Relationship Between Corona and Radio Noise on Transmission Lines II. Conductor and Insulator Corona

The basic goal of our past studies and our future plans is to strive for a means for predicting the RI level of any proposed EHV transmission line by corona measurements of its components. Our general experimental program directed toward this end is outlined as follows: 1. Find a correlation between radio noise and pulses of known characteristics with simple corona sources. 2. Determine whether this relationship can be extended to conductors and insulators which are the primary sources of radio noise on transmission lines. 3. Determine whether this relationship can be extended to pulses which are applied to an actual line and the radio noise radiated from this line. 4. Determine the pulse generation characteristics of typical configurations and sizes of conductors. This would also include the effects of humidity, surface conditions, temperatures, aerosols, and other factors affecting pulse generation. 5. Determine the effective pulse generation of a section of a transmission line of varying lengths and the RI level derived thereof for various atmospheric conditions due to aging. The first three parts of this program have essentially been completed. The next two parts are presently being studied. It is hoped that at the completion of this program a comprehensive picture of the RI performance of transmission lines can be predicted.