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Application of Thermal Models of Digital Protective Relays in Cable Protection

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F08%3APU73075" target="_blank" >RIV/00216305:26220/08:PU73075 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Application of Thermal Models of Digital Protective Relays in Cable Protection

  • Original language description

    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 thecable rated current capable of selective setting of the relay and its coordination with the protective system.

  • Czech name

    Application of Thermal Models of Digital Protective Relays in Cable Protection

  • Czech description

    Některé moderní digitální ochrany nabízí možnost chránit kabely pomocí tepelného modelu, který lze nasta-vit na základě znalosti časové oteplovací konstanty kabelu a jeho provozních podmínek. Princip funkce te-pelného modelu je založen na teorii oteplování vodiče průchodem proudu, proto je třeba vědět, do jaké míry je tato teorie ochranou respektována a jaké to má důsledky při jejím použití. Článek se zabývá také odvoze-ním vypínací charakteristiky tepelného modelu, která by umožnila jeho selektivní nastavení v systému chránění.

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    JE - Non-nuclear power engineering, energy consumption and utilization

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2008

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Article name in the collection

    Proceedings of the IET 9th International Conference on Developments in Power System Protection

  • ISBN

    978-0-86341-902-7

  • ISSN

  • e-ISSN

  • Number of pages

    4

  • Pages from-to

  • Publisher name

    Neuveden

  • Place of publication

    Glasgow

  • Event location

    Glasgow

  • Event date

    Mar 17, 2008

  • Type of event by nationality

    WRD - Celosvětová akce

  • UT code for WoS article