Space Charge Behavior in Polyethylene Under DC High Electric Fields
Space Charge Behavior in Polyethylene Under DC High Electric Fields
复制标题
直流高电场下聚乙烯的空间电荷行为
DOI：
10.1541/ieejfms1990.117.4_355
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
T. Okamoto
中科院分区：
文献类型：
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作者：
N. Hozumi;T. Takeda;H. Suzuki;T. Okamoto
直流电强电场下聚乙烯的空间电荷行为Naohiro Hozumi，成员，Toshinao Takeda，成员，Hiroshi Suzuki，成员，Tatsuki Okamoto，成员（中央电力工业研究所）本报告研究直流电强电场下聚乙烯的空间电荷行为。采用脉冲电声方法直接观察了高电场作用下3mm厚交联聚乙烯电缆绝缘中的时变空间电荷分布。当平均直流电场高达1MV/cm时，观察到包状空间电荷的间歇产生及其通过绝缘的传播。这种现象在XLPE和LDPE（低密度聚乙烯）的薄片样品中重现。结果表明，苯乙酮在LDPE试样中扩散时容易产生包电荷，但苯乙酮的分布过于均匀阻碍了包电荷的产生。几个实验结果表明，绝缘的局部电离引起包电荷的产生。基于上述概念进行了数值模拟，再现了这一现象。
Space Charge Behavior in Polyethylene Under DC High Electric Fields Naohiro Hozumi, Member, Toshinao Takeda, Member, Hiroshi Suzuki, Member, Tatsuki Okamoto, Member (Central Research Institute of Electric Power Industry) This report deals with the space charge behavior in polyethylene u der high DC fields. Direct observation of time-dependent space charge profiles in3mm thick XLPE (cross-linked polyethylene) cable insulation under high electric fields was done using the pulse-electroacoustic method. An intermittent generation f packet shaped space charges and their propagation through the insulation were observed when the average DC field was as high as 1MV/cm. This phenomenon was reproduced in sheet specimens with XLPE and with LDPE (low-density polyethylene). It was indicated that the packet charge is easy to appear when the acetophenone was diffused into the LDPE specimen, however, too uniform distribution of acetophenone prevents the packet charge generation. Itwas suggested from several expremental results that the local ionization n the insulation brings the packet charge generation. A numerical simulation was carried out based on the above conception toreproduce the phenomenon.