Premium
Evaluating the error caused by load ignorance through simulation of short circuit in electrical power systems
Author(s) -
AlJufout Saleh A.
Publication year - 2008
Publication title -
quality and reliability engineering international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 62
eISSN - 1099-1638
pISSN - 0748-8017
DOI - 10.1002/qre.907
Subject(s) - electric power system , transient (computer programming) , electrical network , fault (geology) , short circuit , electrical load , reliability (semiconductor) , control theory (sociology) , power (physics) , computer science , engineering , electronic engineering , electrical engineering , voltage , physics , control (management) , quantum mechanics , artificial intelligence , seismology , geology , operating system
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.