Damper Currents Simulation of Large Hydro-Generator Using the Combination of FEM and Coupled Circuits Models

Gbegbe, Anicette Zihewo; Rouached, Bouali; Cros, J.; Bergeron, Maxim; Viarouge, P.

doi:10.1109/tec.2017.2719120

Cited by 19 publications

(9 citation statements)

References 27 publications

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“…As in [14], it is possible to consider magnetic saturation with the precomputed inductance functions by using a correction coefficient afterward on computed magnetic flux linkages. Performances and computing time differ depending on type of machine and chosen quantities to compute the coefficient.…”

Section: Model's Equationsmentioning

confidence: 99%

“…[φ] = φ as φ bs φ cs φ ar φ br φ cr T (14) [v in ] = v as v bs v cs v ar v br v cr T (15) [i out ] = i as i bs i cs i ar i br i cr T (16) Dynamical system of Equation ( 5) is rearranged as standard state-space form. To facilitate reading of the following equations, the θ dependency is omitted.…”

Section: Cfe-cc Model Implementation For Real-time Executionmentioning

confidence: 99%

“…For simplicity, we ignore the impact on mutual inductances. The technique used is to conduct a standstill frequency response (SSFR) test [14] and add a self-inductance to the windings in order to make the experimental response fit the simulated one. The test was conducted while rotor windings are short-circuited.…”

Section: Appendix A2 Coil Endsmentioning

confidence: 99%

“…However, it was demonstrated in [14] that, by using a magnetically coupled circuit approach using precomputed inductance functions with a FEM software, it is possible to reach relatively small computation times while keeping the accuracy of FEM. This model is called CFE-CC-Combination of Finite Element with Coupled Circuits [15].…”

Section: Introductionmentioning

confidence: 99%

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Real-Time Digital Twin of a Wound Rotor Induction Machine Based on Finite Element Method

2020

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Monitoring and early fault prediction of large electrical machines is important to maintain a sustainable and safe power system. With the ever-increasing computational power of modern processors, real-time simulation based monitoring of electrical machines is becoming a topic of interest. This work describes the development of a real-time digital twin (RTDT) of a wound rotor induction machine (WRIM) using a precomputed finite element model fed with online measurements. It computes accurate outputs in real-time of electromagnetic quantities otherwise difficult to measure such as local magnetic flux, current in bars and torque. In addition, it considers space harmonics, magnetic imbalance and fault conditions. The development process of the RTDT is described thoroughly and outputs are compared in real-time to measurements taken from the actual machine in rotation. Results show that they are accurate with harmonic content respected.

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Section: Model's Equationsmentioning

confidence: 99%

Section: Cfe-cc Model Implementation For Real-time Executionmentioning

confidence: 99%

Section: Appendix A2 Coil Endsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Real-Time Digital Twin of a Wound Rotor Induction Machine Based on Finite Element Method

2020

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“…This identification process is inherently intricate and often requires other analytical or numerical models to accurately calculate these values. Among the common methods employed for parameter identification are the Winding Functions Method (WFM) [9][10][11] and the utilization of precomputed inductance functions with the finite-element method (FEM) [12]. The WFM involves using mathematical functions to represent the magnetic field distribution within the machine, allowing for the calculation of parameters [2].…”

Section: Introductionmentioning

confidence: 99%

Experimental Identification of a Coupled-Circuit Model for the Digital Twin of a Wound-Rotor Induction Machine

Aboubi,

Maïga,

Cros

et al. 2024

Energies

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The development of monitoring and diagnostic methods for electrical machines requires the use of transient models capable of operating in real time and producing signal signatures with high precision. In this context, coupled-circuit models offer numerous advantages due to their speed of execution and accuracy. They have been successfully employed to create real-time digital twins of electrical machines. The main challenge of this modeling method lies in the preparation of the model, which involves numerous preliminary calculations and takes time to identify all its parameters. This is particularly due to the variation in inductances based on the rotor position. To determine these inductance values with great precision, the classical approach involves using finite-element field calculation software. However, the computation time quickly becomes an issue due to the large number of values to calculate and simulations to perform. This article introduces an innovative experimental approach to identify a coupled-circuit model and develop a digital twin of a wound-rotor induction machine. This method relies solely on simple electrical measurements and tests conducted at extremely low rotation speeds (1 rpm) to obtain inductance variations as a function of the rotor position. By employing this technique, the need for analytical models or finite-element field calculation simulations, which typically require precise knowledge of the machine’s geometry and materials, is circumvented. The measurement processing employs optimization methods to extract the inductances as a function of the rotor position, which are then used as input data for the coupled-circuit model. The final parameters are specific to each machine and replicate all its manufacturing imperfections such as eccentricity and geometric or winding defects. This experimental identification method significantly enhances the model’s accuracy and reduces the usually required preliminary calculation time in a finite-element-based identification process.

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Research on Global Thermal Exchange of Large Synchronous Condenser Based on the PTDI Method

Song,

Wang

2024

J. Electr. Eng. Technol.

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Damper Currents Simulation of Large Hydro-Generator Using the Combination of FEM and Coupled Circuits Models

Cited by 19 publications

References 27 publications

Real-Time Digital Twin of a Wound Rotor Induction Machine Based on Finite Element Method

Real-Time Digital Twin of a Wound Rotor Induction Machine Based on Finite Element Method

Experimental Identification of a Coupled-Circuit Model for the Digital Twin of a Wound-Rotor Induction Machine

Research on Global Thermal Exchange of Large Synchronous Condenser Based on the PTDI Method

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