| For the transmission of electric power from generating stations to load centers and grids the transmission lines are used. Smart energy consumption and electricity market prices required transmission lines to connect power houses to load centers which is named as smart grid. Mostly thermal power stations are located near to load centers.For transmission lines, there are overhead and underground transmission lines. In underground transmission there are underground cables and from last 40 years a new technology GIL is introduced, which is the best replacement for underground cables. GIL is available having low transmission losses, low capacitive load, high level of personal safety, high reliability without any electrical ageing, having minimum interference with magnetic fields and many more.GIL has same operation like overhead lines because both are gas insulated lines and have same type of conductors. In my research I will compare the 500KV overhead line to 500KV GIL line. History shows that GIL is mostly used of minimum length because of its installation cost but it can recover its cost because it has very low line losses than overhead lines. So in this research GIL as a short transmission line is compared with another short transmission line which is overhead mainly the operational cost, power handling capability and line losses.GIL is a future technology which will replace the transmission line due to increasing of populated areas. The comparison between GIL and overhead is done. It is found that GIL is much more better than overhead lines but due to huge cost it is not operated fully... |
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