Upgradation of EHVAC Lines by Composite AC-DC Transmission

Abstract

In this present time of populated cities, it is difficult to carry out new layout of transmission line as it not economical as per environment and right of way, even though the demands of loads increase. Also, power transfer is less than to its fullest as the conductors cannot be loaded to its thermal loadability due to transient stability and temperature factor. So, this project shares us an idea of increasing power transfer by superimposing DC current on the AC current in the conductors to its thermal limits. DC power ow is very much independent to transient instability. A bipolar AC circuit line will be used as composite AC-DC power transmission which will help in to have good stability and eliminating oscillations. All previous structures and equipments of the original line will remain as it is.