Analysis of electromagnetic stresses and structural integrity on the winding of a transformer under inrush currents conditions

Fonseca, Wellington da Silva; Lima, Diorge Souza; Nunes, Marcus Vinícius Alves; Soeiro, Newton Sure; Lima, Adry Kleber Ferreira de

doi:10.1109/induscon.2016.7874578

Cited by 6 publications

(2 citation statements)

References 14 publications

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“…From the experience of transformer design, even though all measurements are properly calculated, there is a possibility of defect in transformer. Some problems are created due to mechanical stress because of power conditions, when transformer is attached with the electrical network [5]. In transformer windings, these mechanical stresses are produced by transient electromagnetic forces in radial and axial directions.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Sen Transformer Using FEM and No Load Loss Calculation

Patel¹,

Chowdhury²

2020

MMEP

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The "Sen Transformer (ST)" was introduced by Dr. Kalyan Sen for controlling the power flow in transmission line. The ST provides true need of optimal power flow control that is characterized as a reliable, efficient and least expensive device. The primary of ST is connected in shunt with the transmission line, which is energized transformer core continuously. As ST is connected with the transmission line for 24 hours, a constant no load loss of energy occurs in ST. Due to an expressive loss of energy and an unfortunate influence of losses on the performance of ST, significant core loss (no load loss) is examined as a judgmental factor. Not only with pure input supply, but also with harmonics in supply and even in over excited condition, the behavior of ST should be examined. Finite Element Method (FEM) has been used over here to simulate core loss of ST and investigate behavior of flux density, magnetic field, core losses etc. with sinusoidal as well as non-sinusoidal input sources. Two different structures of ST are considered, which is used for distribution line, in proposed work and the effects of non sinusoidal voltage on no load loss have been investigated and compared for both structures using Ansys Maxwell.

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Section: Introductionmentioning

confidence: 99%

Design and Analysis of Sen Transformer Using FEM and No Load Loss Calculation

Patel¹,

Chowdhury²

2020

MMEP

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“…The axial electro-dynamic force is generated internally to the winding by the radial component of the leakage magnetic flux. It can make the coil outward expansion, even causing the winding deformation fault [1,2]. Nowadays, the major detection methods for the winding condition include the short-circuit impedance method and the frequency response analysis (FRA) method.…”

Section: Introductionmentioning

confidence: 99%

Research on a new fiber-optic axial pressure sensor of transformer winding based on fiber Bragg grating

Liu

Zhao

et al. 2017

Photonic Sens

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Based on the principle of the fiber Bragg grating, a new type of fiber-optic pressure sensor for axial force measurement of transformer winding is designed, which is designed with the structure of bending plate beam, the optimization of the packaging process, and material of the sensor. Through the calibration experiment to calibrate the sensor, the field test results of the Taikai transformer factory show that the sensitivity of the sensor is 0.133 pm/kPa and the repeatability error is 2.7% FS. The data of the fiber-optic pressure sensor in different positions maintain consistent and repeatable, which can meet the requirement of the real-time monitoring of the axial force of transformer winding.

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