POWER UPGRADING BY CONVERTING AC LINES TO DC

Overntse last few decades economic growth and industrialization in many countries has led to a rapidly rising demand for Electric power. one effect of this is that the power t ion system have grown in size and complexity ti rought t. the years Theref ore, there is a neel to look at alternatives that substantially increase the ,power transfer capability while at the same time minimize the -needed Right Of or indeed increase the capability of the existing 1, i nes without any : ajor new,. constructicn.This pi par describes how the power transfer capability can be maximized Dy using E'. DC and that it is possible to increase the power . 3.5 times by converting AC lines to DC. Both HV and EHV double circuit and single circui t AC lines of average characteristics have been used as an example for conversion to both monopolar and bipolar DC lines Conversion to HV IC also reduces per unit losses and ennance -. re' iability th r ugh imp -roved lightning performance.HVDC operation has further well proven advantages in optimizing operation of the total system.