广东电力2023，Vol.36Issue(11)：96-105,10.DOI:10.3969/j.issn.1007-290X.2023.11.010
考虑温差特性的导线疲劳损伤在线监测技术
Online Monitoring Technique for Fatigue Damages of Conductors Considering Temperature Difference Characteristics
摘要
Abstract
Aiming at the problem of broken strands of the overhead conductors in actual working conditions caused by the natural environment,a study on the fatigue damages of aluminum conductor steel reinforced(ACSR)strand breakage and steady-state temperature was carried out.Firstly,the LGJ-240/30 type wire was used as an example to build a current-carrying test of the damaged conductor,the temperature characteristics under different damage conditions was analyzed,and the temperature data were used to linearly fit the relationship between the local temperature of the damaged conductor and the broken strand.Next,the finite element model of the corresponding conductor was built,and the temperature characteristics of the damaged conductor section was simulated numerically by calculating the unit heat production rate of the damaged conductor.Using the temperature difference between the damaged conductor and the undamaged conductor,the relationship between the local temperature of the damaged conductor and the broken strand was fitted to verify the linear relationship obtained from the test.Finally,for the operating conditions of the conductor,the key operating parameters were determined by the theoretical study,and a structure based on the fatigue damage monitoring system for transmission lines was proposed.This system is applied in one 220 kV transmission line in Guangdong province and successfully detects fatigue damage state of the line in real time.关键词
架空导线/导线断股/温差特性/有限元分析/在线监测系统Key words
overhead conductor/broken strand of conductor/temperature difference characteristic/finite element analysis/online monitoring system分类
信息技术与安全科学引用本文复制引用
崔贾悦,赵隆,代鹏飞,杜燕,李晋..考虑温差特性的导线疲劳损伤在线监测技术[J].广东电力,2023,36(11):96-105,10.基金项目
陕西省重点研发计划项目(2023-YBGY-069) （2023-YBGY-069）
