Progress Report on BPA HV DC Test Line Radio Noise and Corona Loss

Power transmission of high-voltage direct current (HV dc) by overhead lines presents a new concept with which the industry has had little experience. Radio noise and corona loss values were recorded on a full-scale test line and statistically analyzed in relation to prevailing weather conditions. Comparison was made to radio noise readings taken on a nearby ac line. Results cover the analysis of approximately six months' data.