Results 121 to 130 of about 21,667 (162)
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Roman engineering [overhead power line history]
Proceedings of the IEEE, 2003A modern engineer visiting Rome, as the author did recently, cannot fail to be impressed by the work of the Roman engineers of 2000 years ago. However much manual labor was available in the capital of the empire, the planning and construction of the Colosseum and the Pantheon were magnificent engineering achievements.
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The measurement of corrosion in overhead power lines
Anti-Corrosion Manual, 1988One of the factors giving rise to failure of steel reinforced aluminium power line conductors (ACSR) is corrosion due to the loss of zinc galvanising from the steel. As the zinc coating deteriorates, so galvanic corrosion of the aluminium sets in, resulting in weakening of the conductor, overheating and eventual failure. The corrosion occurs within the
P.H. Schwabe, D. Pike
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Electrothermal analysis of overhead power lines
2012 IEEE International Conference on Industrial Technology, 2012In this work a complete coupled electrothrmal analysis of overhead power lines is presented. The electromagnetic field problem is soved analytically for both the AAC and ACSR cases. The Joule losses thus computed are input to the thermal problem yielding the analytical expression of the thermal impedance.
A. Papagiannakis +4 more
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Resultant reactive power of overhead lines
Proceedings of the IEE Part C: Monographs, 1956A method is demonstrated for arriving at simple formulae by which the resultant reactive power of overhead lines under any load condition can be quickly calculated, and in which the only line constant necessary to be known is the inductance. Tables of practical overhead-line inductances are given.
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MultiSpectrum Inspection of Overhead Power Lines
Proceedings of the 20th International Conference on Informatics in Control, Automation and Robotics, 2023Ronnier Frates Rohrich +1 more
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Vibration damper for overhead power lines
The Journal of the Acoustical Society of America, 2006This invention relates to the design and manufacture of Stockbridge type vibration dampers for overhead power transmission lines. The invention provides a Stockbridge vibration damper comprising a pair of damping weights joined by a stranded steel cable, a clamp attached to the cable at a location intermediate the weights for attachment to an overhead ...
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Electromagnetic Field Produced by Overhead Power Lines
2000In this paper the investigation of the EMF under the overhead transmission lines with different pole structure is perfomed. The computations are directed towards improving the analytical models for predicting electromagnetic fields and finding lines with reduced EMF emission, therefore with a reduced influence on human helth. A field theory approach is
Nikolovski, Srete +2 more
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Sensing Overhead Power Lines for Accident Prevention
Transactions of the ASAE, 1994Accidental contacts between farm equipment and overhead power lines contribute to the poor safety record of agriculture. Contact is commonly with an auger or irrigation pipe being moved by hand or with a tall piece of equipment being towed by a vehicle.
null N. L. Buck, null W. L. Schmidt
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Limiting electric fields of HVDC overhead power lines
Radiation and Environmental Biophysics, 2014As a consequence of the increased use of renewable energy and the now long distances between energy generation and consumption, in Europe, electric power transfer by high-voltage (HV) direct current (DC) overhead power lines gains increasing importance. Thousands of kilometers of them are going to be built within the next years.
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Phi-OTDR Based On-Line Monitoring of Overhead Power Transmission Line
Journal of Lightwave Technology, 2021Feng Wang, Yixin Zhang, Zhewen Ding
exaly