中国电机工程学报2017，Vol.37Issue(6)：1835-1842,8.DOI:10.13334/j.0258-8013.pcsee.161284
一种适用于高温条件下的电声脉冲法空间电荷测量系统
An Improved Pulsed Electro-acoustic Setup For Space Charge Measurement at High Temperatures
摘要
Abstract
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.关键词
空间电荷/电声脉冲法/高温/压电传感器/校正Key words
space charge/pulsed electro-acoustic method/high temperature/piezoelectric transducer/correction分类
信息技术与安全科学引用本文复制引用
宁鑫,彭宗仁,刘鹏,张宏亮,冯骅,贾志杰,曹永兴,朱轲..一种适用于高温条件下的电声脉冲法空间电荷测量系统[J].中国电机工程学报,2017,37(6):1835-1842,8.基金项目
国家自然科学基金项目(51207123) （51207123）
国网四川省电力公司研究开发项目(521997140025).Project Supported by National Natural Science Foundation of China (51207123) （521997140025）
State Grid Sichuan Electric Power Research Institute (521997140025). （521997140025）
