| Title |
A Comparison of DLR Calculation Methods Based on IEEE 738 and CIGRE TB 601, Focusing on Convective Heat Loss Modeling |
| Authors |
Jin-Soo Park ; Eun-Gyu GU ; SoonHo Choi ; Yoon-Sung Cho |
| DOI |
https://doi.org/10.5207/JIEIE.2026.40.3.196 |
| Keywords |
Ampacity; CIGRE TB 601; Convective heat loss; Dynamic line rating; IEEE 738 |
| Abstract |
In this paper, two international dynamic line rating (DLR) standards, IEEE 738 and CIGRE TB 601, are compared to improve the utilization of transmission capacity in response to increasing renewable energy curtailment. The study focuses on their differences in modeling convective heat loss. Using 24-hour meteorological data from South Korea’s southwestern coastal region, both methods were applied to a representative conductor model. The results showed a maximum ampacity difference of 158.6 A between the two models. For a 154kV line, this translated to a difference of up to 42.3MW (14.9%) in the three-phase active power transfer capacity. These findings suggest that the choice of DLR algorithm can significantly affect transmission capacity assessment, and that CIGRE TB 601 may provide a more suitable basis for secure grid operation under complex weather conditions. |