Calculation of leakage inductances of a salient-pole synchronous machine using finite elements

Shima, Kazuo; Ide, Kazumasa; Takahashi, Miyoshi; Yoshinari, Yoshitaka; Nitobe, Mitsuhiro

doi:10.1109/60.815041

Cited by 27 publications

(20 citation statements)

References 8 publications

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“…A damper cage with inter-pole connections is modeled by the multi-loop method in [15] as a multi-loop model having Nd and Nq windings along the d-and q-axes, respectively. However, this method is too complex to obtain the integral characteristics of the damper cage in practical applications.…”

Section: Damper Cage Modelmentioning

confidence: 99%

“…This phenomenon should also be considered in the computational analysis of leakage inductance and finally in the determination of transient parameters. FE computation of leakage inductances has been previously reported and discussed in [14][15][16][17][18][19]. For time constant determination, a curve fitting technique might be helpful when applied to calculate the time constants [12,20].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the frozen permeability method was applied in [14] to consider the core saturation and skin effect of the solid conductor bar. A detailed SPSM leakage inductance model has been generated that considers the leakage flux distribution flowing across the air gap [15][16][17]. In the literature [16,17], the influence of various operational statuses on leakage inductance variation is discussed, and the leakage inductances are obtained at the steady state FE simulation.…”

Section: Introductionmentioning

confidence: 99%

“…All elements of equivalent circuit parameters can be separately extracted by this method. In particular, the gap leakage inductances [15] are considered and obtained. The inductance variation, influenced by saturation variation during the whole transient process, are investigated and considered in the determination of transient parameters.…”

Section: Introductionmentioning

confidence: 99%

“…A lot of related work has been previously reported in the literature [13][14][15][16][17]. Magnetic vector potential (MVP) methods have been used to calculate the inductance parameters [13].…”

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: Damper Cage Modelmentioning

confidence: 99%

Section: Introductionmentioning

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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Analysis of magnetic saturation in a salient‐pole synchronous machine after sudden three‐phase short circuit

Shima

Ide

Takahashi

2003

Electrical Engineering Japan

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SUMMARYIn order to evaluate magnetic saturation under subtransient and transient states of a large-sized salient-pole synchronous machine, the currents and leakage inductances after sudden three-phase short circuits are analyzed by a two-dimensional nonlinear transient finite element method (FEM). The currents are calculated both by direct and indirect methods. The direct method uses the FEM and considers fluctuation of the magnetic saturation after the short circuit. The indirect method solves Park's differential equations without fluctuation. Results of the direct method agree well with measurements. When the preshort voltage is large, fluctuation of the leakage inductances after the short is large and it greatly affects values of the short-circuit currents. As the preshort voltage becomes large, the damper leakage inductances saturate at first, then the field leakage inductances, and finally the armature leakage inductances saturate. Although the indirect method considers saturation under the preshort condition, it gives inaccurate results and they are nearly the same as the results by the linear FEM. In general, it is thought that saturation of the leakage flux should be considered when subtransient conditions with large disturbance are analyzed.

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Advanced design methodology for single and dual voltage wound core power transformers based on a particular finite element model

Tsili

Kladas

Georgilakis

et al. 2006

Electric Power Systems Research

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Calculation of leakage inductances of a salient-pole synchronous machine using finite elements

Cited by 27 publications

References 8 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

Analysis of magnetic saturation in a salient‐pole synchronous machine after sudden three‐phase short circuit

Advanced design methodology for single and dual voltage wound core power transformers based on a particular finite element model

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