中国电机工程学报2016，Vol.36Issue(2)：570-576,617,8.DOI:10.13334/j.0258-8013.pcsee.2016.02.031
双层介质的电声脉冲法空间电荷波形恢复
Recovery of Space Charge Waveform in Multi-layer Dielectrics by Means of the Pulsed Electro-acoustic Method
摘要
Abstract
This paper presented a space charge waveform recovery method in multi-layer dielectrics by means of the pulsed electro-acoustic (PEA) method, based on the analysis of the electrically-induced pressure distribution and acoustic wave propagation. The validity of the recovery method was verified by its application to the PEA signal recovery of low density polyethylene/ethylene propylene rubber double-layer sample. According to the theoretical analysis, the electrostatic pressure in PEA measurement of double-layer sample is mainly caused by discontinuity of the permittivity on dielectric interface, the bulk space charge and the interfacial charge. The acoustic waves detected at the sensor are different from the theoretical analysis, due to the intrinsic characteristic of measurement system, the wave attenuation at lossy material as well as the transmission and reflection at the dielectric interface. The transfer function of the system and the attenuation coefficient can be obtained through the reference waveform measured at low field immediately after voltage applied. Subsequently, the space charge waveform in multi-layer dielectric can be recovered. It is shown by the treatment results that this method can not only recover the charge peak at the electrodes, but also recover the charge in the bulk and at the dielectric interface. This provides the basis for the study of space charge property in multi-layer dielectrics.关键词
电声脉冲法/空间电荷/双层介质/波形恢复Key words
pulsed electro-acoustic method/space charge/multi-layer dielectric/waveform recovery分类
信息技术与安全科学引用本文复制引用
兰莉,尹毅,吴建东..双层介质的电声脉冲法空间电荷波形恢复[J].中国电机工程学报,2016,36(2):570-576,617,8.基金项目
高等学校博士学科点专项科研基金(20120073110019) （20120073110019）
国家自然科学基金(51327002). The Research Fund for the Doctoral Program of Higher Education (20120073110019) （51327002）
The National Natural Science Foundation of China (NSFC)(51327002). （NSFC）
