Comparison of Transmission Losses and Voltage Regulation of Overhead and Gas Insulated Transmission Line

Abstract

In an Electrical power system, the generating plants are located far away from the loads and gets transmitted through transmission lines. The transmission line can be an overhead line or underground cable. For the last forty-five years, a new technology GITL has been presented as a substitute for underground cables. Since GITL is capable of handling a large capacity of electrical power over to the overhead transmission lines. The area of the GITL conductor is very large and due to that, the low resistances cause very low losses in the transmission lines. The parameters can maintain by pressurized insulated gases, GITL is best suitable for Extra High voltage transmission. In metro cities where space and Right of Way making overhead lines problematic, GITL may be our future lines and it will solve big population issues. In this paper, the percentage voltage regulation and losses of the same voltage rating overhead lines are compared with compressed GITL lines. MATLAB is used for the simulation and the parameters of overhead and GITL lines of the same rating voltages (220kV, 400 kV, 765kV, 1100kV). The transmission line length is taken as 200 km in all examples. The losses and voltage regulation comparisons have been represented.