基于全能量法的ZnO压敏电阻多片并联能量吸收特性分析  

Analysis on Energy Absorption Capability of ZnO Varistors in Multiple Parallel Based on Total Energy Method

作　　者：李祥超[1] 陈璞阳 周中山[1] 叶挺[1] 陈则煌[1] 刘艳[1] 

机构地区：[1]南京信息工程大学中国气象局气溶胶-云-降水重点开放试验室,南京210044

出　　处：《电瓷避雷器》2015年第6期56-62,68,共8页Insulators and Surge Arresters

基　　金：国家自然科学基金项目(编号:41075025)

摘　　要：针对ZnO压敏电阻多片并联时能量吸收的问题,基于全能量分析法,通过改变ZnO压敏电阻的并联片数及压敏电压的大小,对多片并联的ZnO压敏电阻进行8/20μs波形冲击试验,可以得出以下结论:多片压敏电阻并联时,各片压敏电阻的吸收能量随着冲击电压的上升而呈现线性增长的趋势,且压敏电阻相互间的压敏电压越接近,吸收能量越均匀,该现象可以由空穴诱导隧道击穿理论解释;能量吸收比随着冲击电压的增加呈现出线性递减的趋势,从能量释放角度证明了多片并联的压敏电阻可以有效保护后级设备,对实际应用具有一定的参考价值意义。In order to research the energy absorption capability of ZnO varistors in parallel, based on the analysis of total energy method, by means of changing ZnO varistors＇ number in parallel and the range of reference voltages, the ZnO Varistors in parallel were impacted by 8/20μs impulse current. Through the impact experiments, the conclusions are that： When the ZnO varistors are in parallel, the energy that every varistor absorbs takes on a linear growing trend with the rising impact voltage, and the closer of the reference voltages are, the more uniform energy will be absorbed by every ZnO Varitor. This phenomenon can be explained by the theory of Hole Induced Tunnelling. Beside, the energy absorption rate takes on a linear decreasing trend with the increasing impact voltage, and this can prove the effective protection of ZnO varistors in parallel to the after-class apparatuses from the view of energy release, which has a certain value in the practical application.

关 键 词：ZNO压敏电阻 能量吸收 全能量法 空穴诱导击穿 

分 类 号：TM862[电气工程—高电压与绝缘技术]