Granado Romero, JoaquínTorralba Silgado, Antonio JesúsÁlvarez Arroyo, César2021-01-202021-01-202020-11Granado Romero, J., Torralba Silgado, A.J. y Álvarez Arroyo, C. (2020). Effects of Dispersion and Multi-Path Propagation in Partial Discharges Location. Institute of Electrical and Electronics Engineers Access, 8, 219062-219070.2169-3536https://hdl.handle.net/11441/103988Article number 9281048Dispersion and multi-path propagation distort partial discharge (PD) pulses that travel along power cables. This article proposes a theoretical framework that models the PD source location error owing to these effects. Regarding dispersion a closed-form expression is proposed to estimate the PD bandwidth reduction at the cable ends as well as the expected location error due to propagation velocity variation. A new expression is proposed for the difference of times of arrival (TOAs) which exhibits dependence with frequency. Multi-path propagation also introduces a non-linear dependence with frequency in the TOAs which leads to location errors when the echo is very close to the main PD signal. Three location algorithms (based on cross-correlation phase increment and energy criterion) are investigated under noise dispersion and multi-path conditions. Simulation results show that the energy criterion algorithm is very sensitive to dispersion but it is robust to multi-path propagation. The algorithm based on phase increments is the most sensitive to noise. Finally the best location method for noisy highly dispersive multi-path propagation is the one based on cross-correlation.application/pdf9 p.engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Partial dischargeFault locationPower cablesinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccesshttps://doi.org/10.1109/ACCESS.2020.3042718