| Title |
Dynamic Line Rating Estimation Using Indirect Conductor Method in Overhead Transmission Lines |
| Authors |
Sung Duck, Kim ; Seoung-Su Lee ; Tae-In Jang ; Ji-Won Kang ; Dong-Il Lee |
| Keywords |
Dynamic Line Rating ; Weather Model ; Overhead Transmission Lines |
| Abstract |
The thermal rating of an overhead conductor, which is the maximum allowable current, is generally calculated on the basis of heat balance equation found in IEEE P738 standard. This is given as a function of the weather conditions such as air temperature, wind speed, wind direction, and sun heat. Wind speed among such weather parameters is strongly affected on determining the line rating when it appears very low level. Therefore there may occur inaccuracy since most anemometers used in line rating monitor systems may show low resolutions and stall speed performance. In this paper, we introduce a new methodology for determining the dynamic line rating in overhead transmission lines, without using any anemometer. It was shown that wind speed can be estimated by the temperatures of 2 indirect conductors, and through experimental study, the dynamic line rating obtained by the estimated wind speed was very closely that of weather model. |