强激光与粒子束, 2014, 26 (4): 045049, 网络出版: 2014-04-24   

不同微槽结构绝缘子真空沿面闪络特性

Characteristics of grooved insulator flashover under pulsed voltage
作者单位
中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621900
摘要
针对单极性脉冲电压下不同微槽结构绝缘子真空沿面闪络特性开展实验研究。根据二次电子运动特性,设计了多种微槽宽度,对比了微槽结构和平面结构的绝缘子耐压特性差异。槽宽为1 mm的微槽样品耐压水平与平面结构样品耐压水平相当,槽宽小于1 mm的样品组耐压水平均高于平面结构样品,最高电压提高倍数约为1.4,说明一定尺寸范围内的微槽设计将提高绝缘子真空耐压水平。通过电场强度计算分析微槽结构对二次电子运动的影响过程可知,较大的微槽宽度可使电子限制在槽内运动,较小的微槽宽度将抑制初始电子的发展,最终二者都能达到抑制闪络的目的。通过显微镜观测各组样品表面特征,材料表面微观缺陷将可能降低材料耐压水平。
Abstract
The characteristics of grooved insulator flashover under pulsed voltage are discussed in this paper. The groove widths are determined by the secondary electron emission trajectory. The experiments results show that the flashover voltages increased while the insulator samples with 0.05 mm, 0.1 mm, or 0.7 mm wide grooves were used and the biggest voltage multiple was 1.4. The samples with 1 mm wide grooves had the same flashover voltage level as the flat ones. It is concluded that proper grooves design could increase the insulator flashover level by preventing the development of the secondary electron emission avalanche. Mechanism of inhibition was analyzed with calculation of electric field strength on the surface of insulator. Wider grooves, would trap the electrons and narrower ones would inhibit the motion of the initial electrons. Comparing the samples surface micrograms, a conclusion was given that the surface micro-flaw would drop the insulator flashover level.
参考文献

[1] 张冠军, 赵文彬, 郑楠, 等. 真空中固体绝缘沿面闪络现象的研究进展[J]. 高电压技术, 2007,33(7): 3-8.(Zhang Guanjun, Zhao Wenbin, Zheng Nan, et al. Research progress on surface flashover phenomena across solid insulation in vacuum. High Voltage Engineering, 2007, 33 (7): 3-8)

[2] Aanderson R A, Brainrad J P. Mechanism of pulsed surface flashover involving electron-stimulated desorption[J]. J Appl Phys, 1980, 51(3): 1414-1421.

[3] Boersch H, Hamisch H, Ehrlich W. Surface discharges across insulators in vacuum[J]. Z Angew Phys, 1963, 15(6): 518-525.

[4] Chang Chao, Liu Guozhi, Tang Chuanxiang, et al. Review of recent theories and experiments for improving high-power microwave window breakdown thresholds[J]. Phys Plasmas, 2011,18: 055702.

[5] 黄惠军, 常超, 侯青, 等. 真空条件下介质窗表面微波击穿试验[J]. 强激光与粒子束,2010,22(4): 845-848.(Huang Huijun, Chang Chao, Hou Qing, et al. Experimental studies on dielectric surface breakdown at vacuum conditions under high-power-microwave excitation. High Power Laser and Particle Beams,2010,22(4): 845-848)

[6] 张慧博, 杨建华, 程国新, 等. 刻槽结构高功率微波输出窗次级电子倍增效应[J]. 强激光与粒子束,2013,25(5): 1189-1194.(Zhang Huibo, Yang Jianhua, Cheng Guoxin, et al. Investigation on multipactor of high-power microwave window with grooves. High Power Laser and Particle Beams, 2013,25(5): 1189-1194)

[7] 程国新, 程新兵, 刘列, 等. 刻槽绝缘子真空表面闪络特性分析[J]. 强激光与粒子束,2012,24(4): 801-805.(Cheng Guoxin, Cheng Xinbing, Liu Lie, et al. Vacuum surface flashover of grooved dielectrics. High Power Laser and Particle Beams ,2012,24(4): 801-805)

[8] Katsumi K, Hidenori K, Tsugunari I, et al. Influence of surface charges on impulse flashover characteristics of alumina dielectrics in vacuum[J]. IEEE Trans Dielectrics and Electrical Insulation,2009,16(6): 1710-1716.

[9] 高巍. 高压纳秒脉冲下真空绝缘沿面闪络特性研究[D]. 北京: 中国科学院, 2005: 73.(Gao Wei. Investigation of surface flashover in vacuum under nanosecond high voltage. Beijing: Chinese Academy of Sciences, 2005: 73)

[10] 于开坤, 张冠军, 郑楠, 等. 真空中绝缘子闪络前表面带电现象的仿真研究[J]. 中国电机工程学报, 2009,29(4): 104-109.(Yu Kaikun, Zhang Guanjun, Zheng Nan, et al. Simulation of surface charging phenomena on insulator prior to flashover in vacuum. Proceedings of the CSEE, 2009, 29 (4): 104-109)

[11] 任成燕, 张东东, 袁伟群, 等. 纳秒脉冲下微堆层绝缘子的真空沿面闪络特性[J].强激光与粒子束,2009,21(11): 1745-1749.(Ren Chengyan, Zhang Dongdong, Yuan Weiqun, et al. Surface flashover characteristics of micro-stacked insulators in vacuum under nanosecond pulse. High Power Laser and Particle Beams,2009,21(11): 1745-1749)

[12] Eoin W. Vacuum surface flashover: A high-pressure phenomenon [J]. J Appl Phys, 1985,58(1): 132-141.

李逢, 王勐, 任靖, 方东凡, 康军军, 徐乐, 杨尊. 不同微槽结构绝缘子真空沿面闪络特性[J]. 强激光与粒子束, 2014, 26(4): 045049. Li Feng, Wang Meng, Ren Jing, Fang Dongfan, Kang Junjun, Xu Le, Yang Zun. Characteristics of grooved insulator flashover under pulsed voltage[J]. High Power Laser and Particle Beams, 2014, 26(4): 045049.

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