Modeling and Calculation of Switching Overvoltages in 400 kV Electrical Networks

Results of investigation of switching and temporary overvoltages onto 400 kV electrical networks before and after reconnection of electric network of the South-East Europe with other part of European electric network in UCTE zone are presented. Investigations are performed at 400 kV overhead lines Banja Luka-Tuzla and Mostar-Konjsko (Croatia), using EMTP-ATP. Validation of simulating model are performed at 220 kV electrical network, transmission line thermo power plant Kakanj-Switchyard Kakanj, where switching overvoltages were measured