An Improved Pulsed Electro-acoustic Setup For Space Charge Measurement at High Temperatures

被引：0
|
作者：
Ning X. [1 ]
Peng Z. [2 ]
Liu P. [2 ]
Zhang H. [2 ]
Feng H. [2 ]
Jia Z. [1 ]
Cao Y. [1 ]
Zhu K. [1 ]
机构：
[1] State Grid Sichuan Electric Power Research Institute, Chengdu, 610072, Sichuan Province
[2] State Key Laboratory of Electrical Insulation and Power Equipment (Xi'an Jiaotong University), Xi'an, 710049, Shaanxi Province
来源：
| 1835年 / Chinese Society for Electrical Engineering卷 / 37期
基金：
中国国家自然科学基金;
关键词：
Correction; High temperature; Piezoelectric transducer; Pulsed electro-acoustic method; Space charge;
D O I：
10.13334/j.0258-8013.pcsee.161284
中图分类号：
学科分类号：
摘要：
The temperature plays an important role on charge transport characteristics in dielectrics as well as charge injection behavior between electrodes and dielectrics; it is of great significance to study the space charge behaviors of polymeric insulation materials at high temperature. An improved pulsed electro-acoustic measurement system has been developed based on a new type piezoelectric transducer called polyvinylidene fluoride-trifluoroethylene which has a high Curie point. The R-C couping circuit has been separated from the heating part to eliminate the damage caused by high temperature, and the signal amplifier as well. Factors which determine the transducer output voltage signal and final space charge density have been studied based on the principle of pulsed electro-acoustic method. The temperature dependence of sound velocity as well as relative permittivity has been measured. At last, correction of the temperature effect on the measurement system has been carried out. Effects of temperature on space charge distribution in pure epoxy resin have been investigated. © 2017 Chin. Soc. for Elec. Eng.
引用
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页码：1835 / 1842
页数：7
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