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Development of Compact Overhead Power Transmission Line Tower using 8-legged Configuration
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For transmission of electricity from power generation plant to substations, 4-legged lattice towers and monopoles are widely used, but the monopoles are much costlier than 4-legged lattice towers. To avoid the use of monopoles, in the present work, an approach has been adopted to use a special lattice type structure with eight legs. A 220kV multi-circuit suspension tower with 0 to 2o deviation has been considered for present study. The detail explanations, like, tower geometry, load calculations, analysis and design of the proposed structure has been covered in the paper. It has been observed that land requirement can be considerably minimized by use of the proposed 8-legged tower. The cost of the 8-legged tower is slightly higher than a 4-legged tower but much lesser than that of monopoles as the total weight of steel required is very less as compared to monopole. The results obtained from the study of the proposed tower have been compared with 4-legged tower and monopole. This paper discusses the feasibility of using the transmission line tower with 8-legs. The paper also discusses a comparative study of cost, right of way, height and base width of 4-legged tower and monopole with proposed 8-legged tower.
Keywords
Compact Lattice Tower, Land Cost, Monopole, Right of Way, 8-legged Tower
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