Upgradation of Existing EHVAC Line by Composite AC-DC Transmission
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seminar surveyer
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02-10-2010, 10:44 AM

Recently proposed concept of simultaneous ac-dc power transmission enables the long EHV ac lines to be loaded close to their thermal limits. The conductors are allowed to carry certain amount of dc current superimposed on usual ac. This paper presents the power up gradation of existing EHV ac line corridor by converting it into composite ac-dc power transmission line. No alterations of conductors, insulator strings or towers of the original line are needed. Simulation study is carried out on PSCAD/EMTDC software package. Index Terms—Power Upgrading, EHVAC Corridor, Simultaneous AC-DC Transmission,
In recent years, public has become more sensitive to the proliferation of overhead transmission right-of-ways. Industrial countries are experiencing increasing difficulty in finding suitable corridors for new overhead transmission lines and in many cases it is simply impossible. There is an increasing pressure to provide the substantial power upgrading of existing ac transmission line corridors.
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