高电压技术2017，Vol.43Issue(11)：3551-3558,8.DOI:10.13336/j.1003-6520.hve.20171031009
XLPE直流接地电树枝生长特性及形态结构
Grounded DC Tree Growth Characters and Propagation Structure in XLPE
摘要
Abstract
Electrical treeing is a significant feature of the insulation deterioration in XLPE.In order to elucidate the mechanism of grounded DC tree with positive and negative polarity,respectively,we analyzed tree growth characteristics and developing configuration.In addition,we introduced fractal dimension and the change rule of the parameter could quantitatively describe the notable discrepancies of the tree growth mechanism with different polarities.We also presented electrical channel partial voltage theory and tree point shielding mechanism to explain the electrical tree growth characteristics.It was found that polarity effect had a remarkable impact on the grounded DC tree.The growth rate had a burgeoning increase and erosion channel color was lighter under the positive environment,thus being obvious sparse-branch structure.However,the propagation direction presented the dispersion and tree tunnel was darker,eventually forming dense-branch configuration inversely.The results can provide theoretical references for the similar tests hereafter and HVDC cable safe operation potentially.关键词
直流接地电树枝/生长特性/分形维数/通道分压/尖端屏蔽/极性效应Key words
grounded DC tree/growth characters/fractal dimension/partial voltage/point shielding/polarity effect引用本文复制引用
刘云鹏,李演达,刘贺晨,郑新龙,傅明利..XLPE直流接地电树枝生长特性及形态结构[J].高电压技术,2017,43(11):3551-3558,8.基金项目
国家重点研发计划(2016YFB0900705) （2016YFB0900705）
中央高校基本科研业务费专项资金(2016SX92).Project supported by National Key Research and Development Program of China(2016YFB0900705),Fundamental Research Fund for the Central Universities(2016SX92). （2016SX92）
