| Title |
Characteristics of Detecting Corona Currents in a Plate-Plate Air Gap With Needle-Shaped Electrode Using RC Integrators |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2016.30.5.090 |
| Keywords |
Corona Discharge ; Passive Integrator ; DC Corona Current ; Polarity Effect ; Atmospheric Electric Field ; Detection Sensitivity |
| Abstract |
This paper presents the characteristics of sensing DC corona discharges that produced at a needle-shaped electrode placed in the homogeneous electric field which simulates the atmospheric electric field under thundercloud. The major points of interest for this purpose are the detection sensitivity and polarity effect of corona discharges. The experimental set-up consists of the plate-to-plate configuration with a needle-shaped protrusion, DC power supply, and voltage and current measuring devices. Corona current responses were observed by different RC integrators. As a result of experiments, the corona current response is related to the time constant of RC integrators. When the resistance of RC integrator is increased, and the signal of sensing corona currents is increased but the electric field intensity to be sensed is lowered. The positive sensitivity of RC integrator sensing the corona currents is different with the negative. The minimum positive and negative sensing electric field intensity were 17kV/m and -25kV/m, respectively, with the integrator. |