Threshold inception conditions for positive DC corona in the coaxial cylindrical electrode arrangement under variable atmospheric conditions

The conditions for threshold inception of positive DC corona in the coaxial cylindrical electrode arrangement are investigated. The establishment of the self-sustained corona discharge in glow or streamer form, as influenced by conductor radius and atmospheric conditions, is evaluated through detailed computations that consider space charge field effects on avalanche growth. The salient corona characteristics at threshold inception are assessed and discussed through comparisons with literature experimental data. In a wide range of inner conductor radius and atmospheric conditions corona initiates in streamer form when a critical avalanche number per unit length of about 108 cm-1 is attained. Accurate formulation of the critical field strength required to sustain ionization allowed for the derivation of approximate expressions accounting well for the interactive effects of conductor radius and atmospheric conditions on the corona inception field strength in both glow and streamer regimes.

[1]  E. Wong,et al.  Experimental Study of dc Corona at High Temperatures and Pressures , 1958 .

[2]  E. Nasser,et al.  Mathematical‐physical model of the streamer in nonuniform fields , 1974 .

[3]  N. L. Allen,et al.  Positive corona inception in air at elevated temperatures , 2006 .

[4]  L. Loeb,et al.  Negative Coaxial Cylindrical Corona Discharges in Pure N2, O2, and Mixtures Thereof , 1951 .

[5]  Y. Gosho.  Enhancement of DC positive streamer corona in a point-plane gap in air due to addition of a small amount of an electronegative gas , 1981 .

[6]  Toshio Suzuki,et al.  Transition from the Primary Streamer to the Arc in Positive Point‐to‐Plane Corona , 1971 .

[7]  R. C. Fletcher.  Impulse Breakdown in the10−9-Sec. Range of Air at Atmospheric Pressure , 1949 .

[8]  Robert G. Olsen,et al.  Corona onset as a design optimization criterion for high voltage hardware , 2000 .

[9]  J. B. Whitehead.  The electric strength of air , 1910, Proceedings of the American Institute of Electrical Engineers.

[10]  A. Yehia.  Operating regimes of corona and silent discharges in coaxial cylindrical reactors , 2008 .

[11]  J. Kuffel,et al.  High Voltage Engineering: Fundamentals , 1984 .

[12]  R. Olsen,et al.  Application of a corona onset criterion to calculation of corona onset voltage of stranded conductors , 2004, IEEE Transactions on Dielectrics and Electrical Insulation.

[13]  Timm H. Teich.  Emission gasionisierender Strahlung aus Elektronenlawinen , 1967 .

[14]  R. Hackam,et al.  Air pollution control by electrical discharges , 2000 .

[15]  R W L Thomas,et al.  Monte Carlo simulation of electrical discharges in gases , 1969 .

[16]  I. M. Dudurych,et al.  Model of corona for an EMTP study of surge propagation along HV transmission lines , 2004 .

[17]  W. O. Schumann.  Über das Minimum der Durchbruchfeldstärke bei Kugelelektroden , 1923 .

[18]  Y Takahashi.  Thickness and luminosity distribution of positive corona sheath in air , 1982 .

[19]  M. Abdel-Salam.  Positive Wire-to-Plane Coronas as Influenced by Atmospheric Humidity , 1985, IEEE Transactions on Industry Applications.

[20]  Trinh N. Giao,et al.  Modes of Corona Discharges in Air , 1968 .

[21]  H. Raether.  Electron avalanches and breakdown in gases , 1964 .

[22]  J. Dwyer,et al.  Effects of pressure and humidity on positive corona inception from thundercloud hydrometeors , 2012 .

[23]  A comment on the methods of calculation of corona onset voltage , 1977 .

[24]  Ronald Waters,et al.  Characteristics of the stabilized glow discharge in air , 1975 .

[25]  Kejun Li,et al.  Modified peek formula for calculating positive DC Corona inception electric field under variable humidity , 2012, IEEE Transactions on Dielectrics and Electrical Insulation.

[26]  A. Kulikovsky.  POSITIVE STREAMER IN A WEAK FIELD IN AIR : A MOVING AVALANCHE-TO-STREAMER TRANSITION , 1998 .

[27]  S. Pancheshnyi,et al.  Development of a cathode-directed streamer discharge in air at different pressures: experiment and comparison with direct numerical simulation. , 2005, Physical review. E, Statistical, nonlinear, and soft matter physics.

[28]  N. L. Allen.  The effect of humidity on avalanche growth and streamer initiation , 1985 .

[29]  J. M. Meek,et al.  A Theory of Spark Discharge , 1940 .

[30]  Gildas Hartmann,et al.  Theoretical Evaluation of Peek's Law , 1984, IEEE Transactions on Industry Applications.

[31]  Y. Zebboudj,et al.  Positive corona inception in HVDC configurations under variable air density and humidity conditions , 2000 .

[32]  M. Robinson.  The Corona Threshold for Coaxial Cylinders in Air at High Pressures , 1967 .

[33]  R. P. Comsa,et al.  Influence of Gap Length on Wire - Plane Corona , 1969 .

[34]  J. B. Whitehead,et al.  The electric strength of air. — VII , 1917, Proceedings of the American Institute of Electrical Engineers.

[35]  Mark N. Horenstein,et al.  Computation of Corona Space Charge, Electric Field, and V-I Characteristic Using Equipotential Charge Shells , 1984, IEEE Transactions on Industry Applications.

[36]  A. Fridman,et al.  Non-thermal atmospheric pressure discharges , 2005 .

[37]  U. Ebert,et al.  Diffusion correction to the Raether–Meek criterion for the avalanche-to-streamer transition , 2006 .

[38]  K. Srivastava,et al.  Effect of Avalanche Space Charge Field on the Calculation of Corona Onset Voltage , 1979, IEEE Transactions on Electrical Insulation.

[39]  G. Raju,et al.  Simulation of electrical discharges in gases. Nonuniform electric fields , 1995 .

[40]  Xingliang Jiang,et al.  Influence of air pressure and humidity on positive direct current corona discharge performances of the conductor in a corona cage , 2014 .

[41]  M. Aints,et al.  Absorption of Photo-Ionizing Radiation of Corona Discharges in Air , 2008 .

[42]  I. W. McAllister,et al.  Experimental study on the onset of positive corona in atmospheric air , 1979 .

[43]  I. Inculet,et al.  The Radius of the Visible Ionization Layer for Positive and Negative Coronas , 1978, IEEE Transactions on Industry Applications.

[44]  M. Laan,et al.  The multi-avalanche nature of streamer formation in inhomogeneous fields , 1994 .

[45]  Onset voltage of positive glow corona in rod-plane gaps as influenced by temperature , 2005 .

[46]  C. Montijn,et al.  Diffusion correction to the avalanche--to--streamer transition , 2005, physics/0508109.

[47]  G. Raju,et al.  Wire-cylinder corona discharge with the wire at positive potential studies of iron oxides , 1979 .

[48]  W. A. Keen,et al.  Relationship Between Corona and Radio Influence on Transmission Lines, Laboratory Studies I-Point and Conductor Corona , 1957, Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems.

[49]  A. Mizuno,et al.  Conditions for inception of positive corona discharges in air , 2016 .

[50]  U. Ebert,et al.  Probing photo-ionization: experiments on positive streamers in pure gases and mixtures , 2009, 0912.0894.

[51]  Jinliang He,et al.  Onset conditions for positive direct current corona discharges in air under the action of photoionization , 2011 .

[52]  P. Sarma Maruvada,et al.  Corona Performance of High Voltage Transmission Lines , 2000 .

[53]  J. Macalpine,et al.  Positive corona inception voltages and corona currents for air at various pressures and humidities , 2010, IEEE Transactions on Dielectrics and Electrical Insulation.

[54]  G. A. Dawson,et al.  A model for streamer propagation , 1965 .

[55]  B R Maskell,et al.  The Effect of Humidity on a Corona Discharge in Air , 1970 .

[56]  U. Ebert,et al.  Positive streamers in air and nitrogen of varying density: experiments on similarity laws , 2008, 0805.1364.

[57]  J. Lowke,et al.  Onset corona fields and electrical breakdown criteria , 2003 .

[58]  G. W. Penney,et al.  Photoionization Measurements in Air, Oxygen, and Nitrogen , 1970 .

[59]  F. Bastien,et al.  Fine structure of streamers , 1989 .

[60]  R. Stearns.  The positive corona in air: A simplified analytic approach , 1989 .

[61]  J. Dutton,et al.  A survey of electron swarm data , 1975 .

[62]  Timm H. Teich.  Emission gasionisierender Strahlung aus Elektronenlawinen , 1967 .

[63]  Wei Wang,et al.  Study of UHV DC corona performance in a mini corona cage , 2007, 2007 Electrical Insulation Conference and Electrical Manufacturing Expo.