Reduction of Transient Magnetic Field Due to Lightning by a Shielded Room in a Building

The protection of a control center from transient currents and voltages due to lightning is an important problem. This paper investigates the effect of a shielded room on transient currents and induced magnetic fields in the room. The experimental and FDTD simulation results in a scaled-down shielde...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on electromagnetic compatibility 2016-02, Vol.58 (1), p.135-142
Main Authors: Asada, Takashi, Ametani, Akihiro, Uchida, Hajime, Endo, Tetsuo, Irie, Shunsuke, Yonezawa, Kaname
Format: Article
Language:English
Subjects:
Current measurement
Experiment
Finite difference methods
lightning
Magnetic fields
Magnetic noise
Magnetic shielding
on-site test
shielded room
Simulation
Time-domain analysis
time-domain finite-difference method (FDTD)
Transient analysis
transient magnetic field
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The protection of a control center from transient currents and voltages due to lightning is an important problem. This paper investigates the effect of a shielded room on transient currents and induced magnetic fields in the room. The experimental and FDTD simulation results in a scaled-down shielded room show that steel poles around the room can reduce the transient magnetic fields noticeably, and the magnetic fields inside the shielded room are reduced to about one-third. An on-site test in a skyscraper under construction is carried out, and the transient magnetic field in a server room of a control/data center is measured to show that it is reduced to nearly two-thirds by shielded meshes when lightning strikes the building. The FDTD simulations show a reasonable accuracy in comparison with the experimental and on-site test results, and can be applied to design a shielded room.
ISSN:0018-9375
1558-187X
DOI:10.1109/TEMC.2015.2493439