Experimental Oxidant Production Rates for EHV Transmission Lines and Theoretical Estimates of Ozone Concentrations Near Operating Lines

This paper presents wind-tunnel measurements of ozone and NOx production rates for single and bundle transmission line conductors in dry and wet corona. Ozone production rates reported in the literature for transmission line and fine wire corona, together with the authors´ results are summarized as a function of the maximum surface gradient factor. Numerical calculations estimating the ozone levels near actual 775-kV test transmission lines at the Apple Grove 750-kV Project are presented. It is concluded that pollutant concentrations generated by conductor corona on present EHV transmission lines are too low to be deleterious to the environment.