New concept in dynamic line rating computation

Abstract

Dynamic line rating (DLR) is a state-of-the-art technology for flexible transmission capacity allocation of overhead lines both in the main distribution and transmission systems. Based on a systematic implementation, DLR technology is not only used to uprate power lines, but also effectively can be applied against the risk posed by the extreme environmental conditions, such as thermal overload of the phase conductors or ice formation. Therefore, the practical usability of this methodology is widely researched, moreover several pilot projects had been implemented for that purpose, too. The international line rating calculation models are based on the thermal equilibrium of the phase conductors. Contrarily, a new calculation method is proposed in this article, which is based on the thermal monitoring of the phase conductors instead of the measurement of the environmental factors. The practical applicability, the advantages and limitations of the model are also discussed in this paper.