| Title |
Detection Characteristics of Corona Currents in a Plane-Plane Gap Geometry with a Needle-Shaped Protrusion Subjected to Sinusoidal Voltages |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2017.31.3.069 |
| Keywords |
Corona Discharge ; RC Integrator ; Sinusoidal Voltage ; Polarity Effect ; Atmospheric Electric Field ; Corona Detection Sensitivity |
| Abstract |
This paper is focused on the improvement of corona detection sensitivity to the atmospheric electric field by applying bias voltage at a needle-shaped electrode. The experimental setup consists of the plate-to-plate configuration with a needle-shaped protrusion, the DC and high frequency sinusoidal power suppliers, and the voltage and current measuring devices. When the needle-shaped electrode is biased by the sinusoidal voltages of the power frequency and high frequency of 3kHz to 9kHz, the corona currents were observed by RC integrator. As the amplitude and frequency of the voltage applied to a needle-shaped electrode are increased, the atmospheric electric field intensity to be detected is lowered. When the sinusoidal 9kHz, 3.5kV voltage is applied to the needle-shaped electrode, the minimum detection electric filed magnitudes for the positive and negative electric fields were about 5kV/m and -10kV/m, respectively, with the integrator of 100㏀ and 0.1F. |