Ampacity of high voltage busbar connections

The paper analyses ampacity of a busbar connection assembly between tubular aluminium busbars. These connections are made of stranded aluminium conductors bolted with clamp joints on the tubes. The assembly is installed in high voltage substations to provide a transverse connection between lines up to 4000 A. The purpose of the paper is to present coupled electromagnetic and thermal simulations, which were made according to dynamic line rating in operation. Increasing maximum permissible line current according to weather conditions affect all components in the system. The problem represents a complex task, which requires taking various weather and material parameters into consideration. The model was prepared as a real design of contemporary installed parts in substations of transmission…