Abstract#R##N##R##N#Reliability of protection and apparatus selection of the electrical power systems depend on the correct and accurate calculation of short-circuit currents. The simulation of the electrical power systems is one of the methods that is used for the determination of the short-circuit currents. In this paper, the model of the electrical power system has been represented by a system of differential equations for current determination. These differential equations have been expressed in Cartesian system of coordinates that decreased the number of the equations by one-third. This paper compares two approaches of short-circuit simulation in electrical power systems and evaluates the error in the calculated short-circuit current during both transient and steady-state conditions. These approaches are as follows: first, the replacement of the load parameters by zero and second, the introduction of fault simulation switch. A fault has been simulated in a study electrical power system and the factors on which the error depends have been determined. In this paper, the envelope of the short-circuit current has been considered as a comparative criterion. Copyright © 2008 John Wiley & Sons, Ltd.
['Saleh Al-Jufout']
Evaluating the error caused by load ignorance through simulation of short circuit in electrical power systems