Calculation Methods of Electromagnetic Fields Very Close to Lightning

Yang, Chengxu; Zhou, Bihua

doi:10.1109/temc.2004.823626

Cited by 111 publications

(43 citation statements)

References 13 publications

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“…Recently, the application of more sophisticated numerical techniques widely employed in fullMaxwell electromagnetic field analysis (like FDTD and MoM) has been investigated [Yang and Zhou, 2004;Shoory et al, 2005;Baba and Rakov, 2006].…”

Section: Introductionmentioning

confidence: 99%

Lightning return stroke current radiation in presence of a conducting ground: 1. Theory and numerical evaluation of the electromagnetic fields

2008

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[1] The general theory describing the electromagnetic field radiated by a lightning stroke over a conducting ground is presented in this paper. The derivation of the Green functions necessary to solve the problem is discussed in detail, and the determination of the expressions for the electromagnetic field components is carried out in a form that minimizes the final computational costs. A method for the numerical evaluation of the electromagnetic field is then proposed, and it is shown that it can be used starting from any ''engineering model'' representation for the lightning current distribution along the channel. Such method is based on a new efficient evaluation of the so-called Sommerfeld's integrals appearing in the electromagnetic field expressions, without resorting to any kind of approximated formulas for them. The numerical treatment of the Sommerfeld's integrals is characterized by a proper subdivision of the integration domain, the use of the Romberg technique and the determination of a suitable upper bound for the error due to the integral truncation. In the second part of this work it will be shown how the results provided by the developed theory can be used in order to assess the validity of the most common simplified approach for the calculation of the lightning radiation over a lossy ground plane.

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Section: Introductionmentioning

confidence: 99%

Lightning return stroke current radiation in presence of a conducting ground: 1. Theory and numerical evaluation of the electromagnetic fields

2008

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“…In the FDTD method, the plane is girded by four boundary conditions, i.e., lightning channel, ground surface and two other boundary conditions before further divided into more small areas so for evaluation of electric and magnetic fields at observation point. This is explained in Figure 23 [2]. In this case, the information should be transferred layer by layer from boundary conditions to the observations point.…”

Section: Electric and Magnetic Fields Due To Lightningmentioning

confidence: 99%

“…Geometry of FDTD method for evaluation of electric and magnetic fields at observation point [2]. data due to the fact that they are based on equations that solved by FDTD method, which has some errors.…”

Section: Electric and Magnetic Fields Due To Lightningmentioning

confidence: 99%

“…2. The FDTD method has only been validated for close distances from lightning channel [2] but this proposed method covered the intermediate distances from lightning channel. This is due to the magnetic flux density which is estimated based on dipole method and the fact that this method is validated for intermediate distances from lightning channel.…”

Section: Electric and Magnetic Fields Due To Lightningmentioning

confidence: 99%

“…In this study, electric and magnetic fields are evaluated and validated by experimental results at intermediate distances (in the range from about 500 m to 10 km) from the lightning channel. Previous FDTD methods in the time domain are mostly applied for close distance from lightning channel [2].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Analytical Second-FDTD Method for Evaluation of Electric and Magnetic Fields at Intermediate Distances From Lightning Channel

Izadi¹,

Kadir²,

Gomes³

et al. 2010

PIER

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Abstract-Evaluation of electric and magnetic fields due to lightning discharge is important in determination of lightning induced voltage and power system protection especially to the distribution system. In this paper, by using dipole method, Maxwell equations and second order finite-difference time domain (later referred as a 2nd FDTD method) on two realistic return stroke currents, an algorithm for evaluation of electric fields is proposed, which is based on numerical methods in the time domain. Besides proving greater accuracy, it also allows the evaluation of electric and magnetic fields away from lightning channel. In addition, the comparison between simulation results and measured fields' wave shape showed that the proposed algorithm is in good agreement for evaluation of electric and magnetic fields due to lightning channel.

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The Finite‐Difference Time Domain Method for Solving Maxwell's Equations

Baba

Rakov

2016

Electromagnetic Computation Methods for Lightning Surge Protection Studies

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Calculation Methods of Electromagnetic Fields Very Close to Lightning

Cited by 111 publications

References 13 publications

Lightning return stroke current radiation in presence of a conducting ground: 1. Theory and numerical evaluation of the electromagnetic fields

Lightning return stroke current radiation in presence of a conducting ground: 1. Theory and numerical evaluation of the electromagnetic fields

An Analytical Second-FDTD Method for Evaluation of Electric and Magnetic Fields at Intermediate Distances From Lightning Channel

The Finite‐Difference Time Domain Method for Solving Maxwell's Equations

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