HEMP作用下油纸绝缘工频局放特性  

Partial Discharge Characteristics of Oil-Paper Insulation at Working Frequency Under HEMP Impact

作　　者：樊冉阳 李斯盟 秦锋 杨宇翔 崔树群 FAN Ranyang;LI Simeng;QIN Feng;YANG Yuxiang;CUI Shuqun(State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;National Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Xi’an 710024,China;School of Physics&Information Technology,Shaanxi Normal University,Xi’an 710119,China)

机构地区：[1]电工材料电气绝缘全国重点实验室西安交通大学,西安710049 [2]强脉冲辐射环境模拟与效应全国重点实验室,西安710024 [3]陕西师范大学物理学与信息技术学院,西安710119

出　　处：《现代应用物理》2024年第6期195-201,共7页Modern Applied Physics

基　　金：强脉冲辐射环境模拟与效应全国重点实验室开放基金资助项目(SKLIPR2114);国家自然科学基金资助项目(52007148,12305306)。

摘　　要：目前局部放电已作为绝缘状态质量监控的重要指标,根据变压器内部油纸绝缘的局部放电特性以及发展规律,对高空电磁脉冲(high altitude electromagnetic pulse,HEMP)损伤配电变压器后的工频剩余寿命评估提供数据支撑,本文通过针板电极结构在HEMP传导环境作用下,以千伏为单位的不同HEMP测量电压幅值和不同冲击次数来刻画不同损伤状态的油纸试品,进行油纸绝缘的工频放电特性研究,统计分析局部放电的宏观规律,进而在宏观角度揭示纳秒脉冲作用下的油浸纸损伤机理,即当纳秒脉冲达到一定幅值或一定冲击次数时,会使绝缘纸内部纤维松散,从而产生较为密集的龟裂,使其绝缘性能严重下降。The partial discharge is widely regarded as an important index for insulation state monitoring at home and abroad.In this paper,the discharge characteristics of oil-paper insulation at working frequency under HEMP impact are studied by taking the oil-papers under different HEMP amplitudes and different impact times as examples under the condition of positive and negative HEMP of needle-plate electrode structure.The macroscopic law of partial discharge is statistically analyzed,and the damage mechanism of oil-papers under the action of nanosecond pulse is revealed from the macro perspective.The results show that when the nanosecond pulse reaches a certain amplitude or a certain number of impacts,the internal fibers of the insulating paper will be loose,resulting in more intensive cracks,which will seriously reduce its insulation performance.

关 键 词：油纸绝缘 局部放电特性 配电变压器 高空电磁脉冲 损伤状态 

分 类 号：TM406[电气工程—电器] TL91[核科学技术—核技术及应用]