Fracture mechanism and cause analysis of carbon fiber composite core conductor

doi:10.19936/j.cnki.2096-8000.20230428.016

Abstract

Abstract: In this paper, aiming at one fracture fault of the carbon-fiber composite core wire operated in a 220 kV transmission line, the non in-serviced (new) and broken carbon-fiber composite core wires were tested and analyzed by means of macro and micro morphology observations, X-ray energy spectrum detection, fourier infrared spectroscopy analysis, thermal decomposition experiment, compressive performance testing and so on, and the fracture causes and fracture mechanism were also investigated. The results indicate that the fracture of carbon-fiber composite core wire is mainly related to the fretting wear of glass fiber layer and fretting fatigue of carbon fiber core caused by breeze galloping. In addition, partial discharge is induced when the glass fiber layer is worn. And the high temperature and nitric acid produced during discharge lead to the melting of epoxy resin and stress corrosion of glass fiber, further aggravating the fracture of carbon fiber composite core. The fracture mechanism results reveal that the fracture process of carbon-fiber composite core wire can be divided into five stages. When the carbon fiber composite core is entirely broken, the load tension will exceed the allowable tension of T-shaped aluminum lines, resulting in cracking after short-time operation.

Key words: glass fiber, carbon fiber, discharge, fretting wear, fretting fatigue, crack

CLC Number:

TB332

ZHENG Jianjun, TIAN Feng, ZHANG Tao, CHEN Hao. Fracture mechanism and cause analysis of carbon fiber composite core conductor[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(4): 107-112.

References

[1] 程亮亮, 岳灵平, 沈伟强, 等. 碳纤维复合芯导线应用的常见问题分析及应对措施[J]. 机电信息, 2020(7): 29-31.
[2] XUE C F, WANG D H, TANG Y, et al. The line-broken analysis of the aluminum conductor composite core[J]. E3S Web of Conferences, 2019, 136(04039): 1-4.
[3] 姚建华, 魏静, 徐静, 等. 复合材料芯架空导线发展现状及展望[J]. 光纤与电缆及其应用技术, 2021(6): 10-13.
[4] 毛南平, 王煦, 卞荣. 碳纤维复合材料芯导线弧垂特性研究[J]. 电线电缆, 2021(3): 19-22.
[5] 张慧强. 输电线路碳纤维导线在基建项目中的应用[D]. 太原: 太原理工大学, 2020.
[6] 付沙威, 沈慧娟. 碳纤维材料综述[J]. 通化师范学院学报, 2012, 33(12): 21-22.
[7] 于广辉, 邓云坤. 碳纤维复合导线发展综述[J]. 热加工工艺, 2019, 48(20): 1-9.
[8] 兰逢涛, 陈新, 王英男, 等. 碳纤维复合芯导线舞动及扭转损伤特性研究[J]. 玻璃钢/复合材料, 2015(12): 79-81.
[9] 夏喜山, 周宏文, 吕琨璐. 一起220 kV线路跳闸事件分析[J]. 农村电气化, 2021(7): 28-29.
[10] 王煦, 黄国飞. 某铝包复合材料芯软铝型线绞线断裂原因分析[J]. 理化检验(物理分册), 2020, 56(4): 25-30.
[11] 张志刚, 张瑞永, 贾振宏. 碳纤维复合芯导线断线原因分析及预控措施[J]. 设备管理与维修, 2019(19): 158-159.
[12] 梁华贵. 一220 kV碳纤维导线断线分析及预控[J]. 中国电力教育, 2010(S1): 620-622.
[13] 刘纯, 陈红冬, 欧阳克俭, 等. 碳纤维复合芯导线耐张线夹断裂分析[J]. 中国电力, 2015, 48(10): 97-106.
[14] 碳/碳复合材料压缩性能试验方法: GB/T 34559—2017[S]. 北京: 中国标准出版社, 2018.
[15] 卢明, 张中浩, 李黎, 等. 复合绝缘子酥朽发热老化的原因分析[J]. 电网技术, 2018, 42(4): 1335-1341.
[16] 梁曦东, 高岩峰. 复合绝缘子酥朽断裂研究(一): 酥朽断裂的主要特征、定义及判据[J]. 中国电机工程学报, 2016, 36(17): 4778-4786.
[17] 程基伟, 王天民. 取向玻璃纤维增强塑料的应力腐蚀开裂研究[J]. 复合材料学报, 2004(6): 39-46.
[18] 程基伟. 玻璃钢的应力腐蚀[M]. 北京: 化学工业出版社, 2009.
[19] TAI N H, MA C H, WU S H. Fatigue behaviour of carbon fibre/PEEK laminate composites[J]. Composites, 1995, 26(8): 551-559.
[20] LOEWENSTEIN K L. The manufacturing technology of continuous glass fibers[M]. Amsterdam: Elsevier, 1973.
[21] LEE H, NEVILLE K. Handbook of epoxy resins[M]. New York: McGraw-Hill, 1967.
[22] YOU C Y. Study on galloping stability mechanism of conductor and its application to anti-galloping of transmission Lines[J]. Electricity, 2005(1): 26-30.
[23] 张博, 马杰, 刘博, 等. 碳纤维复合芯导线的舞动特性及受损特征分析[J]. 电瓷避雷器, 2018(4): 230-234.
[24] 李林. 输电线的微动磨损接触分析及微动疲劳研究[D]. 武汉: 华中科技大学, 2017.
[25] LUTZ B, CHENG L, GUAN Z. Analysis of a fractured 500 kV composite insulator-identification of aging mechanisms and their causes[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2012, 19(5): 1723-1730.