International Journal of Engineering and Information Systems (IJEAIS)   Year: 2020 | Volume: 4 | Issue: 8 | Page No.: 241-251 Single-End Measuring Scheme for Open Conductor Fault Detection Based on Discrete Wavelet Transform in HV Transmission Lines Basem Abd-Elhamed Rashad, Doaa K. Ibrahim, Mahmoud I. Gilany, Aboul'fotouh El'gharably Abstract: This article provides a novel adaptive single-end measuring scheme to identify (detect and classify) faults in HV transmission systems using Discrete Wavelet Transform. Fault identification scheme is sensitive and automated for solving the present challenges such as high-impedance faults (HIFs) and open conductor fault (OCF). The proposed scheme unit (PSU) estimates the threshold values adaptively according to the pre-fault value of wavelet decomposed current approximation coefficient. Comprehensive EMTP / ATP simulations are used to evaluate PSU performance. PSU is investigated with various faults types, different locations, and different fault resistance and inception angles on a 500 kV, 350 km transmission line. The simulation results have shown that the PSU can detect OCFs, LIFs and HIFs correctly, using one end current signals. The results demonstrate that the PSU is fast, robust, precise and reliable.