Review On High Voltage Direct Current (Hvdc) Transmission System.

In early days of electricity supply, firstly we use to transmit electric supply in direct current (DC) mode. At firstly the electricity was generated by Thomas Alva Edison in 1980s was DC only. The main drawback of direct current (DC) was, it can only used for long transmission system only. To overcome this drawback leads to invention of alternate current (AC). This paper details about High Voltage Direct Current (HVDC) Transmission System, which works on the components like converting stations, converting units, converting valves, DC filters, AC filters, capacitor bank, transmission medium. This paper also detail about design, construction, operation and maintenance of HVDC transmission system. Another important lead for invention of AC is economical impact. DC is used for supply of long transmission systems, which leads to increase in cost for short transmission systems. It also details about applications of HVDC transmission system. • The first commercial HVDC transmission system as established in Gotland 1 in Sweden 1954. • The first commercial HVDC transmission system in India at Rihand-Dadri in 1991. [ABSTRACT FROM AUTHOR]