SIMULATION OF SHORT-CIRCUIT NETWORK FAULTS BY MEANS OF PERSONAL COMPUTERS.

The model enables the simulation of the two-phase fault clear of earth and two-phase to earth fault. The basis for the simulation of all kinds of short-circuits is calculation through the symmetrical components method, therefore, in principle the calculation may be restricted to one phase as with the symmetrical loading. The method contains algorithms for reducing the impedance on the unity voltage, procedure for the calculation of the relative network elements impedance values, system for network configuration specification, algorithms for bus voltages and short-circuit currents calculation iteration procedure. The stimulation procedure of all kinds of short-circiuts use on principle the same model since the transfiguration procedures are equal. Interactive work with a computer leads to exact results of the fault currents in the network branches, of the total short-circuit current flowing down to the faulted bus of the network impedances reduced on the faulted bus and of the bus voltages.