Charge vibration behaviour in polyimide under the pulse voltage with different rise and fall times
作者机构：Shandong Provincial Key Laboratory of UHV Transmission Technology and Equipment School of Electrical EngineeringShandong UniversityJinanChina UPSINPTCNRSLAPLACE(Laboratoire Plasma et Conversion d’Energie)University of ToulouseToulouseFrance
出 版 物：《High Voltage》 (高电压（英文）)
年 卷 期：2022年第7卷第1期
页 面：64-74页
核心收录：
学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：financed by the National Natural Science Foundation of China(Grant Nos.51907105 and U1966209) the Shandong Provincial Natural Science Foundation(Grant No.ZR2019QEE013)
主 题：pulse behaviour insulation
摘 要：High‐voltage electronic equipment is widely used in power systems,which normally operate under the pulse voltage ***,compared to DC or AC stress,the electrical insulation suffers a more severe ageing process under a pulse voltage with steep edges and so may cause electrical equipments to fail *** charge behaviour in polyimide under the pulse voltage with different edge times was investigated in this *** experimental results show that charges vibrate at the pulse edge,while the amplitude of charge vibration increases with decreasing edge ***,the detected vibration signal is strong within the nanosecond edge times,while being negligible in the microsecond ***,the amplitude of charge vibration at the falling edge is larger than that at the rising edge in the presence of the column‐plate *** is believed that the resultant force acting on the charge increases drasti-cally at the pulse edges,leading to the charge movement and the generation of ultra-sonic waves,with the resultant force becoming larger when the edge times *** vibration behaviour is harmful to the microstructure of insulation materials,and so it may be concluded that the rise and fall times of the pulse voltage play an important role in insulation failure.
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