中国电力2013，Vol.46Issue(7)：72-76,5.
自然雷电下氧化锌避雷器残压特征分析
Analysis on Characteristics of Residual Voltage in ZnO SPD Based on Natural Lightning
摘要
Abstract
The waveform characteristics of residual voltage in ZnO surge protective devices (SPD) based on natural lightning is investigated.Analyzing the waveform characteristics of SPD results from 12 records of natural lightning through the variation of the line over-voltage and fast electric field.The results show that the duration of residual voltage for SPD is about 330 μs on the condition of the natural lightning,which is longer than the value of dozens of microseconds generated by the standard 8/20 μs test waveform current in the laboratory,and the piezoresistor can be melted and punctured if the current of excessive wide waveform is used.Secondly,the waveform of residual voltage in SPD with the major irregular characteristic is closely related to the lightning discharge.Furthermore,there is some inhibition effect on the over-voltage of the 50 m front-end underground line by the SPD.The inhibition effect is weak during the first return stroke,but strong during the subsequent return stroke.关键词
残压/氧化锌避雷器/雷电/过电压Key words
residual voltage/ ZnO surge protective devices (SPD)/ natural lightning/ over-voltage分类
信息技术与安全科学引用本文复制引用
颜旭,陈绍东,江润志,尹娜..自然雷电下氧化锌避雷器残压特征分析[J].中国电力,2013,46(7):72-76,5.
