牵引变压器绝缘介电特性模拟与老化分析  

Dielectric characteristics modeling and aging analysis of traction transformer insulation

作　　者：唐伟 刘圳 徐玮宏 闫东旭 张艳丽[2] TANG Wei;LIU Zhen;XU Weihong;YAN Dongxu;ZHANG Yanli(Locomotive Development Department,Dalian Locomotive and Rolling Stock Co.,Ltd.,Dalian 116022,China;School of Electrical Engineering,Shenyang University of Technology,Shenyang 110087,China)

机构地区：[1]中车大连机车车辆有限公司机车开发部,辽宁大连116022 [2]沈阳工业大学电气工程学院,辽宁沈阳110087

出　　处：《电工电能新技术》2025年第1期1-9,共9页Advanced Technology of Electrical Engineering and Energy

摘　　要：牵引变压器作为电力机车运行系统中不可或缺的电力设备,其运行状态决定了电力机车能否安全、正常运行。牵引变压器因运行时间等工作环境不同于电力变压器,有效模拟分析和预估油纸绝缘老化状态对牵引变压器的安全运行有着重要的意义。本文基于宽频介电谱仪实验测量了油浸绝缘纸样品在加速热老化情况下的介电特性,采用Davidson-Cole模型实现了复介电常数模型建立,并求取了模型参数。通过建立加速热老化下绝缘聚合度、介电损耗与老化时间的定量对应关系,构建了以介电损耗为特征量的老化预估曲线和模型,为分析牵引变压器绝缘老化情况提供了相关的实验数据和数学模型。Traction transformer is an indispensable power equipment in the operation system of electric locomotive,and its operation state determines whether the electric locomotive can run safely and normally.The effective simulation analysis and estimation of the aging status of oil paper insulation are of great significance for the safe operation of traction transformers,as the operating environment of traction transformers is different from that of power transformers due to their different operating times and other factors.In this paper,an accelerated thermal aging test was carried out on oil-immersed insulating paper samples to measure their dielectric properties under accelerated thermal aging condition.The Davidson-Cole model was employed to establish the complex dielectric constant and the parameters of the model were obtained.By establishing the quantitative relationship between the polymerization degree of solid insulation,dielectric loss and aging time under accelerated thermal aging,the aging prediction curve and model with dielectric loss as the characteristic quantity were constructed,which provided relevant experimental data and mathematical model for the effective prediction of traction transformer insulation aging.

关 键 词：牵引变压器 绝缘材料 介电特性 介电损耗 介电谱 

分 类 号：TM421[电气工程—电器]