Influence of Surface Contamination of Conductor on Ultraviolet Characteristics of Negative DC Corona Discharge

Surface contamination of high voltage DC power transmission lines could greatly influence the corona characteristic of conductor. Little is known about the effect of the surface condition of conductor on corona-generated UV characteristics. This paper presented the measurement of UV characteristics of negative DC corona discharge in pollution condition in a laboratory corona cage. To understand the relationship between UV characteristics and surface contamination of conductor, we researched the influence of deposition, relative dielectric constant and particle size of the contaminations on corona-generated UV characteristics. The relationships among these factors were consequently acquired. The pollution characteristics of the conductor were examined with a pollution experiment, which…