WSEAS Transactions on Power Systems
Print ISSN: 1790-5060, E-ISSN: 2224-350X
Volume 9, 2014
Short-Circuit - Analysis and Calculation
Authors: , ,
Abstract: This paper discusses about analysis and calculation of short – circuit by the program created to solve a short – circuit ratios in the power system according to Standard IEC 60909. One of the main subject is describing short-circuit current in system with currents without attenuation alternating component and short-circuit current in system with currents with attenuation alternating component. A short circuit is a part of the circuit that for some reasons has become “shorter” than it should be.[4] The current in an electrical circuit flows the easiest way and if two points in a circuit with different potentials are connected with low electrical impedance the current is taking a shortcut between the two points. The consequences of short circuit can be everything from just a minor malfunction to a disaster. The consequences are dependent of the system´s capacity for driving current in short circuit situation and how long time the short circuit current is allowed to flow. In almost every electric circuit there has to be some kind of protection against short circuit currents.[5]
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Keywords: Short-circuit impedance matrix, power system, short-circuit current, three-phase short-circuit power, positive sequence short-circuit impedance matrix, negative sequence short-circuit impedance matrix, zero sequence short-circuit impedance matrix
Pages: 291-299
WSEAS Transactions on Power Systems, ISSN / E-ISSN: 1790-5060 / 2224-350X, Volume 9, 2014, Art. #30