Time-Stepping Finite-Element Analysis of a 14-MVA Salient-Pole Shipboard Alternator for Different Damper Winding Design Solutions

Tessarolo, Alberto; Bassi, Cristina; Giulivo, D.

doi:10.1109/tie.2011.2157294

Cited by 44 publications

(26 citation statements)

References 20 publications

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“…By making a three-phase short-circuit fault at terminals of the stator windings, the test is employed (as a standard procedure) to obtain the transient and subtransient parameters in a machine experiment [9]. It should be noted that the negative resistor device, usually connected in field circuits of dynamic simulation machines in series, is not considered in this paper.…”

Section: Formulation Of Fe Applicationmentioning

confidence: 99%

“…The resistances of the stator and field windings can be accurately calculated by using an analytical solution from design data and are set in the winding The 2-D field-circuit coupled time-stepping FE prototype model is used to simulate the three-phase sudden short-circuit test [6]. By making a three-phase short-circuit fault at terminals of the stator windings, the test is employed (as a standard procedure) to obtain the transient and subtransient parameters in a machine experiment [9]. It should be noted that the negative resistor device, usually connected in field circuits of dynamic simulation machines in series, is not considered in this paper.…”

Section: Formulation Of Fe Applicationmentioning

confidence: 99%

“…However, the accuracy of analytical formulas is inadequate due to the simplified assumptions and many correction factors made in the calculation procedure. The finite element (FE) method has been recently applied in various SPSM analyses [9,10], which makes the consideration of saturation and skin effects come true. By employing FE analysis, the accuracy of computation, compared with analytical solution, is significantly improved.…”

Section: Introductionmentioning

confidence: 99%

“…By employing FE analysis, the accuracy of computation, compared with analytical solution, is significantly improved. For example, the standard three-phase sudden short-circuit test is simulated in [9], and the standstill frequency response test is simulated in [10] by using a time-stepping FE analysis to obtain terminal transient parameters.…”

Section: Introductionmentioning

confidence: 99%

“…In the traditional method given in [11] and applied in [9], transient parameters are obtained from short-circuit current waveform by wave analysis. This method is relatively subjective, and only suitable for terminal parameters' computation.…”

Section: Introductionmentioning

confidence: 99%

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Finite Element Computation of Transient Parameters of a Salient-Pole Synchronous Machine

et al. 2017

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This paper presents a novel method for calculating the transient parameters of a saturated salient-pole synchronous machine (SPSM) with damper cage using finite element analysis. All detailed leakage inductances in a modified d-q model are discussed and separately extracted. In addition; the frozen permeability method is used in a 2-D finite element analysis to consider saturation and skin effects for determining the inductances. The terminal reactance parameters are obtained from all elements of the d-and q-axis equivalent circuits in all the chosen time constants during the transient process. The variation of leakage inductances of the SPSM in transient processes is also investigated and discussed. To determine transient time constant parameters; the Prony algorithm is applied in the presented method. A program developed to automatically solve the simulation and computation with the proposed method is described. This method is applied to a prototype and validated by experimental results. Some discussion about the relationship between rotor geometric design and the transient parameters of SPSMs is provided. The variation of leakage magnetic field of SPSMs in transient processes is also investigated. This method can be applied in transient parameter estimation and optimization of SPSMs in the design stage.

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Section: Formulation Of Fe Applicationmentioning

confidence: 99%

Section: Formulation Of Fe Applicationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Finite Element Computation of Transient Parameters of a Salient-Pole Synchronous Machine

et al. 2017

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Winding function model of Grid-Connected synchronous Turbo-Generator with damper winding

Kajević,

Ciriani,

Joksimović

2024

International Journal of Electrical Power & Energy Systems

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Damper cage loss reduction and no-load voltage THD improvements in salient-pole synchronous generators

Nuzzo¹,

Galea²,

Gerada³

et al. 2016

8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016)

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Salient-pole synchronous generators (SG) have a long history of utilization as reliable power generation systems. Important aspects of such generators include a high power-to-weight ratio, high efficiency and a low cost per kVA output [1]. Another critical aspect is the requirement for very low harmonic content in the output voltage. Hence, it is very important to be able to model and predict the no-load voltage waveform in an accurate manner in order to be able to satisfy standards requirements, such as the permissible total harmonic distortion (THD). Also, at steady-state conditions, parasitic voltages are induced in the damper bars which lead to a current flow with associated power losses and an increase in temperatures. This paper deals with an in-detail analysis of a 4 MVA SG, whose operation is studied and compared with experimental results for validation purposes. The same platform is then used to propose innovative solutions to the existing design and operational challenges of the machine aimed at reducing ohmic loss in the damper cage and improving the output voltage THD, without reverting to disruptive techniques such as rotor and/or stator skewing.

show abstract

Time-Stepping Finite-Element Analysis of a 14-MVA Salient-Pole Shipboard Alternator for Different Damper Winding Design Solutions

Cited by 44 publications

References 20 publications

Finite Element Computation of Transient Parameters of a Salient-Pole Synchronous Machine

Finite Element Computation of Transient Parameters of a Salient-Pole Synchronous Machine

Winding function model of Grid-Connected synchronous Turbo-Generator with damper winding

Damper cage loss reduction and no-load voltage THD improvements in salient-pole synchronous generators

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