Application of Hybrid Signal Processing Technique in Protection of Series Compensated Transmission Line

Abstract

As electricity demand increases day-by-day, power engineers strive to generate and transmit as much power as possible via the preinstalled transmission lines. Series compensation have become popular option in long transmission lines worldwide as it increases the transmission capacity of the system. But due to the use of series compensation (capacitors), transmission line protection becomes complex due to various changes in the line parameters, looking from the point of relay installation such as change in impedance, current and voltage inversion. Existing protection concepts will have to be modified to accommodate these issues. A protection algorithm (PA) based on three signal processing techniques is proposed in this paper for identification and categorization of faults in series compensated electrical transmission network. Study has been done and validated on MATLAB/Simulink environment.