Preliminary communication
Transient Torsional Oscillations of Turbine-Generator Electromechanical System due to Network Faults
Zlatko MALJKOVIĆ
orcid.org/0000-0002-6691-6025
; Faculty of Electrical Engineering and Computing, University of Zagreb, Croatia
Miljenko STEGIĆ
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Croatia
Ljiljana KUTEROVAC
orcid.org/0000-0001-7994-4490
; State Intellectual Property Office of the Republic of Croatia, Zagreb, Croatia
Abstract
In the paper electromechanical torsional oscillations of the turbine-generator’s shaft-line due to network faults are addressed. Basics of the problem are outlined with special emphasis on the practical part of the issue. Problems of calculation of torsional oscillations are discussed. A mathematical model of the electromechanical system, suitable for the analysis of torsional oscillations due to the power system’s symmetrical faults, is established. An implementation of the model by the “Matrixx” software package is briefly described. Capabilities and restrictions of the presented model are discussed. Results of an example of computer simulation of transient torsional torques in the shaft-line due to a three-phase fault and the subsequent fault clearing, as obtained by the model, are presented. The effects of chosen fault clearing time are analyzed and discussed.
Keywords
Electrical System; Linear Model; Mechanical System; Three-phase Fault; Turbine-generator; Transient Torsional Oscillations; Two-axis Theory
Hrčak ID:
97943
URI
Publication date:
31.8.2012.
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