Research on Section and Split Way of Conductors for UHVAC Transmission Project

In order to control the corona loss and the interference to the environment from the UHVAC transmission line,to reduce the investment of the line,and to get the rational split way and conductor section,in the paper,the conductor surface potential gradient,conductor critical corona inception voltage,corona loss,radio interference and audible coronal noise of 1000kV AC transmission line under different phase split way and different diameter of conductor section are analyzed.The influence of high altitude on conductor critical corona inception voltage,corona loss,radio interference and audible corona noise is studied,and the adjustability of all the conductor schemes to different altitude is compared.Conductor section and phase split way with good electric performance and mechanical performance that fits UHVAC transmission of electricity in China,are put forward based on power engineering.The conclusion benefits to economical run and investment of 1000kV AC power engineering.