摘要
目前,应用极化/去极化电流(PDC)法量化变压器油纸绝缘系统老化状态需深入研究,为了推动该研究工作,通过一系列加速热老化试验以及吸潮试验制备了不同老化状态和水分含量的油纸绝缘样品,测量了样品的PDC图谱;借助扩展Debye电路模型拟合了PDC图谱并获取了模型参数,在深入研究老化对Debye模型参数的影响规律后提出了时域介电特征量扩展Debye模型大时间常数来量化绝缘纸板老化状态。研究结果表明,扩展Debye模型大时间常数与绝缘纸板的聚合度存在较好的指数关系,但与样品的绝缘尺寸无关。
Since how to quantify the aging condition of transformer oil-paper insulation by PDC（Polarization and Depolarization Current） method needs further research,several oil-paper insulation specimens with different aging conditions and different moisture contents are prepared by a series of accelerated thermal aging and moisture absorption experiments, and their PDC diagrams are measured. The extended Debye model is adopted to fit the PDC diagram and the model parameters are obtained. The influence of oil-paper aging on the model parameters is studied,and the time-domain dielectric characteristic parameter,i.e. the large time constant of extend Debye model is proposed to quantify the aging condition of transformer pressboards. Results of research show that,there is better exponential relationship between the large time constant of extend Debye model and DP（Degree of Polymerization） and the large time constant is immune to the insulation size.
作者
刘捷丰
张镱议
徐建建
贾瑞
张冠军
柳立为
LIU Jiefeng ZHANG Yiyi XU Jianjian JIA Rui ZHANG Guanjun LIU Liweil(Shijiazhuang Power Supply Bureau of State Grid Hebei Electric Power Corporation,Shijiazhuang 050000,China Guangxi Key Laboratory of Power System Optimization and Energy Technology,Guangxi University,Nanning 510080 China Hebei Electric Power Dispatching and Control Center,Sbijiazhuang 050021 ,China Jining Power Supply Bureau of State Grid Shandong Electric Power Corporation,Jining 272100, China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2017年第3期197-202,共6页
Electric Power Automation Equipment
基金
广西自然科学基金资助项目(2015GXNSFBA139-235)
广西科技厅资助项目(AE020069)
广西教育厅资助项目(T3020097903)~~
关键词
变压器
油纸绝缘
极化/去极化电流
扩展Debye电路模型
大时间常数
定量评估
power transformers
oil-paper insulation
polarization/depolarization current
extend Debye model
large time constant
quantitative evaluation
