DocumentCode :
1117160
Title :
Effect of Tower Displacement of Parallel Transmission Lines on the Magnetic Field Distribution
Author :
Ismail, Hanafy Mahmoud
Author_Institution :
Dept. of Electr. Eng., Coll. of Technol. Studies, Shuwaikh
Volume :
23
Issue :
4
fYear :
2008
Firstpage :
1705
Lastpage :
1712
Abstract :
The effect of tower displacement of two parallel transmission lines on the magnetic field distribution is extensively studied. Two parallel lines with the same working voltage and having the same span, where artificial tower displacement is made, are modeled and the analysis of the magnetic field distribution is conducted. Natural tower displacements resulting from two parallel transmission lines with different span lengths and different voltages are also simulated to investigate the effect of displacement distance on the field distribution under and around these lines. Typical parallel lines of 275- and 132-kV, running in Kuwait, are modeled for both types of displacement and lateral magnetic field profiles are developed and analyzed. In addition to the effect of tower displacement value on the magnetic field distribution, the effects of one line disconnection, spacing between the parallel lines, phase conductors arrangements and the transmission line loading are examined. The magnetic vector potential concept, as extended to multiconductor transmission lines is used to model and calculate the magnetic field distribution under and around the parallel lines for the different mentioned operating conditions. The presented graphs are useful for setting the maximum allowable line current magnitude, for existing lines, corresponding to a certain safe level of the magnetic field at the edge of right of way.
Keywords :
magnetic fields; poles and towers; power transmission lines; displacement magnetic field profiles; lateral magnetic field profiles; magnetic field distribution; magnetic vector potential concept; multiconductor transmission lines; natural tower displacements; parallel transmission lines; phase conductors arrangements; transmission line loading; voltage 132 kV; voltage 275 kV; Environmental effect; magnetic field; magnetic vector potential; parallel transmission lines; right-of-way; tower displacement;
fLanguage :
English
Journal_Title :
Power Delivery, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8977
Type :
jour
DOI :
10.1109/TPWRD.2008.919029
Filename :
4480137
Link To Document :
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