An enhanced travelling wave-based fault detection and location estimation technique for series compensated transmission network

A robust technique to enhance the fault detection, and location estimation for series compensated transmission lines is presented in this paper based on travelling waves applying Fast Discrete S-transform (FDST). The FDST of the modal components of retrieved currents is obtained at each terminal to find the arrival time of the first transient wave generated by the fault. The proposed scheme comprises of identifying the terminal with fastest arrival time of transient to find the faulted section and determine the fault location by calculating proper distance index. The simulation results have shown good performance of the proposed technique for various fault types, fault locations, fault resistances, fault inception angles, faulted sections, change in TCSC parameters and varying wind speeds when connected to windfarm. The performance of the proposed protection scheme is validated on the real-time digital simulator (RTDS) platform enhancing its applicability for the series compensated multi-terminal line.