The Space Charge Effect on the Discharge Current in Cross-Linked Polyethylene under High AC Voltages
The Space Charge Effect on the Discharge Current in Cross-Linked Polyethylene under High AC Voltages
复制标题
高交流电压下空间电荷对交联聚乙烯放电电流的影响
DOI：
10.1143/jjap.42.7576
复制
发表时间：
2003
影响因子：
1.5
通讯作者：
M. Han
中科院分区：
文献类型：
--
作者：
Yoon;S. Hwangbo;June;D. Yi;M. Han
固体电介质中的空间电荷分布通常通过脉冲电声（PEA）方法进行研究。然而，以往的研究大多仅限于直流电压下的唯象分析。在我们的研究中，通过改进的 PEA 方法，使用交流电压测量了交联聚乙烯 (XLPE) 中的空间电荷分布。同时，测量了气隙中的流光放电，以研究空间电荷和放电电流之间的关系，并将该关系适用于介质阻挡放电的情况。在高交流电压下，放电电流增加到临界点，但超过临界电压后不再表现出进一步的增加，并且放电模式由空间电荷决定。这一结果表明，在适应介质阻挡放电方面，介质材料的频率效应和空间电荷特性优于电压效应。结果很好地解释了空间电荷对局部放电的影响和介质阻挡放电现象。
The space charge distributions in solid dielectrics have been usually investigated by means of the pulsed electroacoustic (PEA) method. However, most previous studies have been limited to the phenomenological analysis under DC voltages. In our study, the space charge distribution in cross-linked polyethylene (XLPE) has been measured using AC voltages by means of the modified PEA method. Simultaneously, the streamer discharges in an air gap have been measured in order to investigate the relationship between space charge and discharge current, and the relationship has been adapted to the case of dielectric barrier discharge. At high AC voltages, discharge current increases to the critical point, but no further increase is exhibited over the critical voltage and the discharge pattern is resolved by the space charge. This result indicates that the frequency effect and space charge characteristics of dielectric materials are preferred to the voltage effect in the adaptation to dielectric barrier discharge. The results well explain the space charge effect on partial discharge and the dielectric barrier discharge phenomenon.