Computer Aided Design, Analysis And Comparison Of Various Configurations Of E.H.V. Transmission Line

Abstract

Power demand had a drastic raise in past few decades. To ful l the power demand, transmission line become an vital part of power system. As power generating units are at a far distant from user, transmission of power to consumer is only possible via transmission and distribution lines. Optimum design of transmission line is es- sential and it requires proper selection of voltage level, number of circuit required, type of conductor, number of sub-conductor in a bundle, spacing between adjacent sub-conductor, clearances etc. The manual method of transmission line design involves tedious calculation and rely on the knowledge and experience of designer. Computational design of transmission line gives faster result and wide vision of the probable solutions. According to the existing constraint variable, design parameters and solution varies. For EHV trans- mission line design, certain areas are given more importance, such as corona loss, electric and magnetic elds.Transmission line designing is done in such a way that conductor has low losses, high e ciency, good voltage regulation, less RI, TVI and AN. By using high order bundled conductor, corona loss, AN, RI are reduced. As these loss increases with the raise in voltage level, so in case of EHV and UHV trans- mission level bundled conductor are used. This report provided an insight into design of transmission line. Almost all the electrical calculation are discussed which are required for EHV transmission line de- sign. These calculations are required for selection of appropriate conductor for power transmission, at extra high voltage level. A C# based software is developed so as to calculate all electrical parameter required for transmission line design. Programme is developed for single and double circuit transmission line, including upto eight sub- conductor in a bundle. By employing this user friendly software, a range of options can be obtained.