A Study of Relationship between Space Charge formation and Breakdown in Low density Polyethylene under Ultra-high Electric Field

超高电场下低密度聚乙烯空间电荷形成与击穿关系的研究

基本信息

批准号：
18560315
负责人：
TANAKA Yasuhiro
金额：
$ 2.35万
依托单位：
Musashi Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

项目摘要

An electric power transmission cable using a crosslinked polyethylene(XLPE) as an insulating layer is widely used for AC power transmission system. However, it is not used for DC long distance cable because an unexpected breakdown sometimes occurs in the insulating layer under high DC stress. The reason for the unexpected breakdown is said that, so called, a space charge is accumulated in the bulk of insulating layer under high electric DC stress and it distorts the electric field distribution. While many researchers had attempted to find out the evidence of the above mechanism, any clear experimental result to show the mechanism directly had not been obtained. However, the authors have succeeded in observing a clear result that a huge packet-like space charge generates under ultra-high applied electric field and it distorts the electric field in the bulk of insulating layer. In this investigation, the authors to try the mechanism of the generation of the packet-like charge using a numerical analysis. Furthermore, the authors have tried to suppress to generate the packet-like charge by adding a nano-size filler in the insulating material. Finally, the authors find out that the deference of the permittivities between the filler and the base polymer material may be the reason for the suppression of packet-like charge generation.

采用交联聚乙烯(XLPE)作为绝缘层的电力传输电缆广泛用于交流电力传输系统。但它不用于直流长距离电缆，因为在高直流应力下绝缘层有时会发生意外击穿。据说意外击穿的原因是，在高直流应力下，绝缘层内部积聚了所谓的空间电荷，从而扭曲了电场分布。尽管许多研究人员试图找出上述机制的证据，但尚未获得任何明确的实验结果来直接证明该机制。然而，作者成功地观察到了一个清晰的结果：在超高的外加电场下，产生了巨大的包状空间电荷，并扭曲了大部分绝缘层中的电场。在这项研究中，作者利用数值分析尝试了包状电荷的产生机制。此外，作者试图通过在绝缘材料中添加纳米尺寸的填料来抑制产生包状电荷。最后，作者发现填料和基础聚合物材料之间的介电常数差异可能是抑制包状电荷产生的原因。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Space charge trapping in electrical potential well caused by permanent and induced dipoles for LDPE/MgO nanocomposite

DOI：
10.1109/t-dei.2008.4446746
发表时间：
2008-02-01
期刊：
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
影响因子：
3.1
作者：
Takada, Tatsuo;Hayase, Yuji;Okamoto, Tatsuki
通讯作者：
Okamoto, Tatsuki

Pulse Acoustic Technology for Measurement of Charge Distribution in Dielectric Materials for Spacecraft

DOI：
10.1109/tps.2006.883289
发表时间：
2006-10
期刊：
IEEE Transactions on Plasma Science
影响因子：
1.5
作者：
T. Takada;H. Miyake;Y. Tanaka
通讯作者：
T. Takada;H. Miyake;Y. Tanaka

Space Charge Formation in LDPE/MgO Nano-composite Thin Film under Ultra-high DC Electric Stress

DOI：
10.1541/ieejfms.126.1084
发表时间：
2006-06
期刊：
2006 IEEE 8th International Conference on Properties & applications of Dielectric Materials
影响因子：
0
作者：
Y. Hayase;H. Aoyama;Y. Tanaka;T. Takada;Y. Murata
通讯作者：
Y. Hayase;H. Aoyama;Y. Tanaka;T. Takada;Y. Murata

永久双極子と誘導双極子のポテンシャル井戸による空間電荷捕獲

永久偶极子和感应偶极子势阱的空间电荷捕获