Behaviour of Three Legged 400 kV Double Circuit Steel Transmission Line Tower by Using Different Diaphragm Comparative Study

Ruchita Prakash Nainav; Umesh S. Salunkhe

doi:10.3759/josem.v6i3.3395

Abstract

Power is a vital solution for the growth of any country’s economy. India has the third largest producer of power in the world. As per the Census and Economic Information report, India has 1,06,991 GWh power capacity up to Mar. 2019. So, optimizations of transmission line towers are vital to reduce the cost the power sector and it’s depending on various factors, i.e. materials, size and shape of the section, width, height, types of tower, bracing systems. Three-legged towers save 3.05% land area amid 21.2% steel as compared to four-legged towers and also save one foundation. The paper described the analysis of self-supporting 400 kV double circuit steel three-legged transmission line towers with different diaphragm systems in STAAD. Pro. Software. Adding together, models designed by using angle sections and tube sections. All loads calculated as per IS 802 (1995). The comparative study is presented with respect to critical sections, axial forces, deflections and steel weights in different models. After the final design, saving in steel weight up to 17 to 21% resulted when used tube sections compare with angle sections. The type of diaphragm systems does not take part in a significant role on behaviour of the tower and making light of steel weight in suspension type of towers having 0° to 2°line of deviation.