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3D Electromagnetic Field Analysis Applied to Evaluate the Accuracy of a Voltage Transformer under Distorted Voltage

Institute of Mechatronics and Information Systems, Lodz University of Technology, 90-924 Lodz, Poland
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Energies 2021, 14(1), 136; https://doi.org/10.3390/en14010136
Received: 29 November 2020 / Revised: 21 December 2020 / Accepted: 25 December 2020 / Published: 29 December 2020
(This article belongs to the Section Electrical Power and Energy System)
Voltage transformers (VTs) are an important element of the measuring system that allows measuring the energy flow in medium and high voltage networks. Additional problems with the accuracy of the measurement introduced by the appearance of sources and nonlinear receivers cause deformation of the voltage shape in the energy system. Due to the high metrological requirements, the design of voltage transformers requires high accuracy (for class 0.2 ΔU ≤ 0.2, phase displacement ≤10 min), which is not possible with the use of analytical methods using approximate models. Therefore, only the application of numerical modeling by the finite element method, taking into account real three-dimensional phenomena, allows achieving high modeling accuracy. The article concerns the phenomenon of the influence of voltage higher harmonics of supply voltage on the accuracy (up to the 100th harmonic) of the measuring inductive voltage transformer (IVT). The applied modeling method takes into account the phenomena in the transformer core and the circuit equations resulting from the winding arrangement, which allows for the study of the deformation voltage transformation. Experimental tests on a real model to evaluate the method used were necessary. The article presents simulations for a model transformer, and results have been confirmed by experimental tests. View Full-Text
Keywords: voltage transformers; finite element method; distorted voltage voltage transformers; finite element method; distorted voltage
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MDPI and ACS Style

Lesniewska, E.; Kaczmarek, M.; Stano, E. 3D Electromagnetic Field Analysis Applied to Evaluate the Accuracy of a Voltage Transformer under Distorted Voltage. Energies 2021, 14, 136. https://doi.org/10.3390/en14010136

AMA Style

Lesniewska E, Kaczmarek M, Stano E. 3D Electromagnetic Field Analysis Applied to Evaluate the Accuracy of a Voltage Transformer under Distorted Voltage. Energies. 2021; 14(1):136. https://doi.org/10.3390/en14010136

Chicago/Turabian Style

Lesniewska, Elzbieta, Michal Kaczmarek, and Ernest Stano. 2021. "3D Electromagnetic Field Analysis Applied to Evaluate the Accuracy of a Voltage Transformer under Distorted Voltage" Energies 14, no. 1: 136. https://doi.org/10.3390/en14010136

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