Model of generator saturation for use in power-system studies

Shackshaft, G.; Henser, P.B.

doi:10.1049/piee.1979.0165

Cited by 54 publications

(8 citation statements)

References 2 publications

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“…The value of Xq required to match test data is considerably lower than the standard unsaturated value obtained from manufacturers. This seems to confirm findings of several other investigators [6,7,8] and also those of the authors in deriving Xq from stator decrement tests [1,2].…”

Section: Alternate Methodssupporting

confidence: 92%

“…A magnetic circuit whose unsaturated permeance at a point aO from the pole tip is PO+P2 cos 2cx [3]. Assumed also is a net MMF with sinusoidal spacial distribution MMFx = (IF cosca -I cos(ct-e)) (7) and an assumed saturation characteristic expressing saturation component of MMF (AMMF) as function of flux density of the form P0 = 0.9 P2 = 0.2 K = 4.6 0 = 0.8 Table 1 lists results of this analysis giving the net MMF in magnitude and angle, the resulting fundamental component of flux and its angle taking saturation in effect, and the fundamental component of flux and its angle without saturation effects. Figure 3 shows the saturation characteristics for the rt1F wave at 00 (d-axis) and the saturation characteristic for the MMF wave at 900 (q-axis) for this example.…”

Section: Introductionmentioning

confidence: 99%

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Representation of Saturation in Synchronous Machines

Mello

Hannett

1986

IEEE Trans. Power Syst.

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Prediction of synchronous machine steady state and transient performance requires proper account of iron saturation effects. This paper explores, with simplifying assumptions, the physics of saliency and saturation and evaluates the capability of two alternate methods of saturation representation through comparisons of the calculations versus published test data for the Lambton generator of Ontario Hydro.Presented also are results of sensitivity to variations in parameters atnd model structures.

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Section: Alternate Methodssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Representation of Saturation in Synchronous Machines

Mello

Hannett

1986

IEEE Trans. Power Syst.

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“…Consequently, one saturation factor obtained from the open-circuit characteristic has been used for modifying the d-and q-axis inductances [1]- [4]. In this approach, the accuracy of the machine-saturated inductances is found to be poor, particularly when the salient-pole machine is considered [5].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Saturated Synchronous Generator Based on Steady-State Operating Data

Despalatović

Jadrić

Terzić

2012

IEEE Trans. on Ind. Applicat.

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This paper deals with modeling of the saturated salient-pole synchronous machines using analytical saturation model obtained based on measurements of steady-state variables. Two different saturation models are considered in order to investigate impact of the reciprocity property of the mutual inductance between d-and q-axis on transients of the saturated machine. It is shown that the simpler saturation model, which is obtained by neglecting the reciprocity property condition, may be used to model saturation in both steady-state and transient conditions. The developed model of the saturated machine is validated with measurements performed on the 34-MVA hydroturbine generator.

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“…Application of the generalized flux concept for saturation modelling in a salient pole synchronous machine is discussed in Levi (1999) and certain methods for including magnetic saturation in the d-q axes model of a synchronous machine are proposed by many researchers in Brandwajn (1980), Corzine et al (1998), DeMello and Hannett (1986), Ojo and Lipo (1989), Shackshaft and Henser (1979), and Tahan and Kamwa (1995). Harley et al (1980) evaluated the various methods of calculating and using saturation factors in the equations of a synchronous machine in order to represent saturation in both the axes.…”

Section: Introductionmentioning

confidence: 99%

A measurement technique for direct axis and quadrature axis magnetic characteristics in a projected pole (stationary field type) synchronous machine

Basha

Xavier

Jeyakumar³

2011

Transactions of the Institute of Measurement and Control

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The magnetic characteristics of a projected pole stationary field type synchronous machine are important in design and performance studies though they differ along direct axis (d-axis) and quadrature axis (q-axis). It is difficult to determine the q-axis magnetic characteristics, whereas the determination of d-axis magnetic characteristics can be done by performing an open-circuit characteristics test on the machine. In order to estimate both the d-q axes magnetic characteristics by a direct method, various flux measurement techniques such as the moving coil flux meter, ballistic galvanometer, magneto resistance flux meter, Hall effect flux meter and solid-state diode-flux meter have been analysed. A novel approach of using germanium diodes as flux sensors is proposed in this work to determine experimentally the d-q axes magnetic characteristics. The implementation of hardware, experimental investigations and the results are presented here. Furthermore, the merits and applications of the proposed method are also discussed.

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Model of generator saturation for use in power-system studies

Cited by 54 publications

References 2 publications

Representation of Saturation in Synchronous Machines

Representation of Saturation in Synchronous Machines

Modeling of Saturated Synchronous Generator Based on Steady-State Operating Data

A measurement technique for direct axis and quadrature axis magnetic characteristics in a projected pole (stationary field type) synchronous machine

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