Dynamic thermal rating of power lines in raining conditions - model and measurements

In recent years there has been increased interest in dynamic assessment of transfer capability of transmission lines in power systems based on real-time measurements of atmospheric data. The dynamic transfer capability enables the transmission system operators to utilize existing power lines more effectively and more safely with regards to critical power line temperatures and to enforce safety measures during potentially dangerous events. A new dynamic thermal rating model for power lines, based on existing CIGRE assumptions, is presented, which is upgraded to maintain also rainy conditions that are not considered in CIGRE. The results of presented model are compared and validated with measurements from a testing site.