielding layer is analyzed by electrochemical measurements and element distribution tests.The repaired buffer layer achieves compliant volume resistivity and shows no ablation traces upon retesting.The electrical conductivity also remains stable during the ablation test.In addition,the repair agent effectively reduces the current concentration and the electric field distortion in the buffer layer.The maximum current density in the buffer layer is reduced from 40.40 A/m2 to 0.05 A/m2,and the maximum field strength in the air gap is reduced from 7.91×104 kV/m to 1.39×10-2 kV/m.Therefore,the buffer layer ablation fault is effectively eliminated.Moreover,the corrosion rate of aluminum even in the uncured repair agent is only 5.4×10-3 mm/a,and the Si element content in the surface of shielding treated with cured repair agent is only 1.0%.Therefore,the repair agent would not promote the electrochemical corrosion of the aluminumsheath and swelling of the shielding layer,showing a the high reliability of repair agent in the cable.The results of this paper could promote the repair of ablated buffer layers in high-voltage cables.关键词
高压电缆/缓冲层烧蚀/修复剂/模拟烧蚀实验/电场仿真/电化学腐蚀Key words
high-voltage cables/buffer layer ablation/repair agent/simulated ablation experiments/electric field simulation/electrochemical corrosion分类
动力与电气工程引用本文复制引用
葛洲,武康宁,赵鸽,张浩然,张可,高建,李博达,任志刚,李建英..单组份硅橡胶基修复剂的高压电缆缓冲层缺陷修复及可靠性研究[J].中国电机工程学报,2025,45(12):4917-4926,中插33,11.基金项目
国家电网有限公司科技项目(5108-202218280A-2-353-XG). Project Supported by the Science and Technology Project of State Grid Corporation of China(5108-202218280A-2-353-XG). （5108-202218280A-2-353-XG）
