Power enhancement of transmission lines by combining AC and DC by using MATLAB/SILULINK

now days due to the ever increasing demand of electricity, laying of new transmission lines is needed tremendously. But due to cost and right of way concerns it is not that much easy so we can make use of already established double circuit line to their full capacity by combining these high voltage ac lines with dc. We can utilize the transmission line close to their thermal loading and superimposed power will not cause any instability. This paper shows the possibility of conversion of ac lines into combined alternating current direct current line rather than changing line conductor, line insulators also tower structures, there will be substantial increase in power transfer capacity. This concept is manifested using MATLAB/SIMULINK