Application of Finite Difference Time Domain to Calculate the Transmission Coefficient of an Electromagnetic Wave Impinging Perpendicularly on a Dielectric Interface with Modified MUR-I ABC

Mukherjee, Biswajeet; Vishwakarma, Dinesh Kumar

doi:10.14429/dsj.62.792

Cited by 15 publications

(9 citation statements)

References 11 publications

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“…Although finite difference method (FDM) is also a good method [24,25], the FEM is more suitable for the calculation of the electromagnetic problem in the paper. Although finite difference method (FDM) is also a good method [24,25], the FEM is more suitable for the calculation of the electromagnetic problem in the paper.…”

Section: -D Calculation Of the Magnetic Fieldmentioning

confidence: 99%

Investigation on the magnetic bias current and electromagnetic force of power transformer in multi-layer soil area

Yang

Feng

Liu³

et al. 2015

International Journal of Applied Electromagnetics and Mechanics

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When HVDC transmission lines operate in the monopole ground return mode or asymmetric bipolar mode, DC current flows in the earth and DC magnetic bias will arise in neutral point grounding (NPG) transformers.In this work, the model to calculate the potential distribution for multi-layer soil structure is set up, then the magnetic bias current (MBC) is calculated. The magnetic field distribution in the NPG transformer is obtained according to MBC, and electromagnetic energy and force in the transformer are calculated. Finally, the influence on MBC, electromagnetic energy and force caused by soil parameters are investigated. Results indicate that thickness of the first layer and resistivity of the second layer have a greater contribution to MBC, electromagnetic energy and force. To avoid excessive vibration of the NPG transformer, the soil at grounding electrode with a greater thickness in the first layer and lower resistivity in the second layer is preferred.through the neutral grounding points and DC magnetic bias arises. Secondly, geomagnetic storm caused by the interaction of geomagnetic field and solar plasma wind, generates an induced current, which flows through the NPG power transformers, finally DC MBC will come up [6-9].Many researchers have been concentrated on the studies of DC magnetic bias, and great achievements have been obtained. In [10], DC bias experiments on power transformers are conducted. The experimental results show that the vibration and audible noise of the transformer will change under the DC magnetic bias current. Siti et al. also conducted some experiments to investigate the effect of DC magnetic bias in power transformer, the results show that harmonic arises with the DC current, and the even harmonics are significant in DC magnetic bias rather than in normal AC supply [11]. Baguley et al. measured the core loss, and the results show that there is a strong correlation between core loss and the magnetostrictive vibration caused by the DC magnetic bias [1]. Hasan et al. researched the magnetizing current waveforms of single phase power transformer under DC bias by simulation and experiment, and results show that the waveforms will distort when the DC bias exist [12]. In [13], the influence of transformer DC magnetic bias was analyzed using the equivalent coupled electric circuit and magnetic circuit method, which was verified by tests. In [14], Li et al. used Wavelet Packet Transform (WPT) to analyze the vibration signals which were obtained by experiment, and the energy eigenvectors were obtained. Results show that the energy eigenvector of vibration can reflect DC magnetic bias level in the transformer, hence it can be used as the criterion to determine the relationship between vibration levels and influence degree of DC magnetic bias to power transformers. In [3,6,15], the mechanism and influence of DC magnetic bias were analyzed, then some suppression measures were introduced, for example, using resistors or capacitors in transformer grounding wire; connecting compensation device;...

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Section: -D Calculation Of the Magnetic Fieldmentioning

confidence: 99%

Investigation on the magnetic bias current and electromagnetic force of power transformer in multi-layer soil area

Yang

Feng

Liu³

et al. 2015

International Journal of Applied Electromagnetics and Mechanics

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“…The remaining boundaries are terminated with a 4-cell perfect matched layer (PML) to approximate the free space. Although, other terminating techniques can be utilized, such as MUR-I for dielectric materials [11,12], PML is advantageous for domains involving lumped elements in free-space. The domain is divided in 60×52×37 cubic cells of 8 cm edge dimensions, while the time-step is set to Δt = 177.4 ps, a setup that is maintained throughout our analysis.…”

Section: Touch Voltage Analysismentioning

confidence: 99%

A Circuit Human Body Model for an Indirect Lightning Strike Analysed by means of an FDTD Method

Alrim

Amanatiadis

Lalas

et al. 2014

9th IET International Conference on Computation in Electromagnetics (CEM 2014)

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In the present paper, a simplified lumped element human body, stroked by a lightning touch volage, is designed and analyzed using the finitedifference time-domain (FDTD) method. The extracted results are compared with an electronic circuit simultor validating our numerical method. Moreover, other touch voltage scenarios are investigated, measuring and comparing the current that flows through different body parts. Additionally, the induced current to a human body, being in the vicinity of a lightning stroked object, is accurately calculated through the FDTD algorithm. The inability of the circuit modeler to simulate non-contact configurations proves the necessity of our numerical algorithm, while the possibility of the electric discharge effect is introduced.

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“…Finite-difference time-domain (FDTD) algorithm is a commonly used numerical method for analyzing antennas, designing microelectronic devices, performing electromagnetic compatibility analysis, and resolving other electromagnetic field problems [1][2][3][4][5][6]. The FDTD method belongs to a type of stencil computation, which updates the electric and magnetic field components of each Yee cell in the time domain following a regular calculation pattern.…”

Section: Introductionmentioning

confidence: 99%

Parallel Hardware Architecture of the 3d FDTD Algorithm With Convolutional Perfectly Matched Layer Boundary Condition

Kong¹,

Su²

2020

PIER C

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The finite-difference time-domain (FDTD) algorithm is a numerical stencil computation method, which is widely used in solving electromagnetic simulation problems. However, this algorithm is both computing and storage intensive, so the simulation efficiency is usually restricted in software implementation on CPUs. Recently, hardware accelerators have proved to be effective in improving the performance of various stencil computations. In this paper, we propose a hardware architecture of the 3D FDTD algorithm along with a practical convolutional perfectly matched layer (CPML) boundary condition and implement it on a field programmable gate array (FPGA). By applying the chain processing elements array and temporal parallel strategy, the proposed accelerator can achieve a maximum of 608 mega cells per second (Mcells/s), which is approximately 6 times higher than that of other reported designs on FPGAs. Moreover, the accelerator can maintain the speed above 467 Mcells/s for different grid sizes and CPML layers without modifying the hardware design, which demonstrates the performance stability and flexibility of the architecture under various applications.

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Application of Finite Difference Time Domain to Calculate the Transmission Coefficient of an Electromagnetic Wave Impinging Perpendicularly on a Dielectric Interface with Modified MUR-I ABC

Cited by 15 publications

References 11 publications

Investigation on the magnetic bias current and electromagnetic force of power transformer in multi-layer soil area

Investigation on the magnetic bias current and electromagnetic force of power transformer in multi-layer soil area

A Circuit Human Body Model for an Indirect Lightning Strike Analysed by means of an FDTD Method

Parallel Hardware Architecture of the 3d FDTD Algorithm With Convolutional Perfectly Matched Layer Boundary Condition

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