Radar Detection of Ice and Rime Deposits on Cables of Overhead Power Transmission Lines1
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An impact of ice and rime deposits on the propagation of radar signals along the overhead power transmission lines is studied. The results of long-term multiyear experimental studies are discussed. The dielectric characteristics of ice and rime deposits are described. The effect of wall thickness, density and temperature of ice and rime deposits on attenuation and delay of pulse radar signals are simulated. A method for solving an inverse problem is proposed, according to which the wall thickness and density of ice and rime deposits covering the cables are determined based on the variations in radar signal attenuation and delays. The radar device readings are compared to those of the load sensor when monitoring the formation of ice and rime deposits on an active power transmission line. The developed technique helps determining the optimal regimes of timely melting ice and rime deposits on the cables of overhead power transmission lines to prevent emergency situations.
Keywordsoverhead power transmission lines cables ice and rime deposits wall thickness density radar detection method pulse signal attenuation delay
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