Sensitivity of The Electrical and UV Imaging Methods for Corona Detection Under HVDC Application

The corona phenomenon is one of the key elements that should be considered when designing High Voltage transmission lines. This phenomenon is known to compromise the efficiency of the transmission lines and may cause electromagnetic interference (EMI) in telecommunication lines. This paper presents a comparable analysis of the sensitivity response of the electrical method and the ultraviolet (UV) imaging method to detect corona discharges under HVDC application. This comparable analysis was done by measuring the corona inception voltage for positive and negative DC voltage in a high voltage laboratory using a corona cage. The results show that the electrical method is more sensitive as compared to the UV imaging method.