Development of physical DLR calculation method

The key issues during the operation of transmission system is the integration of renewable energy sources, the increasing demand for energy and the spreading of distributed energy generation. The transmission capacity of the overhead lines should be increased to satisfy the above-mentioned questions, while the high level of operation safety is also should be provided. Dynamic Line Rating (DLR) calculation methodology offers a cost-effective way to determine the ampacity of overhead lines in real-time. This method not only increases the transmission capacity of the line, but also improves the operational safety with the forecast of thermal overloads, which means a more resilient and flexible grid against the conventional static approach. International DLR models have some neglections while the implementation of these systems for practical application is also in initial phase. The aim of this paper to investigate the practical application of DLR system with the extension and fine-tune of existing physical models. Furthermore, the advantages of the extended physical model are also demonstrated through case studies.