电力勘测设计Issue(1)：26-29,37,5.DOI:10.13500/j.dlkcsj.issn1671-9913.2025.01.006
某±800 kV特高压架空输电线路光缆覆冰事故分析
Analysis of Optical Cable Icing Accident on a±800 kV UHV Overhead Transmission Line
李志刚 1吕宝华 1王旭海 2赵丹 1马江波 1周文武3
作者信息
- 1. 中国电力工程顾问集团西北电力设计院有限公司,陕西 西安 710075
- 2. 国网陕西省电力有限公司建设分公司,陕西 西安 710065
- 3. 中国电力工程顾问集团西北电力设计院有限公司,陕西 西安 710075||武汉理工大学自动化学院,湖北 武汉 430070
- 折叠
摘要
Abstract
Affected by extreme freezing rain,snow and other severe weather,an ice-covered broken line accident occurred in the optical cable of a±800 kV UHV overhead transmission line.In this paper,the causes of wire breakage are analyzed from the perspectives of design verification,field investigation,metallographic and microscopic examination.It is concluded that the accident is mainly due to the lightning strike of the optical cable,the failure of the single wire ablation damage to eliminate the defect in time,and the superposition of freezing rain and icing,resulting in the super yield strength fracture of the mechanical properties of the optical cable.According to the reasons for the disconnection,it is proposed that the design stage should increase the identification of micro-topography and micro-meteorology,and the differentiated design should enhance intrinsic safety.The operation and maintenance unit should increase the line conductor and ground wire inspections according to the lightning strike near the line.关键词
架空输电线路/特高压/覆冰事故/冻雨Key words
overhead transmission line/ultra-high voltage/icing accident/freezing rain分类
信息技术与安全科学引用本文复制引用
李志刚,吕宝华,王旭海,赵丹,马江波,周文武..某±800 kV特高压架空输电线路光缆覆冰事故分析[J].电力勘测设计,2025,(1):26-29,37,5.
