Fault Distance Measurement of Series Compensated Lines using ANN

Abstract

This paper presents the effects on the distance protection scheme used by the transmission lines protection system when they are compensated in series by Thyristor Controlled Series Capacitor (TCSC). The usage of TCSC introduces problems to distance protection schemes as there is a change in the measurement of apparent impedance observed by the respective relay. The change seen by the relay measurement has to be corrected for accurate operation of the particular relay, for which we take the help of Artificial Neural Networks which is extensively tested for various test conditions in MATLAB Simulation environment. The relay operation accuracy used for distance protection is improved by using the Artificial Neural Networks training methods and it also shows the distance at which the faults has occurred.