Effects of series capacitors in transmission lines

THE LOAD capability and performance of high-voltage transmission lines can be improved by the installation of series capacitors. Some reasons for the application of series capacitors to transmission circuits are: 1. To effect the desired load division between parallel circuits. 2. To increase the load capacity of a transmission line by a nominal amount (0 to 50 per cent). 3. To provide increased line capacity so that the system can handle short-time emergency loads. 4. To increase the transient stability limits of a system. 5. To improve voltage regulation and power factor for a given load condition by reducing the operating angle of the line.