Finite‐element analysis combined with an ensemble Gaussian process regression to predict the damper eddy current losses in a large turbo‐generator

Zhao, Jiewen; Guo, Hai; Wang, Likun; Han, Min

doi:10.1049/iet-smt.2019.0114

Cited by 2 publications

(1 citation statement)

References 20 publications

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“…With the improvements in computer performance, the application of the time-step finite element method has increasingly widened. This method can accurately simulate the transient process of internal faults because it can account for all of the space harmonics, material non-linearities, and the influence of slotting [9][10][11][12][13]. However, problems with the rotor motion are inevitable when using the time-step finite element method.…”

Section: Introductionmentioning

confidence: 99%

Application of rotating coupling time‐step finite element method in synchronous generators’ internal faults simulation

Xiao

Liu

et al. 2021

IET Science Measure & Tech

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A precise simulation of the internal faults of synchronous generators is very important for designing the main protection scheme; therefore, it is necessary to propose an accurate model. The time-step finite element method is quite qualified for analysing problems related to the transient electromagnetic field, including the internal faults of synchronous generators. This paper presents a new time-step method, which employs a rotation coupling technique to handle rotor motion. By using this technique, the rotor remains stationary during the process of the simulation, and the motion problem becomes simple and can be conveniently implemented with a programming process. Simulation and experimental results for the internal faults of an experimental machine are compared to verify the accuracy of the rotation coupling time-step method. Moreover, a 300 MW salient pole synchronous generator is used as an example, and the transient process of this generator during internal faults is simulated. The air gap flux density, fault currents, damper windings eddy current losses, and core dynamic electromagnetic force are investigated in detail to reveal the fault characteristics more clearly and provide a basis for designing protection schemes. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Introductionmentioning

confidence: 99%