Reproducing Transformers’ Frequency Response from Finite Element Method (FEM) Simulation and Parameters Optimization

Regelii Suassuna de Andrade Ferreira, Patrick Picher (), Fethi Meghnefi, Issouf Fofana, Hassan Ezzaidi, Christophe Volat and Vahid Behjat
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Regelii Suassuna de Andrade Ferreira: Research Chair on the Aging of Power Network Infrastructure (ViAHT), Department of Applied Sciences (DSA), Université du Québec à Chicoutimi (UQAC), Saguenay, QC G7H 2B1, Canada
Patrick Picher: Hydro-Québec’s Research Institute (IREQ), Varennes, QC J3X 1S1, Canada
Fethi Meghnefi: Research Chair on the Aging of Power Network Infrastructure (ViAHT), Department of Applied Sciences (DSA), Université du Québec à Chicoutimi (UQAC), Saguenay, QC G7H 2B1, Canada
Issouf Fofana: Research Chair on the Aging of Power Network Infrastructure (ViAHT), Department of Applied Sciences (DSA), Université du Québec à Chicoutimi (UQAC), Saguenay, QC G7H 2B1, Canada
Hassan Ezzaidi: Research Chair on the Aging of Power Network Infrastructure (ViAHT), Department of Applied Sciences (DSA), Université du Québec à Chicoutimi (UQAC), Saguenay, QC G7H 2B1, Canada
Christophe Volat: Research Chair on the Aging of Power Network Infrastructure (ViAHT), Department of Applied Sciences (DSA), Université du Québec à Chicoutimi (UQAC), Saguenay, QC G7H 2B1, Canada
Vahid Behjat: Research Chair on the Aging of Power Network Infrastructure (ViAHT), Department of Applied Sciences (DSA), Université du Québec à Chicoutimi (UQAC), Saguenay, QC G7H 2B1, Canada

Energies, 2023, vol. 16, issue 11, 1-14

Abstract: Frequency response analysis (FRA) is being employed worldwide as one of the main methods for the internal condition assessment of transformers due to its capability of detecting mechanical changes. Nonetheless, the objective interpretation of FRA measurements is still a challenge for the industry. This is mainly attributable to the lack of complete data from the same or similar units. A large database of FRA measurements can contribute to improving classification algorithms and lead to a more objective interpretation. Due to their destructive nature, mechanical deformations cannot be performed on real transformers to collect data from different scenarios. The use of simulation and laboratory transformer models is necessary. This research contribution is based on a new method using Finite Element Method simulation and a lumped element circuit to obtain FRA traces from a laboratory model at healthy and faulty states, along with an optimization method to improve capacitive parameters from estimated values. The results show that measured and simulated FRA traces are in good agreement. Furthermore, the faulty FRA traces were analyzed to obtain the characterization of faults based on the variation of the lumped element’s parameters. This supports the use of the proposed method in the generation of faulty frequency response traces and its further use in classifying and localizing faults in the transformer windings. The proposed approach is therefore tailored for generating a larger and unique database of FRA traces with industrial importance and academic significance.

Keywords: frequency response; transformer; condition monitoring; finite element method simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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