Conductor temperature monitoring for the fully insulated busbar prefabricated joint considering contact resistance

The fully insulated busbar system, which has been extensively used in the industry, contains a large number of joints due to its limited length, and thus it is prone overheating failure caused by poor contact. Taking uncertainty contact resistance into account, this paper presents an indirect approach monitor conductor temperature for prefabricated joint using surface temperatures. model composed radial direction calculation (RDTC) axial (ADTC) conductor. equivalent thermal defined characterize influence resistance, based on RDTC ADTC are corrected iterative method. rise test was carried out. When state normal, transient steady-state error within 4 1 K, respectively. abnormal, under rated current less than 5 with step load about 10 thoroughly analyzed. From engineering point view, proposed algorithm can effectively hotspot evaluate state.