500-kV Line Design: II - Corona and RIV Characteristics of Insulator-Hardware Assemblies

This paper describes the corona noise characteristics of insulator-hardware assemblies in the Boso Power Transmission Line of Tokyo Electric Power Company which is the first 500-kV transmission line in Japan. The results of corona noise measurement made on a V-string insulator assembly and a strain insulator assembly are reported. Data on the corona noise level of insulator hardware obtained from a test line were converted into noise level values for an actual transmission line for comparison with the conductor corona noise levels. The design of the insulator hardware was decided accordingly.