同轴电极的负电晕特里切尔脉冲特性分析

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摘要

利用流体动力学模型,对大气压条件下空气间隙的同轴电极结构进行了负极性电晕放电特性研究,获得了一组规则的特里切尔脉冲。除第一个脉冲外,其他脉冲的幅值均在1.5～2.5 mA。然后,对第一个脉冲(称为第一脉冲)不同发展阶段的空间电场分布和粒子密度分布进行了描述,并讨论了第一脉冲与第二脉冲之间的死区时间内不同时刻负离子密度的变化过程及其对阴极表面电场的影响作用,最后,对第二脉冲发展前后空间电场分布、电子密度分布和负离子密度分布及其变化规律进行了进一步的描述。仿真表明,随着负离子在电场力的作用下逐渐向外迁移,导线表面电场强度开始恢复,但其恢复速度在负离子远离导线的过程中逐渐变缓。同时,当导线表面电场强度恢复至低于初始拉普拉斯场强的某一特定值时,新的脉冲就开始发生,第二脉冲发生时空间电场、电子密度及负离子密度的最大值均小于第一脉冲。

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关键词 ：负电晕, 特里切尔脉冲, 空间电场分布, 粒子密度

Abstract：

In this paper, the characteristics of negative corona discharge in air at atmospheric pressure are studied by using the hydrodynamic drift-diffusion model with a coaxial electrode system, and a set of regular Trichel pulses is obtained. It is found that the pulse amplitude is between 1.5 mA and 2.5 mA except the first one. Then the distributions of the electric field, the ion densities at different stages during the first pulse are plotted. The distribution of the negative ion density and its influence on the conductor surface electric field are discussed during the dead time between the first pulse and the second pulse. After that, the distributions of the electric field, the electron and negative ion densities around the second pulse are plotted. The simulation results show that the electric field at the conductor surface increases when the negative ions remove from cathode under the influence of electric field force; and the recovery velocity of electric field slows down when the negative ions move away. Besides, before the electric field at the conductor surface recovers to its original Laplacian field strength, the next new pulse begins to happen. It is also found that the maximum values of the electric field, the electron and negative ion densities are reduced during the second pulse comparing with those in the first pulse.

Key words： Negative corona Trichel pulse electric field distribution ion density

收稿日期: 2015-04-15 出版日期: 2016-07-12

PACS:

TM723

基金资助:

国家重点基础研究发展(973)计划资助项目(2011CB209402)。

通讯作者: 何俊佳男,1968年生,教授,博士生导师,研究方向为电弧电接触、高电压与绝缘技术以及脉冲功率技术。E-mail:h-junjia@vip.sina.com

作者简介: 何旺龄男,1988年生,博士研究生,研究方向为交流输电线路的电晕放电与电磁环境。E-mail:wanglinghe88@gmail.com

引用本文:

何旺龄,何俊佳,张锦,万保权. 同轴电极的负电晕特里切尔脉冲特性分析[J]. 电工技术学报, 2016, 31(11): 211-217. He Wangling He Junjia Zhang Jin Wan Baoquan. Characteristics of Negative Corona Trichel Pulses in a Coaxial Electrode System. Transactions of China Electrotechnical Society, 2016, 31(11): 211-217.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I11/211

[1] 刘振亚.特高压电网[M].北京:中国经济出版社,2006.
[2] Huang Daochun,Shu Yinbiao,Ruan Jiangjun,et al.Ultra-high-voltage transmission in China:developments,current status,and future prospects[J].Proceeding of the IEEE,2009,97(3):553-554.
[3] Maruvada P S.Corona performance of high-voltage transmission lines[M].Baldock:Research Studies Press Ltd.,2000.
[4] 刘阳,崔翔,卢铁兵,等.湿度对绞线正极性电晕电流脉冲及其无线电干扰影响的试验[J].电工技术学报,2015,30(3):79-89.
Liu Yang,Cui Xiang,Lu Tiebing,et al.Experimental investigation of humidity impact on positive corona current pulse and its radio interference of stranded conductors[J].Transactions of China Electrotechnical Society,2015,30(3):79-89.
[5] 乔骥,邹军,袁健生,等.采用有限差分求解高压直流输电线路空间离子流场的新方法[J].电工技术学报,2015,30(6):85-91.
Qiao Ji,Zou Jun,Yuan Jiansheng,et al.A new finite difference based approach for calculating ion flow field of HVDC transmission lnes[J].Transactions of China Electrotechnical Society,2015,30(6):85-91.
[6] 胡琴,吴执,舒立春,等.交流电场下水滴对导线电晕特性的影响[J].电工技术学报,2015,30(18):237-245.
Hu Qin,Wu Zhi,Shu Lichun,et al.The crona caracteristics of the cnductor atached with wter dops under AC electrical feld[J].Transactions of China Electrotechnical Society,2015,30(18):237-245.
[7] 谢莉,赵录兴,陆家榆,等.有限长高压直流输电线路无线电干扰电磁场的计算方法研究[J].电工技术学报,2016,31(1):96-102.
Xie Li,Zhao Luxing,Lu Jiayu,et al.Study on the clculation mthod for rdio interference electromagnetic field of HVDC transmission line with finite length[J].Transactions of China Electrotechnical Society,2016,31(1):96-102.
[8] 刘云鹏,朱雷,律方成,等.特高压电晕笼直流分裂导线正极性电晕起始特性分析[J].电工技术学报,2013,28(1):73-79.
Liu Yunpeng,Zhu Lei,Lü Fangcheng,et al.Analysis of the positive corona onset characteristic of the bundle conductors in the UHV corona cage[J].Transactions of China Electrotechnical Society,2013,28(1):73-79.
[9] 何旺龄,万保权,刘震寰,等.特高压交流试验线段的无线电干扰特性研究及长线路预测[J].高电压技术,2014,40(12):3953-3960.
He Wangling,Wan Baoquan,Liu Zhenhuan,et al.Radio interference characteristics of UHVAC test lines and prediction for long lines[J].High Voltage Engineering,2014,40(12):3953-3960.
[10]Lin Lie,Zhang Peng,Wang Yongqing.Analysis of instabilities in non-equilibrium plasmas[J].Chinese Physics Letters,2004,21(10):1993-1996.
[11]Trichel G W.The mechanism of the negative point to plane corona near onset[J].Physics Review,1938,54(12):1078-1084.
[12]Loeb L B.The mechanism of the trichel pulses of short time duration in air[J].Physical Review,1952,86(2):256-257.
[13]Lama W L,Gallo C F.Systematic study of the electrical characteristics of the Trichel current pulses from negative needle-to-plane coronas[J].Journal Applied Physics,1974,45(1):103-13.
[14]欧阳吉庭,张子亮,张宇,等.空气负电晕Trichel 脉冲特性的实验研究[J].高电压技术,2014,40(4):1194-1200.
Ouyang Jiting,Zhang Ziliang,Zhang Yu,et al.Experimental study on the characteristics of negative-corona Trichel pulses in air[J].High Voltage Engineering,2014,40(4):1194-1200.
[15]Sattari P,Castle G S P,Adamiak K,et al.Numerical simulation of Trichel pulses in a negative corona discharge in air[J].IEEE Transactions on Industry Applications,2011,47(4):1935-1943.
[16]Sattari P,Castle G S P,Adamiak K,et al.Trichel pulse characteristics—negative corona discharge in air[J].Journal of Physics D:Applied Physics,2011,44(15):155502-155512.
[17]Tran T N,Golosnoy I O,Lewin P L,et al.Numerical modelling of negative discharges in air with experimental validation[J].Journal of Physics D:Applied Physics,2011,44(1):015203.
[18]Yin Han,Zhang Bo,He Jinliang,et al.Modeling of Trichel pulses in the negative corona on a line-to-plane geometry[J].IEEE Transactions on Magnetics,2014,50(2):473-476.
[19]伍飞飞,廖瑞金,杨丽君,等.棒-板电极直流负电晕放电特里切尔脉冲的微观过程分析[J].物理学报,2013(11):348-357.
Wu Feifei,Liao Ruijin,Yang Lijun,et al.Analysis on micro process of DC negative Trichel pulses in a bar-plane electrode[J].Acta Physica Sinica,2013(11):348-357.
[20]廖瑞金,伍飞飞,刘康淋,等.棒-板电极直流负电晕放电脉冲过程中的电子特性研究[J].电工技术学报,2015,30(10):319-329.
Liao Ruijin,Wu Feifei,Liu Kanglin,et al.Simulation of characteristics of electrons during a pulse cycle in Bar-Plate DC negative corona discharge[J].Transactions of China Electrotechnical Society,2015,30(10): 319-329.
[21]尹晗.直流输电线路高频电晕电流与无线电干扰的转换关系[D].北京:清华大学,2014.