Effects of Dispersion and Multi-Path Propagation in Partial Discharges Location
| Autor: | Cesar Alvarez-Arroyo, Antonio Torralba, J. Granado |
|---|---|
| Přispěvatelé: | Universidad de Sevilla. Departamento de Ingeniería Eléctrica, Universidad de Sevilla. Departamento de Ingeniería Electrónica, Universidad de Sevilla. TEP -192 Ingeniería Electrónica, Universidad de Sevilla. TEP-175: Ingeniería Eléctrica |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Physics power cables General Computer Science 020209 energy Acoustics Bandwidth (signal processing) General Engineering 02 engineering and technology 01 natural sciences Fault location Partial discharge 0103 physical sciences 0202 electrical engineering electronic engineering information engineering General Materials Science Multi path fault location lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:TK1-9971 Power cables |
| Zdroj: | IEEE Access, Vol 8, Pp 219062-219070 (2020) idUS. Depósito de Investigación de la Universidad de Sevilla instname idUS: Depósito de Investigación de la Universidad de Sevilla Universidad de Sevilla (US) |
| ISSN: | 2169-3536 |
| Popis: | Article number 9281048 Dispersion 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. Laboratorio de Ingeniería en Energía y Sostenibilidad Ambiental de la Universidad de Sevilla VI Plan Propio de Investigación |
| Databáze: | OpenAIRE |
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