Study of the Backflashover Phenomena in Overhead Transmission Lines using the EMTP

Direct and back-flashovers across line insulators are the main cause of transmission line outages, even when shield wires are used. So, the simulation of this phenomenon can be useful to the insulation design as well as to study the effectiveness of corrective actions. The electromagnetic transients program (EMTP) is one of the most important tools in the simulation of electromagnetic transients, with a large library of electric and electro mechanic component models. Also, user defined models can be integrated with the main program. In this work, the integration of user defined models with the EMTP, as well as its application in lightning studies, are shown