水膜对球-球及棒-棒电极短空气间隙工频放电特性的影响

doi:10.3969/j.issn.1008-0198.2023.06.004

湖南电力 ›› 2023, Vol. 43 ›› Issue (6): 15-22.doi: 10.3969/j.issn.1008-0198.2023.06.004

水膜对球-球及棒-棒电极短空气间隙工频放电特性的影响

邓捷¹, 陈宝辉², 方针², 邹佳斌¹, 徐凯¹

1.长沙理工大学,湖南长沙 410114;
2.国网湖南省电力有限公司防灾减灾中心(电网防灾减灾全国重点实验室),湖南长沙 410129

收稿日期:2023-09-04 修回日期:2023-10-23 出版日期:2023-12-25 发布日期:2024-01-07
通信作者: 陈宝辉(1987),男,博士,高级工程师,研究方向为高电压火灾带电防治、电网防冰、防火先进材料。
作者简介:邓捷(1993),男,博士研究生,研究方向为高电压火灾带电防治。
基金资助:
国家电网有限公司科技项目(5200-202123358A-0-0-00);湖南省重点研发计划(2021SK2049)

Influence of Water Film on Power Frequency Discharge Characteristics of Short Air Gap for Sphere-Sphere and Rod-Rod Electrodes

DENG Jie¹, CHEN Baohui², FANG Zhen², ZOU Jiabin¹, XU Kai¹

1. Changsha University of Science & Technology, Changsha 410114,China;
2. Hunan Electric Power Corporation Disaster Prevention and Reduction Center (State Key Laboratory of Disaster Prevention & Reduction for Power Grid),Changsha 410129,China

Received:2023-09-04 Revised:2023-10-23 Online:2023-12-25 Published:2024-01-07

摘要/Abstract

摘要： 以球-球和棒-棒短空气间隙为研究对象,研究了球-球、棒-棒电极覆水膜,以及不同电导率的水膜对短空气间隙工频击穿电压的影响。研究表明,在球-球短间隙下,双端电极覆水膜的击穿电压比干燥电极的击穿电压更高;但随着间隙的增大,击穿电压的增幅减少,当间隙由1 cm增长至6 cm时,击穿电压的增幅由27.32%下降至4.44%;击穿电压的增大是因为水膜的存在导致二次电子崩的起始光电子所需能量升高,间隙增大导致电离区域增大,并由此造成击穿电压的增幅随间隙的增大而下降。在棒-棒短间隙下,水膜对间隙击穿电压没有影响。水膜对球-球与棒-棒间隙放电的影响机理不同,原因在于球-球间隙为负流注,二次电子崩的起始光电子来源于阴极的光电离;而棒-棒间隙为正流注,二次电子崩的起始光电子来源于空气分子的光电离,且棒-棒间隙较大,电场畸变率较小;水的电导率对短空气间隙击穿电压没有明显影响。

关键词: 水膜, 球-球, 棒-棒, 工频, 放电特性, 击穿电压

Abstract: The short sphere-sphere and rod-rod gap are taken as the research models, and the effects of water films with different water conductivity and types of electrodes on the breakdown voltage of air gap are investigated. Research has shown that,the breakdown voltage of the both electrodes coated by water film is higher than that of the dry electrodes at the sphere-sphere short air gap,however when the gap length increases from 1 cm to 6 cm, the amplification of breakdown voltage decreases from 27.2% to 4.44%,the increase in breakdown voltage is due to the presence of a water film, which leads to an increase in the energy required for the initiation of secondary electron avalanches and photoelectrons,the increase in gap leads to an increase in the ionization region and and as a result the increase in breakdown voltage decreases with the increase of gap length.At the short rod-rod gap, the water film has no effect on the breakdown voltage of air gap. The water film has different effects on the discharge of the short sphere-sphere and short rod-rod air gaps. It is due to the fact that, at the sphere-sphere gap, the streamer is negative,the starting photoelectrons of the secondary electron collapse originate from the photoionization of the cathode, and at the rod-rod gap the streamer is positive, the starting photoelectrons of the secondary electron collapse are derived from the photoionization of air molecules, the rod to rod gap is longer, and the electric field distortion rate is smaller,and the conductivity of water has no effect on the breakdown voltage of the air gap.

Key words: water film, sphere-sphere, rod-rod, power frequency, discharge characteristics, breakdown voltage

中图分类号:

TM852

邓捷, 陈宝辉, 方针, 邹佳斌, 徐凯. 水膜对球-球及棒-棒电极短空气间隙工频放电特性的影响[J]. 湖南电力, 2023, 43(6): 15-22.

DENG Jie, CHEN Baohui, FANG Zhen, ZOU Jiabin, XU Kai. Influence of Water Film on Power Frequency Discharge Characteristics of Short Air Gap for Sphere-Sphere and Rod-Rod Electrodes[J]. Hunan Electric Power, 2023, 43(6): 15-22.

参考文献

[1] 胡长猛,谢从珍,袁超,等.雾霾对输变电设备外绝缘特性影响机理综述[J].电力系统保护与控制,2015,43(16):147-154.
[2] 董冰冰,蒋兴良,黄俊,等.雾对棒-板空气间隙交流放电特性的影响[J]. 高电压技术,2014,40(5):1339-1344.
[3] 蒋兴良,李源军.相对湿度及雾水电导率对直流输电线路电晕特性的影响[J]. 电网技术,2014,38(3):576-582.
[4] 张耿斌,罗新,沈杨杨,等.大气条件对气隙放电电压的影响及神经网络在放电电压预测中的应用[J].高电压技术,2014,40(2):564-571.
[5] 林浩然,牛海清,张耿斌,等.高湿条件下空气间隙放电规律的试验研究[J].高压电器,2014,50(1):87-91.
[6] 刘洋.雾霾的模拟及其对棒-板空气间隙放电特性影响研究[D].重庆:重庆大学,2015:39-41.
[7] 徐新亚. 高海拔棒-板空气间隙与鸟粪闪络研究[D].武汉:华中科技大学,2015:17-21.
[8] 鲁非.微米级液滴气液两相体击穿特性研究[D]. 武汉: 华中科技大学, 2006:28-46.
[9]鲁非,叶齐政,李劲,等.球-球电极气液两相体直流击穿现象的研究[J].高压电器, 2005,41(4):268-278.
[10]EBERT U, MONTIJN C,BRIELS T M P,et al.The multiscale nature of streamers[J]. Plasma Source Science and Echnology,2006,15(2):S118-S129.
[11]严璋,朱德恒.高电压绝缘技术:第3版[M].北京:中国电力出版社,2015:43-114.
[12]胡文,李黎,刘云龙,等.纳秒脉冲激励下大气压空气弥散放电电流特性的实验研究[J].中国电机工程学报,2015,35(16):4263-4270.
[13]WATERS R T,JONES R E,ALLIBONE T E. The impulse breakdown voltage and timelag characteristics of long gaps in air Ⅱ. The negative discharge[J].Philosiphical Tran Saitions of thr Royal Society of London Series A:Mathematical and Physical Sciences, 1964, 256(1069): 213-234.
[14]EL-BAHY M M,ABOU EL-ATA M A. Onset voltage of negative corona on dielectric-coated electrodes in air[J]. Journal of Physics D: Applied Physics, 2005, 38(18): 3403-3411.
[15]NOVAKD J P, BARTNIKAS R.Effect of dielectric surfaces on the nature of partial discharges[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2000, 7(1): 146-151.
[16]ABDEL-SALAM M,TURKY A,HASHEM A A,et al. The onset voltage of coronas on bare and coated conductors[J].Journal of Physics D: Applied Physics, 2000, 31(19):2550-2556.
[17]SAEKI M, GOSHO Y. Electron emission from dielectric surface due to UV irradiation under atmospheric air condition[C]//Proceedings Second International Conference on Properties and Applications of Dielectric Matenals.Beijing,China,IEEE,2002:172-173.
[18]GALLO C F, LAMA W L. Classical electrostatic description of the work function and ionization energy of insulators[J]. IEEE on Industry Applications, 1976,IA-12(1): 7-11.
[19]GRIGOR′EV A I, SHIRY′AEVA S O. The mechanism of corona discharge from a water droplet[J].Journal of Engineering Physics, 1991, 60(4): 481-488.
[20]卞星明,惠建峰,黄海鲲,等.气压湿度对负直流电晕特性影响的研究[J].中国电机工程学报,2010,30(4):118-124.
[21]LUQUE A, RATUSHNAYA V, EBERT U. Positive and negative streamers in ambient air: modeling evolution and velocities[J]. Journal of Engineering Physics D: Applied Physics, 2008, 41(23): 234005.
[22]黄道春,李晓彬,徐涛,等.蒸汽雾中悬式绝缘子表面污层饱和附水量研究[J].高电压技术,2014,40(11):3349-3356.
[23]BOUSSATON M P, COQUILLAT S,CHAUZY S,et al.Influence of water conductivity on micro-discharges from raindrops in strong electric Fields[J].Atmospheric Research,2005,76(1-4):330-345.
[24]BLENNOW H J M, SJOBERG M L A, LEIJON M A S,et al. Electric field reduction due to charge accumulation in a dielectric-covered electrode system[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2000, 7(3): 340-345.
[25]ABDEL-SALAM M, STANEK E K. On the calculation of breakdown voltages for uniform electric fields in compressed air and SF₆ [C]//1986 Annual Meeting Znolustry Applications Society. Denver, CO,USA,IEEE,2023:1216-1222.
[26]NAIDIS G V. Conditions for inception of positive corona discharges in air[J]. Journal of Physics D: Applied Physics, 2005, 38(13):2211-2214.
[27]蒋兴良,林锐,胡琴,等.直流正极性下绞线电晕起始特性及影响因素分析[J].中国电机工程学报,2009,29(34):108-114.

水膜对球-球及棒-棒电极短空气间隙工频放电特性的影响

Influence of Water Film on Power Frequency Discharge Characteristics of Short Air Gap for Sphere-Sphere and Rod-Rod Electrodes

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