Comparison Between Thermally Stimulated Discharge Method and Photo-stimulated Discharge Method for Measuring Space Charge Traps Energy  

作　　者：ZHU Zhi'en ZHANG Yewen AN Zhenlian ZHENG Feihu LEI Qingquan 

机构地区：[1]Department of Electrical Engineering, Tongji University, Shanghai 201804, China [2]NARI Group Corporation (State Grid Electric Power Research Institute), Nanjing 210003, China [3]State Key Laboratory Breeding Base of Dielectrics Engineering, Harbin University of Science and Technology, Harbin 150080, Chinat

出　　处：《高电压技术》2013年第8期1845-1851,共7页High Voltage Engineering

基　　金：Project supported by National Natural Science Foundation of China （51077101, 51277133）, National Basic Research Program of China （973 Program） （2009CB 724505）.

摘　　要：The space charge behavior of a dielectric under HVDC is influenced by the charge trap energy distribution in it. Hence, we in- vestigated the charge trap distributions in several kinds of typical polymer materials using thermally stimulated discharge (TSD) and photo-stimulated discharge (PSD) methods, respectively. The experimental results show that,there is a significant difference between the trap energy distributions obtained by the two methods, but the difference decreases with the increase of the melting point of polymers. This is attributed to the change of the trap center environment during TSD caused by the increasing movements of both main chains and branched chains in polymers. PSD method is more accurate for investigating charge trap distribution in dielectrics, especially for polymers with low melting points.The space charge behavior of a dielectric under HVDC is influenced by the charge trap energy distribution in it. Hence, we in- vestigated the charge trap distributions in several kinds of typical polymer materials using thermally stimulated discharge （TSD） and photo-stimulated discharge （PSD） methods, respectively. The experimental results show that, there is a significant difference between the trap energy distributions obtained by the two methods, but the difference decreases with the increase of the melting point of polymers. This is attributed to the change of the trap center env＇tronment during TSD caused by the increasing movements of both main chains and branched chains in polymers. PSD method is more accurate for investigating charge trap dislribution in dielectrics, especially for polymers with low melting points.

关 键 词：陷阱分布 空间电荷 热刺激放电 放电方法 光刺激 电法测量 电介质材料 能源 

分 类 号：TM211[一般工业技术—材料科学与工程] TN104.3[电气工程—电工理论与新技术]