Simulation of secondary arc on 400-kV transmission system consisting of overhead line section and power cable section

This paper deals with the computation of secondary arc in different 400-kV transmission systems that differ from each other in their configuration. Two technologies overhead line (OHL) and power cable are implemented worldwide to transfer energy for longs distances at extreme high voltage (EHV) level. Long EHV lines are generally compensated by shunt reactor. Their connection to the line, compensation level and localization are factors that could influence fault transients of the system. The representation of the secondary arc should be realistic to determine correctly the auto-reclosure performance. The secondary arc is modelled in the digital transients program EMTP/ATP. The dynamic behaviour of the arc is determined on the basis of energy balance in the arc column. Simulations with real transmission lines are very useful to understand the arcing phenomenon in particular when line consists of overhead line, cable section and shunt reactors.