Localization of faults on power transmission lines using traveling wave theory (TWT)

Transmission lines are designed to transfer electric power from source locations to distribution networks. However, their lengths are exposed to various faults. Protective relay and fault recorder systems, based on fundamental power frequency signals, are installed to isolate the faulty line and provide the fault position. However, the error is high especially in transmission lines. This work investigates the problem of fault localization using travelling wave current signals obtained at a single-end of a transmission line and/or at multi-ends of a transmission network.