Distance and overcurrent relay coordination considering non standardized inverse time curves

Castillo Salazar, Carlos Alberto (2015) Distance and overcurrent relay coordination considering non standardized inverse time curves. Especialidad thesis, Universidad Autónoma de Nuevo León.

Vista previa
1080215492.pdf - Versión Aceptada
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (8MB) | Vista previa


Protective relaying comprehends several procedures and techniques focused on maintaining the power system working safely during and after undesired and abnormal network conditions, mostly caused by faulty events. Overcurrent relay is one of the oldest protective relays, its operation principle is straightforward: when the measured current is greater than a specified magnitude the protection trips; less variables are required from the system in comparison with other protections, causing the overcurrent relay to be the simplest and also the most difficult protection to coordinate; its simplicity is reflected in low implementation, operation, and maintenance cost. The counterpart consists in the increased tripping times offered by this kind of relays mostly before faults located far from their location; this problem can be particularly accentuated when standardized inverse-time curves are used or when only maximum faults are considered to carry out relay coordination. These limitations have caused overcurrent relay to be slowly relegated and replaced by more sophisticated protection principles, it is still widely applied in subtransmission, distribution, and industrial systems. In this work, the use of non standardized inverse-time curves, the model and implementation of optimization algorithms capable to carry out the coordination process, the use of different levels of short circuit currents, and the inclusion of distance relays to replace insensitive overcurrent ones are proposed methodologies focused on the overcurrent relay performance improvement. These techniques may transform the typical overcurrent relay into a more sophisticated one without changing its fundamental principles and advantages. Consequently a more secure and still economical alternative can be obtained, increasing its implementation area

Tipo de elemento: Tesis (Especialidad)
Información adicional: Tesis (Doctor en Ingeniería Eléctrica) UANL, 2015.
Materias: T Tecnología > TJ Ingeniería Mecánica
Divisiones: Ingeniería Mecánica y Eléctrica
Usuario depositante: Editor Repositorio
Fecha del depósito: 28 Jul 2016 20:31
Última modificación: 22 Sep 2016 18:49
URI: http://eprints.uanl.mx/id/eprint/10995

Actions (login required)

Ver elemento Ver elemento


Downloads per month over past year