Publication detail

Application of Thermal Models of Digital Protective Relays in Cable Protection

ORSÁGOVÁ, J. CHMELA, M.

Original Title

Application of Thermal Models of Digital Protective Relays in Cable Protection

Type

conference paper

Language

English

Original Abstract

Certain sophisticated digital relays offer the possibility of protecting cables by means of a thermal model with parameter setting using the knowledge of the cable heating time constant and given operating conditions. The principle of the thermal model is based on the theory of heating up a conductor by the flowing current and therefore it is necessary to know to what extent the theory is respected by the relay and what consequences its application brings. The paper presents a comparison between the simulation of heating a real cable by means of a mathematical model and the algorithm for analyzing the cable temperature used in digital relays. It also deals with the definition of the thermal model breaking characteristic as a parametric function of the cable rated current capable of selective setting of the relay and its coordination with the protective system.

Keywords

power cable protections, thermal model, heating time constant

Authors

ORSÁGOVÁ, J.; CHMELA, M.

RIV year

2007

Released

20. 9. 2007

Publisher

TECHNICAL UNIVERSITY OF KOSICE

Location

Košice

ISBN

978-80-553-0400-7

Book

PROCEEDINGS OF IVth INTERNATIONAL SCIENTIFIC SYMPOSIUM ELEKTROENERGETIKA 2007

Pages from

487

Pages to

490

Pages count

4

BibTex

@inproceedings{BUT23240,
  author="Jaroslava {Orságová} and Michal {Chmela}",
  title="Application of Thermal Models of Digital Protective Relays in Cable Protection",
  booktitle="PROCEEDINGS OF IVth INTERNATIONAL SCIENTIFIC SYMPOSIUM ELEKTROENERGETIKA 2007",
  year="2007",
  pages="487--490",
  publisher="TECHNICAL UNIVERSITY OF KOSICE",
  address="Košice",
  isbn="978-80-553-0400-7"
}