The damper winding influence upon salient pole synchronous generator electromotive force

Rocha, E.J.J.; Uemori, Mauro K. I.; Penteado, Aderbal de Arruda

doi:10.1109/iemdc.1997.604245

Cited by 7 publications

(7 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fig. 7 and 8 compare the damper currents of two adjacent poles (rmsvalues) of a finite-element calculation with those computed With equation (9) the mmf can be converted into a linear current density function which is then used to compute the damper bar voltages defined by equation (10) and (11). Note that the calculation must be done for each harmonic v.…”

Section: No-load Calculationmentioning

confidence: 99%

“…(13) With this surrogate linear current density function, the magnetic flux density on the rotor surface can be derived for any air-gap 6(~). Therefore this function will be used to compute the damper bar voltages as defined by equation (10) and (11). The exciting tooth ripple amplitude itself can be obtained by curves based on numerical field calculations (13).…”

Section: No-load Calculationmentioning

confidence: 99%

See 1 more Smart Citation

Calculation of power losses in the damper winding of large hydrogenerators at open-circuit and load conditions

Traxler-Samek

Lugand

Schwery

2008

2008 18th International Conference on Electrical Machines

View full text Add to dashboard Cite

This paper presents an analytical method for the calculation of currents and power losses in the damper winding of large salient-pole synchronous machines at various steadystate operational conditions. The algorithm is based on a damper winding network containing aU damper bars of a repetitive section of the machine. The self and mutual inductances as weD as the induced voltages are computed taking into account the air-gap permeance function.The presented algorithm is used to compute currents in the damper winding at open-and short-circuit test conditions. The obtained analytical results are compared with the results of transient finite element studies.

show abstract

Section: No-load Calculationmentioning

confidence: 99%

Section: No-load Calculationmentioning

confidence: 99%

Calculation of power losses in the damper winding of large hydrogenerators at open-circuit and load conditions

Traxler-Samek

Lugand

Schwery

2008

2008 18th International Conference on Electrical Machines

View full text Add to dashboard Cite

show abstract

“…Λ(ξ) can be obtained from a simplified analytical estimation [14] or a numerical field calculation [18]. Fig.…”

Section: A Air-gap Permeancementioning

confidence: 99%

“…Nica et al [13] analyze the damper-current effect in converterdriven machines. Rocha et al [14] study damper currents by using a coupled circuit. Nitta et al [15] analyze damperwinding currents due to subharmonics with finite-element (FE) method (FEM).…”

Section: Introductionmentioning

confidence: 99%

Additional Losses in the Damper Winding of Large Hydrogenerators at Open-Circuit and Load Conditions

Traxler-Samek

Lugand

Schwery³

2010

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

Large salient-pole synchronous machines are typically equipped with a damper winding. At steady-state conditions, parasitic voltages are induced in the damper bars which lead to a current flow with associated power losses. This paper describes an analytical algorithm for the calculation of currents and corresponding losses in the damper winding. The presented method is based on an equivalent network of the damper winding containing all the bars of a repetitive section of the machine. The inductances are calculated with an air-gap permeance model. Contrary to similar existing approaches, the induced damper-bar voltages are computed using a numerical integration. This allows more precise results when it comes to higher harmonics. In order to validate the analytical computation, the results are compared with the results of 2-D transient finite-element studies and with a conventional analytical method based on the d-and q-axis equivalent circuits of the machine.

show abstract

“…These functions can be represented as Fourier sums owing to their periodic nature in both space and time. From the calculated flux density, the magnitude of armature voltage harmonics and magnetic force harmonics can be estimated [1]- [4].…”

Section: Introductionmentioning

confidence: 99%

The rotating field method applied to damper loss calculation in large hydrogenerators

Ranlöf

Lundin

2010

The XIX International Conference on Electrical Machines - ICEM 2010

View full text Add to dashboard Cite

In this paper, we discuss key aspects of analytical rotating field models that can be used to estimate the damper losses in large hydrogenerators during steady load conditions. Model features of particular importance, like the saturation permeance and the structure of the damper circuit are described in greater detail. Damper currents extracted from the analytic model are found to be in good agreement with currents obtained from coupled field-circuit 2-D finite element calculations. The applicability of the model for damper current prediction during steady unbalanced load conditions is also demonstrated.

show abstract

The damper winding influence upon salient pole synchronous generator electromotive force

Cited by 7 publications

References 3 publications

Calculation of power losses in the damper winding of large hydrogenerators at open-circuit and load conditions

Calculation of power losses in the damper winding of large hydrogenerators at open-circuit and load conditions

Additional Losses in the Damper Winding of Large Hydrogenerators at Open-Circuit and Load Conditions

The rotating field method applied to damper loss calculation in large hydrogenerators

Contact Info

Product

Resources

About