论文信息 - Effect of Nearby Buildings on Electromagnetic Fields from Lightning

Effect of Nearby Buildings on Electromagnetic Fields from Lightning

We present a discussion on the effect of nearby buildings on the electric and magnetic fields radiated by lightning. Electric and magnetic fields radiated from distant natural lightning have been measured simultaneously on the roof of a building (the Power Systems Laboratory of the Swiss Federal Institute of Technology, Lausanne, Switzerland) and on the ground at different distances away from it. The results suggest that the measured electric field on the roof of the 9-m tall building is enhanced by a factor of 1.7 to 1.9, whereas the electric fields on the ground experience a significant reduction due to the shadowing effect of the building. Also, it is shown that for a sensor located on the ground, close to a building, the magnetic field component perpendicular to the building can also experience a significant attenuation, presumably due to the effect of the induced currents in the building. The results are supported by numerical simulations, obtained using NEC-4, in which the building is represented using a simple wire-grid model.

Farhad Rachidi | Davide Pavanello | Marcos Rubinstein | P. Zweiacker | A. Mosaddeghi

[1] F. Rachidi,et al. Distortion of Electric and Magnetic Fields from Lightning Due to Close-By Metallic Structures , 2007, 2007 7th International Symposium on Electromagnetic Compatibility and Electromagnetic Ecology.

[2] S.H.H. Sadeghi,et al. The effects of tall buildings on the measurement of electromagnetic fields due to lightning return strokes , 2001, 2001 IEEE EMC International Symposium. Symposium Record. International Symposium on Electromagnetic Compatibility (Cat. No.01CH37161).

[3] Davide Pavanello,et al. electromagnetic radiation from lightning return strokes to tall structures , 2007 .

[4] V. Rakov,et al. Lightning: Physics and Effects , 2007 .

[5] C. Nucci,et al. On return stroke currents and remote electromagnetic fields associated with lightning strikes to tall structures: 2. Experiment and model validation , 2007 .

[6] F. Rachidi,et al. Far-field-current relationship based on the TL model for lightning return strokes to elevated strike objects , 2005, IEEE Transactions on Electromagnetic Compatibility.

[7] A. Mosaddeghi Zhang,et al. Effect of Nearby Buildings on Electromagnetic Fields from Lightning , 2009 .

[8] V. Rakov,et al. Electromagnetic Fields at the Top of a Tall Building Associated With Nearby Lightning Return Strokes , 2007, IEEE Transactions on Electromagnetic Compatibility.