基于介电频谱的机车车辆低压控制电缆绝缘老化评估  

Insulation Aging Assessment of Low-Voltage Control Cables for Railway Vehicles Based on Dielectric Spectroscopy

作　　者：朱旭东 崔杰 胡诚成 ZHU Xudong;CUI Jie;HU Chengcheng(State Key Laboratory of High-Efficiency Special Cable Technology,Shanghai Cable Research Institute,Shanghai 200093,China;CRRC Qingdao Sifang Co.,Ltd.,Qingdao 266000,China)

机构地区：[1]上海电缆研究所有限公司高效能特种电缆技术全国重点实验室,上海200093 [2]青岛四方机车有限公司,青岛266000

出　　处：《电线电缆》2025年第4期46-52,共7页Wire & Cable

摘　　要：为了研究机车车辆低压控制电缆绝缘材料的老化特性,利用加速热老化试验和介电频谱分析方法评估其绝缘性能。研究结果揭示了绝缘材料耗散因数随频率变化的规律,显示其在低频区(0.002~1 Hz)对老化高度敏感;在老化过程中,绝缘材料耗散因数上升,其绝缘性能下降;同时,文中建立了耗散因数与断裂伸长率的相关性模型,验证了绝缘材料耗散因数评估绝缘老化的可靠性。介电频谱测试为无损检测,可为电缆安全运行提供新方法和技术支持,具有广阔的应用前景。To investigate aging characteristics of insulation materials used in low-voltage control cables for railway vehicles,insulation performance was evaluated through accelerated thermal aging tests combined with dielectric spectroscopy analysis.Results revealed the relationship between dissipation factor of insulating materials and frequency,especially the high sensitivity to aging in the low-frequency range(0.002~1 Hz).During aging process,the increase of dissipation factor indicated a decline in insulation performance.Additionally,a correlation model between dissipation factor and elongation at break was established,verifying the reliability of using dissipation factor to assess insulation aging.Dielectric spectroscopy test is a non-destructive inspection,which can provide new methods and technical support for the safe operation of cables,and it has broad application prospects.

关 键 词：机车车辆低压控制电缆 绝缘老化 介电频谱分析 耗散因数 无损检测 

分 类 号：TM246[一般工业技术—材料科学与工程] U260.49[电气工程—电工理论与新技术]