Experimental research on influencing factors of surface flashover of coaxial insulators in high-pressure SF6 under nanosecond pulse
-
摘要: 研究纳秒脉冲下的绝缘子沿面闪络影响因素对电磁脉冲模拟装置绝缘结构设计具有重要的借鉴意义。通过搭建绝缘子沿面闪络实验平台，实验研究了在0.5 MPa的SF6气体中，脉冲电压波形、绝缘材料和绝缘子沿面场强分布对绝缘子沿面闪络电压的影响。结果表明：绝缘子的闪络电压具有随着脉冲前沿时间减小而增加的趋势；相较于脉冲电压全波，绝缘子在脉冲电压前沿波形耐受下闪络电压较高；聚酰亚胺材料的绝缘性能最好；通过降低绝缘子沿面最大场强，改善电场分布可以有效地提高绝缘子的闪络电压。
-
关键词:
- 纳秒脉冲 /
- 沿面闪络 /
- 绝缘材料 /
- 沿面场强 /
- 聚酰亚胺
Abstract: Studying the influencing factors of insulator flashover under nanosecond pulse has important reference significance for the design of insulation structure of electromagnetic pulse simulation device. By building an experimental platform for insulator flashover, the effects of pulse voltage waveform, insulating material and surface field strength distribution on the insulator surface flashover voltage were experimentally studied in 0.5 MPa SF6 gas. The results show that the flashover voltage of the insulator tends to increase with the decreasing of the pulse front time; Compared with the full pulse voltage wave, the flashover voltage of insulator is higher under the front waveform of pulse voltage; The insulation performance of the polyimide material is optimal; By reducing the maximum field strength along the insulator surface and improving the electric field distribution, the flashover voltage of the insulator can be effectively increased.-
Key words:
- nanosecond pulse /
- surface flashover /
- insulation materials /
- field strength along the surface /
- polyimide
-
图 1 盆形绝缘子材料试样图
Figure 1. Specimen of the basin insulator materials
下载:
全尺寸图片
幻灯片
图 2 盆形绝缘子试样及电极结构剖面示意图
Figure 2. Schematic cross-section of the basin-shaped insulator sample and electrode structure
下载:
全尺寸图片
幻灯片
图 3 实验平台示意图
Figure 3. Schematic diagram of the experimental platform
下载:
全尺寸图片
幻灯片
图 4 绝缘子试品上三种前沿的全波脉冲电压波形图
Figure 4. Full-wave pulse voltage waveforms of the three leading edges on the insulator sample
下载:
全尺寸图片
幻灯片
图 5 绝缘子开关配合结构示意图
Figure 5. Schematic diagram of the structure of the insulator switch used together
下载:
全尺寸图片
幻灯片
图 6 绝缘子试品上三种前沿的电压波形图
Figure 6. Voltage waveforms of the three frontiers on the insulator sample
下载:
全尺寸图片
幻灯片
图 7 典型闪络电压电流波形图
Figure 7. Typical flashover voltage and current waveform
下载:
全尺寸图片
幻灯片
图 8 三种全波脉冲电压下盆形和盘形绝缘子试样的闪络电压
Figure 8. Flashover voltages of basin-shaped and disc-shaped insulator samples under three full-wave pulse voltages
下载:
全尺寸图片
幻灯片
图 9 盆形和盘形绝缘子试样的电场分布云图
Figure 9. Cloud diagram of electric field distribution of basin-shaped and disc-shaped insulator samples
下载:
全尺寸图片
幻灯片
图 10 绝缘子试样的沿面切向和法向电场分布图
Figure 10. Electric field distribution along the plane of the insulator sample in the tangential and normal directions
下载:
全尺寸图片
幻灯片
图 11 盆形绝缘子电场改善前后闪络电压对比图
Figure 11. Comparison of flashover voltage before and after electric field improvement of basin-shaped insulators
下载:
全尺寸图片
幻灯片
图 12 盆形绝缘子闪络电压与波形前沿时间关系图
Figure 12. Relationship between flashover voltage and waveform front time of basin-shaped insulators
下载:
全尺寸图片
幻灯片
图 13 脉冲全波和脉冲前沿电压下盆形绝缘子耐受的闪络电压对比图
Figure 13. Comparison of flashover voltages of basin-shaped insulators under pulsed full-wave and pulsed frontier voltages
下载:
全尺寸图片
幻灯片
表 1 不同材料的绝缘子闪络电压对比
Table 1. Comparison of flashover voltages of insulators with different materials
insulator
materialflashover voltage/kV proportion/% flashover voltage/kV proportion/% flashover voltage/kV proportion/% tr=40 ns tr=65 ns tr=105 ns nylon 506.7 100.0 470.0 100.0 423.0 100.0 PMMA 497.9 98.3 535.1 113.8 477.9 113.0 PI 578.3 114.1 560.7 119.3 518.0 122.5
下载:
参考文献(15) [1] 冯寒亮, 刘逸飞, 刘峰. 美国海军全舰电磁脉冲模拟器发展综述[J]. 中国舰船研究, 2020, 15(5):69-78 doi: 10.19693/j.issn.1673-3185.01722Feng Hanliang, Liu Yifei, Liu Feng. An overview on the development of the U. S. navy full ship electromagnetic pulse simulators[J]. Chinese Journal of Ship Research, 2020, 15(5): 69-78 doi: 10.19693/j.issn.1673-3185.01722 [2] 谢彦召, 王赞基, 王群书, 等. 高空核爆电磁脉冲波形标准及特征分析[J]. 强激光与粒子束, 2003, 15(8):781-787Xie Yanzhao, Wang Zanji, Wang Qunshu, et al. High altitude nuclear electromagnetic pulse waveform standards: a review[J]. High Power Laser and Particle Beams, 2003, 15(8): 781-787 [3] 林海丹, 刘熊, 梁义明, 等. 绝缘材料沿面闪络发展特性的研究进展[J]. 绝缘材料, 2015, 48(7):1-8 doi: 10.3969/j.issn.1009-9239.2015.07.001Lin Haidan, Liu Xiong, Liang Yiming, et al. Research progress in surface flashover development characteristic of insulating materials[J]. Insulating Materials, 2015, 48(7): 1-8 doi: 10.3969/j.issn.1009-9239.2015.07.001 [4] 刘锡三. 高功率脉冲技术[M]. 北京: 国防工业出版社, 2005Liu Xisan. High pulsed power technology[M]. Beijing: National Defense Industry Press, 2005 [5] 贾志杰, 张乔根, 张斌, 等. 直流下SF6中绝缘子的闪络特性[J]. 高电压技术, 2009, 35(8):1903-1907Jia Zhijie, Zhang Qiaogen, Zhang Bin, et al. Flashover characteristic along the insulator under DC voltage in SF6 gas[J]. High Voltage Engineering, 2009, 35(8): 1903-1907 [6] 刘琳, 李晓昂, 张锐, 等. 影响GIS支柱绝缘子闪络电压的沿面电场特征参数[J]. 高电压技术, 2019, 45(9):2740-2747 doi: 10.13336/j.1003-6520.hve.20190831007Liu Lin, Li Xiaoang, Zhang Rui, et al. Characteristic parameters of electric field along the surface affecting the flashover voltage of GIS pillar insulators[J]. High Voltage Engineering, 2019, 45(9): 2740-2747 doi: 10.13336/j.1003-6520.hve.20190831007 [7] 田可新, 王钢. GIS绝缘子在冲击电压下沿面闪络的分析[J]. 高压电器, 2003(6):14-16 doi: 10.3969/j.issn.1001-1609.2003.06.006Tian Kexin, Wang Gang. Analysis of the surface flashover on GIS basin insulator under lightning impulse voltage[J]. High Voltage Apparatus, 2003(6): 14-16 doi: 10.3969/j.issn.1001-1609.2003.06.006 [8] 孙楚昱, 张国伟, 王海洋, 等. 纳秒脉冲下SF6中的沿面闪络特性[J]. 绝缘材料, 2017, 50(4):51-55Sun Chuyu, Zhang Guowei, Wang Haiyang, et al. Surface flashover characteristics in SF6 gas under nanosecond pulse voltage[J]. Insulating Materials, 2017, 50(4): 51-55 [9] 王增彬, 成永红, 陈玉, 等. 脉冲陡度对快脉冲下真空沿面闪络特性的影响[J]. 高电压技术, 2009, 34(1):151-156 doi: 10.13336/j.1003-6520.hve.2009.01.020Wang Zengbin, Cheng Yonghong, Chen Yu, et al. Influence of pulse steepness on vacuum surface flashover characteristic under steep pulse[J]. High Voltage Engineering, 2009, 34(1): 151-156 doi: 10.13336/j.1003-6520.hve.2009.01.020 [10] 张乔根. 陡波前冲击电压下SF6气体间隙及绝缘子沿面放电特性[D]. 西安: 西安交通大学, 1996Zhang Qiaogen. Discharge characteristics of SF6 gas gap and insulator along the surface under steep wave front impulse voltage[D]. Xi'an: Xi'an Jiaotong University, 1996 [11] 陈玉. 环氧复合材料快脉冲真空闪络特性研究[D]. 西安: 西安交通大学, 2008Chen Yu. Study on pulsed flashover characteristic of epoxy composites in vacuum[D]. Xi'an: Xi'an Jiaotong University, 2008 [12] 邹晓兵, 朱宏林, 曾乃工, 等. 纳秒级高压快脉冲发生器的研制[J]. 高电压技术, 2011, 37(3):787-792 doi: 10.13336/j.1003-6520.hve.2011.03.005Zou Xiaobing, Zhu Honglin, Zeng Naigong, et al. Development of a nanosecond fast pulse generator[J]. High Voltage Engineering, 2011, 37(3): 787-792 doi: 10.13336/j.1003-6520.hve.2011.03.005 [13] 冉慧娟, 王珏, 王涛, 等. 纳秒脉冲下SF6气体放电特性[J]. 高电压技术, 2012, 38(7):1690-1696Ran Huijuan, Wang Jue, Wang Tao, et al. Breakdown characteristics in compressed SF6 under nanosecond-pulses[J]. High Voltage Engineering, 2012, 38(7): 1690-1696 [14] 孙楚昱, 王海洋, 谢霖燊, 等. SF6中氧化铝环氧复合材料的纳秒脉冲闪络特性[J]. 强激光与粒子束, 2021, 33:055002 doi: 10.11884/HPLPB202133.200289Sun Chuyu, Wang Haiyang, Xie Linshen, et al. Flashover characteristics of epoxy/Al2O3 composite under nanosecond rising pulses in SF6 gas[J]. High Power Laser and Particle Beams, 2021, 33: 055002 doi: 10.11884/HPLPB202133.200289 [15] Mao Jiale, Wang Shuang, Cheng Yonghong, et al. Influence of pulse front steepness on vacuum flashover characteristics[J]. Applied Surface Science, 2018, 448: 261-269. doi: 10.1016/j.apsusc.2018.03.214 相关文章施引文献资源附件(0) 
点击查看大图
图(13) / 表(1)计量
- 文章访问数: 640
- HTML全文浏览量: 223
- PDF下载量: 89
- 被引次数: 0
