Title :
Multiple contribution of windings and massive rotor to the subtransient behaviour of turbogenerators
Author :
Johann, Bacher ; Hansjörg, Köjler
Author_Institution :
Inst. for Electr. Machines & Drive Technol., Graz Univ. of Technol., Austria
Abstract :
Most equivalent circuit models for synchronous machines have omitted the effects of the massive rotor to the subtransient behaviour of turbogenerators. But these effects can be described by an additional damper circuit. The approach of this paper is a model with this extra damper circuit. Methods of measurements of the model parameters are discussed. Predicted transient state performance, based on the analysis of the ultimate asymmetric short circuit current, is compared with the measurement at the machine. The significant dependency of the sub-transient behaviour on this additional damper circuit is discussed. An equivalent circuit with two damper circuits causes an increase of the first positive and negative current peak in the ultimate short circuit current
Keywords :
damping; equivalent circuits; machine theory; rotors; short-circuit currents; transient analysis; turbogenerators; additional damper circuit; damper circuit; equivalent circuit models; massive rotor; measurement methods; negative current peak; positive current peak; predicted transient state performance; short circuit current; sub-transient behaviour; subtransient behaviour; turbogenerators; ultimate asymmetric short circuit current; Current measurement; Damping; Differential equations; Equivalent circuits; Rotors; Shock absorbers; Short circuit currents; Stators; Synchronous machines; Turbogenerators;
Conference_Titel :
Electrical and Computer Engineering, 2001. Canadian Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-6715-4
DOI :
10.1109/CCECE.2001.933556
