According to formula (2) from , it follows that for a linear increase in the electric field strength, the corona current increases linearly, and when [E.sub.0] is stabilized, the current decreases with time.
Hence, we can assume that there is a design of the top of the lightning detector, which will provide the corona current optimal for minimizing the formation time of the oncoming leader.
D'Alessandro  measured the relationship between the peak value of corona current and the speed of wind, and Du et al.
Figure 3 further shows the computed time variation of the corona current, which is very similar to the variation tendency of the background field assumed in our model.
The Effects of Wind on the Corona Current at the Rod Tip.
Now, the application of the mathematical model of the corona current can effectively avoid the loss of the power of the corona, radio interference, and protect the insulation performance of high voltage equipment.
The principle of mathematical model of corona current based on neural network curve fitting
The total corona current is the sum of the current directed from ionizing wires to collecting plate and the current between wires and the grid.
Corona current density distribution on the surface of plane electrode 1 experimental data are given in Fig.
where i is the value of the corona current per unit of electrode length.
At the wire cross-section diameter d = 0,6 mm, cylinder diameter D = 100 mm, wire potential U = -25 kV and corona current per unit of electrode length I = 0,5 mA/m space charge density near the wire was 170[micro]C/[m.sup.3] ([10.sup.6] single-charge ions in 1 m[m.sup.3]).
The researchers generate the corona current
-- a stream of ionized air -- by placing a high-voltage electrode near a conducting surface such as a recently painted metal panel.