i am going to do project on this topic. plz help me by giving project abstract..
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ppt for icing of power transmission line in wikipedia

Abstract

In communications and electronic engineering, a transmission line is a specialized cable or other structure designed to carry alternating current of radio frequency, that is, currents with a frequency high enough that their wave nature must be taken into account. Transmission lines are used for purposes such as connecting radio transmitters and receivers with their antennas, distributing cable television signals, trunklines routing calls between telephone switching centres, comput ....etc

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please send the ppt and documentation of icing of power transmission lines ....etc

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ICING OF POWER TRANSMISSION lines during winter storms are a persistent problem that causes outages and costs millions of dollars in repair expenses. High-frequency excitation at approximately 8-200 kHz has been proposed as a method to melt ice. The method works by a combination of two mechanisms. At these frequencies, ice is a lossy dielectric, causing heating directly in the ice. In addition skin effect causes current to flow only in a thin layer on the surface of the line, causing resistive losses and consequent heating.In this article, w ....etc

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To get full information or details of POWER UPGRADING OF TRANSMISSION LINE BY COMBINING AC DC TRANSMISSION please have a look on the pages

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http://seminarsprojects.net/Thread-power-upgrading-of-transmission-line-by-combining-ac

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http://seminarsprojects.net/Thread-power-upgrading-of-transmission-line-by-combining-ac

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Power Upgrading of Transmission Line
by Combining AC DC Transmission



H. Rahman and B. H. Khan, Senior Member, IEE


abstract

Abstract
Long extra high voltage (EHV) ac lines cannot be loaded to their thermal limits in order to keep sufficient margin against transient instability. With the scheme proposed in this paper, it is possible to load these lines very close to their thermal limits. The conductors are allowed to carry usual ac along with dc superimposed on it. The added dc power flow doe ....etc

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