Negative Corona Threshold Voltage Calculation Under The Effect Of Avalanche Space Charge Fields

Abstract

The negative corona threshold voltage is calculated taking into account the effect of the space charge field of the positive ions and electrons. The positive ions are assumed to be uniformly distributed in a cone while the electrons are assumed to be uniformly distributed in a hemisphere at the head of the avalanche. A computer programs are written and used to compute the negative corona threshold voltage for SF over a wide range of the geometerical parameters and gas pressures. The results are discussed in details.