Analysis of contingencies considering the new 400 kV axle administrated by Timisoara transmission branch

The paper presents the modifications made in comparison with the actual functioning pattern which is part of the subsystem in the Western and South-Western area of the Romanian power system, the Winter-Evening-Peak regime. The 400 kV electrical line Portile de Fier-Resita was introduced, the transition of the electrical lines Resita-Timisoara and Timisoara-Sacalaz-Arad from 220 kV to 400 kV was made; these lines previously operated as 220 kV lines. The 400 kV electrical lines Oradea-Nadab-Bekescsba and Arad-Nadab-Bekescsaba were also introduced to. We tried to identify a series of specific regimes which are representative for the problems raised by the reactive power flow and by the voltage level. Simple contingencies of N-1 type referring to all elements of the power system for the basic regime have been analyzed as well as double contingencies of N-2 type.