Determination of Synchronous Machine Constants by Test Reactances, Resistances, and Time Constants

Wright, Sherwin H.

doi:10.1109/t-aiee.1931.5055960

Cited by 66 publications

(14 citation statements)

References 11 publications

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“…Steady-state analysis is valid because the slip is very small. It can be found [16] that the magnitude of the armature current is modulated between a maximum and a minimum value proportional to the inverse of X q and X d . respectively.…”

Section: Available Methods For Parameter Estimationmentioning

confidence: 99%

Review of synchronous generator parameters estimation and model identification

Ghomi

Sarem

2007

2007 42nd International Universities Power Engineering Conference

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In this article the review of synchronous generator parameter estimation and model identification presented. Synchronous generators play a very important role in the stability of power systems. A valid model for synchronous generators is essential for a reliable analysis of stability and dynamic performance. Almost three-quarters of a century after the first publications in this area, the subject is still a challenging and attractive research topic. There are many propositions for the determination of synchronous machine parameters. Among the modern techniques used are neural networks, finite elements, on-line and off-line statistical methods, frequency response, load rejection and others.

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Section: Available Methods For Parameter Estimationmentioning

confidence: 99%

Review of synchronous generator parameters estimation and model identification

Ghomi

Sarem

2007

2007 42nd International Universities Power Engineering Conference

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“…The asynchronous test may be regarded as an extension of the well known slip test. 4 When the slip frequency is very low, the test determines the two synchronous reactances X d and X q , which are the limiting values at zero frequency of the operational impedances.…”

Section: Asynchronous Testmentioning

confidence: 99%

Operational impedances of turbogenerators with solid rotors

Bharali

Adkins

1963

Proc. Inst. Electr. Eng. UK

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SynopsisIt has long been known that the performance of a turbogenerator differs in certain respects from that predicted by the idealised theory based on Park's equations. The reason is that the damping effects of eddy currents in the solid rotor are not correctly represented by damper coils acting on the two axes.The theory presented in the paper allows for the eddy currents in the determination of the direct-and quadrature-axis operational impedances X d (p) and X g (p). They are calculated as frequency-response functions X d (Jaj) and X q (JcS) by considering sinusoidally varying fluxes on one or the other axis in the machine at standstill. Two alternatives are considered: one when the flux reverses and the other when there are only flux changes of limited magnitude.The impedance values are used to calculate the characteristics during asynchronous operation and the current after a 3-phase short circuit. Two large machines and one model machine were tested and showed good agreement with the theory. A new method is suggested for determining the value of damping torque for use in a stability study.

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“…There are three approaches for modeling the synchronous generators [2]: white-box modeling [3,4], grey-box modeling [5][6][7] and black-box modeling [8][9][10][11][12][13]. The first method is based on off-line tests and the second and the third methods are based on on-line measurements.…”

Section: Introductionmentioning

confidence: 99%

“…The white-box modeling refers to some methods such as the traditional methods of modeling the synchronous generators [3,4]. These methods assume a known structure for the synchronous machine.…”

Section: Introductionmentioning

confidence: 99%