Measurements and modelling of the HF radio noise environment near an HVDC converter station
Abstract
Measurements of the HF radio noise environment near an HVDC transmission line and converter station were made outside Winnipeg in July 1977. Typical levels and characteristics are presented for various combinations of mercury arc valve noise, AC hum and DC corona from a number of sites within eight kilometers of the converter station. In addition, two sets of measurements were taken 80 km from the converter station. Values of the rootmeansquare, average and quasipeak voltages were calculated from the Amplitude Probability Distribution (APDs) of the noise and were found to compare favorably with the directly measured values. Four mathematical models, the Rayleigh and three others which were developed for atmospheric noise were fitted to the measured APD data. Using inputs of v sub rms and V sub d the LogNormal model produced the most accurate predictions of the measured APDs. The LogNormal and the Hall models both fitted the measured Average Crossing Rate data equally well.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 March 1983
 Bibcode:
 1983STIN...8333013L
 Keywords:

 Alternating Current;
 Direct Current;
 Electromagnetic Noise;
 Mercury Arcs;
 Transmission Lines;
 Amplitude Distribution Analysis;
 Mathematical Models;
 RootMeanSquare Errors;
 Communications and Radar