An Experimental Study on Corona Losses in Conductors

Abstract- In this paper, the corona inception voltage, extinction voltage and hence the corona power loss associated with bare conductors which are used for overhead energy transmission and distribution lines is experimentally studied. To simulate the corona process, a smooth surfaced corona cage is built. Test measurements were carried out to determine whether the corona losses are more dependent on conductor type or conductor diameters. Aluminum, copper and steel conductors are investigated according to conductor diameters. Test results reveal that for the same conductor type, the corona losses show linearity with conductor diameter. Keywords- Corona inception voltage, Corona extinction voltage, Corona losses