INCEPTION VOLTAGE OF CORONA IN BIPOLAR IONIZED FIELDS - EFFECT ON CORONA POWER LOSS

In this paper, an iterative finite-element based algorithm is presente d as a numerical tool for the solution of the bipolar ionized field ar ound high-voltage de (HVDC) transmission lines, The effect of includin g unequal values of the positive and negative corona inception voltage s and ion mobilities on the corona power loss is investigated, In addi tion, the effect of negative ion field enhancement on reducing the pos itive conductor corona inception voltage is also studied, The present algorithm is applied to different laboratory and full-scale transmissi on line configurations, Comparison with previously computed V-I charac teristics showed that the present computed values were in better agree ment with the experiment. Also, it has been found that the effect of u nequal corona inception voltages on the corona power loss (or corona c urrent) is noticeable at applied voltages very near to the inception v alues.