Voltage-Dependent Corona Discharge-Induced EMI: Insights into Horizontal and Vertical Polarization

Corona discharge is a well-known phenomenon in high-voltage systems, presenting both challenges and opportunities in areas such as power transmission, electromagnetic compatibility, and radio interference.This research focuses on analyzing the impact of corona discharge and surface discharges on electromagnetic interference within the frequency range of 30 MHz to 1 GHz.Through experimental measurements, the relationship between spectral maxima, applied voltage, and wave polarization was investigated.The findings indicate that as the applied AC voltage increases, the intensity of electromagnetic interference also rises, with distinct peaks identified in the EMI spectrum.Variations in EMI levels were observed between horizontally and vertically polarized waves.Furthermore, comparisons with regulatory standards revealed instances where interference levels exceeded permissible thresholds.