Indian Institute of Technology, Kharagpur.
Increasing industrial developments in India resulted in the necessity of transmission of larger bloclcs of power over longer distances. Use of series capacitors in the power lines helps to improve voltage regulations, parallel operation of lines and above all the stability on longer distance, The important features of capacitor installations are properly designed units of capacitor battery for specified over-loads and over-voltages, capacitor protective devices, and operating characteristics of the spark gaps. The degree of improvement in the steady state stability limits for different degrees of compensation is shown in a curve for surge-impedance loading and other loadings. Also shown in a curve are the rate of power increase using series compensation, additional reactive power loss, and reactive power of capacitor battery as a ratio of power corresponding to uncompensated line against degree of compensation. Abnormal conditions which lower the transient stability limits are discussed.
