Electromagnetic compatibility of high voltage transmission lines and the guidance of center pivot irrigation units with cornering systems

A study was carried out to determine if electromagnetic fields of high voltage transmission lines can interfere with electromagnetically guided cornering systems associated with some center pivot irrigation units. Using electromagnetic susceptibility tests, it was found that 60 hertz magnetic fields...

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Bibliographic Details
Published in:IEEE transactions on power delivery 1998-10, Vol.13 (4), p.1230-1237
Main Authors: Olsen, R.G., Heins, G.L.
Format: Article
Language:English
Subjects:
Applied sciences
Disturbances. Regulation. Protection
Electrical engineering. Electrical power engineering
Electrical power engineering
Electromagnetic compatibility
Electromagnetic fields
Electromagnetic interference
Exact sciences and technology
Frequency
Irrigation
Magnetic fields
Magnetic susceptibility
Power networks and lines
System testing
Transmission lines
Voltage
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Summary:A study was carried out to determine if electromagnetic fields of high voltage transmission lines can interfere with electromagnetically guided cornering systems associated with some center pivot irrigation units. Using electromagnetic susceptibility tests, it was found that 60 hertz magnetic fields of more than approximately 500 mG (milligauss) are required to cause interference with the operation of one system. This level is significantly higher than those found near most high voltage transmission lines. It was also found that the magnetic fields at harmonic frequencies and wideband fields due to corona on the transmission line studied were insufficient to cause interference with cornering guidance systems. Observations of center pivot cornering systems operating properly near 345 kV transmission lines in Nebraska, USA, confirmed these results.
ISSN:0885-8977
1937-4208
DOI:10.1109/61.714489