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An Aerodynamic Investigation of the Causes of Overhead Electrical Transmission Line GallopSkousen, Eric Nathan 01 April 1973 (has links)
Overhead electrical transmission lines vibrate due to the action of a prevailing wind. These cable vibrations can be classified into two categories— high-frequency and low-frequency. The high-frequency vibrations, "aeolian" vibrations or "singing wires," is a low-amplitude phenomenon. It has been largely controlled with the use of various mechanical dampers [l, 2],
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A Study of the Effects of Some Parameters of the Galloping of Electric Transmission LinesColeman, Leland J. 01 August 1970 (has links)
Freezing rainstorms coupled with moderate winds have often been observed to cause telephone lines and power transmission cables to begin bouncing up and down. This slow frequency high amplitude oscillation, or galloping as it is sometimes called, can build up to large amplitudes before the oscillation either damps out or persists at some constant amplitude. It has been reported by Edwards and Livingston [1] that the amplitude of galloping on transmission lines has been as large as forty feet. Galloping oscillations occur at relatively low frequencies; from .1 to 1 Hz. [1] near the natural frequency of the suspended cable.
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Modeling bone marrow sub-structures at power-line frequenciesChiu, Roanna Sum-Wan. 10 April 2008 (has links)
No description available.
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A MATLAB based analysis tool for clearance and thermal violations in transmission power linesMabuza, Ndumiso Simon January 2016 (has links)
A research report submitted to the faculty of Engineering and the Built Environment,
of the University of the Witwatersrand, Johannesburg, in partial fulfilment of the
requirements for the degree of Master of Science in Engineering
Johannesburg 2014 / Clearances are an important aspect of High Voltage (HV) transmission line design,
construction and maintenance. A software tool that combines clearance violation
analysis and optimum loading operating conditions for power lines could save power
utilities the capital cost of refurbishing transmission power lines that marginally
exceed maximum power line clearance distances. This can be achieved by operating
the power lines at an optimum amperage level for any given set of weather
conditions.
This research project proposes a low cost MATLAB® based software tool that detects
clearance violations and determines operational limits on transmission power lines
using prevalent weather conditions as well as the power line amperage. Various
power lines around the states of Missouri and Illinois in the United States of America
are analysed to test the viability and functionality of the software. In order to validate
the accuracy of the program, the results obtained were compared to results from PLSCADD
®.
Key Words: conductor, clearance, sag, software, temperature / MB2016
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Mathematical considerations of a two-conductor electrical transmission lineGalloway, Richard T. Unknown Date (has links)
No description available.
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Added CFO voltages from fiberglass poles and its electrical degradationLi, Xiaoyong. January 2001 (has links)
Thesis (M.S.)--Mississippi State University. Department of Electrical and Computer Engineering. / Title from title screen. Includes bibliographical references.
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The characteristics of Hong Kong soils in relation to power supply problems.Halfter, N. A., January 1969 (has links)
Thesis (M. Sc.(Eng.))--University of Hong Kong, 1969. / Mimeographed.
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Voltage profile of a shunt compensated EHV transmission lineLazar, Joseph Yvan. January 1980 (has links)
No description available.
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Transient temperature distributions in overhead fiber-optic ground wiresWells, M. Glenn 05 1900 (has links)
No description available.
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Experimental predictions of thermal instability in the soil surrounding underground power cablesBush, Richard Alan 05 1900 (has links)
No description available.
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