Title :
Inception voltage of corona in bipolar ionized fields-effect on corona power loss
Author :
Al-Hamouz, Zakariya M. ; Abdel-Salam, Mazen ; Al-Shehri, Abdallah Mohammad
Author_Institution :
Dept. of Electr. Eng., King Fahd Univ. of Pet. & Miner., Dhahran, Saudi Arabia
Abstract :
In this paper, an iterative finite-element-based algorithm is presented as a numerical tool for the solution of the bipolar ionized field around high-voltage DC (HVDC) transmission lines. The effect of including unequal values of the positive and negative corona inception voltages and ion mobilities on the corona power loss is investigated. In addition, the effect of negative ion field enhancement on reducing the positive conductor corona inception voltage is also studied. The present algorithm is applied to different laboratory and full-scale transmission line configurations. Comparison with previously computed V-I characteristics showed that the present computed values were in better agreement with the experiment. Also, it has been found that the effect of unequal corona inception voltages on the corona power loss (or corona current) is noticeable at applied voltages very near to the inception values
Keywords :
HVDC power transmission; corona; electric fields; finite element analysis; ion mobility; iterative methods; losses; power overhead lines; HVDC transmission lines; V-I characteristics; bipolar ionized fields; corona inception voltage; corona power loss; high-voltage DC transmission lines; ion mobilities; negative corona inception voltage; negative ion field enhancement; positive corona inception voltage; space charge modified fields; unequal corona inception voltages; Conductors; Corona; Electrostatics; Finite element methods; HVDC transmission; Poisson equations; Power transmission lines; Space charge; Spraying; Voltage;
Journal_Title :
Industry Applications, IEEE Transactions on
