摘要
风能作为一种清洁能源,近年来日益受到重视,大量风电机组被安装运行。某风机叶片避雷线缆发生断裂,导致避雷系统无法正常工作,影响风电机组运行安全。为探究避雷线缆断裂失效原因,通过对断口的宏观与微观观察、能谱分析、金相检验以及对断口附近受力状态的数值模拟,并结合化学、力学检测项目开展综合分析。结果表明:避雷线缆固定不当使受力情况变得严峻,其内部所受应力较高的铜丝首先发生疲劳断裂,后续雷击导致电路载荷过大,致使其余铜丝熔断,最终造成线缆断裂。
In recent years,wind energy has gained significant attention as a clean energy source,with a large number of wind turbines being installed and operated.A lightning protection cable in a wind turbine blade broke,causing the lightning protection system disable to run.To investigate the root causes of these cable failures,a comprehensive analysis was conducted,involving macroscopic and microscopic observations of the fractures,energy spectrum analysis,metallographic examination,and numerical simulations of the stress distribution near the fractures,complemented by chemical and mechanical testing.The results indicate that improper fixation of the lightning protection cable led to severe stress conditions.The copper wires with higher internal stress first experienced fatigue fracture,followed by excessive electrical load caused by subsequent lightning strikes,which led to the fusing of the remaining copper wires,ultimately resulting in the cable fracture.
作者
裴恺
杨新户
王安友
祁永东
徐鑫
杨光
PEI Kai;YANG Xinhu;WANG Anyou;QI Yongdong;XU Xin;YANG Guang(Zhejiang Guojian Testing Technology Co.,Ltd.,Jiaxing 314300,China;Wind Power Division of CRRC Zhuzhou Electric Locomotive Research Institute Co.,Ltd.,Zhuzhou 412000,China)
出处
《电工材料》
2025年第4期20-23,共4页
Electrical Engineering Materials
基金
2024年度中国仪器仪表学会科学仪器托举计划项目(CIS海豚计划:CISTJ202408)。
关键词
避雷线缆
断裂
熔化
风电
失效分析
lightning protection cable
fracture
fusion
wind power
failure analysis
