Numerical calculation of the negative onset corona voltage of high-voltage direct current bare overhead transmission conductors

The negative onset corona voltage of high-voltage direct current bare overhead transmission conductors has been studied by numerical calculations and gas discharge experiments. First, the charge simulation method, an accurate numerical method, is employed to calculate the distribution of the electrical fields in the vicinity of a bare conductor. Then, the electrical field values calculated and a criterion from the gas discharge theory are utilised to evaluate the onset voltage of the negative corona on the bare conductor. Furthermore, a formula for a high altitude correction factor is used to calculate the negative onset corona voltage of a bare conductor located at a high altitude. Finally, it is found that the calculated onset-voltage values agree satisfactorily with the data measured on laboratory models and full-scale test lines.

[1]  Jos Arrillaga,et al.  High Voltage Direct Current Transmission , 2014 .

[2]  M. Abouelsaad,et al.  Onset voltage of negative corona on stranded conductors , 2007 .

[3]  M.J. Thomas,et al.  An integro-differential equation technique for the computation of radiated EMI due to corona on HV power transmission lines , 2005, IEEE Transactions on Power Delivery.

[4]  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.

[5]  W. J. Humphreys,et al.  Physics of the Air , 1929, Nature.

[6]  M. Abdel-Salam.  Calculating the effect of high temperatures on the onset voltages of negative discharges , 1976 .

[7]  M. Abdel-Salam,et al.  Calculation of corona onset voltage for duct-type precipitators (electrostatic devices) , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[8]  Electron emission from dielectric surface due to UV irradiation under atmospheric air condition , 1988, Proceedings., Second International Conference on Properties and Applications of Dielectric Materials.

[9]  Nazar H. Malik,et al.  A review of the charge simulation method and its applications , 1989 .

[10]  M. Abdel-Salam,et al.  The onset voltage of coronas on bare and coated conductors , 1998 .

[11]  H. Singer,et al.  A Charge Simulation Method for the Calculation of High Voltage Fields , 1974 .

[12]  Assessment of corona models based on the Deutsch approximation , 1994 .

[13]  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.

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

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