Cristin-resultat-ID: 1863579
Sist endret: 16. april 2021, 12:13
NVI-rapporteringsår: 2020
Vitenskapelig artikkel

Reliability of supply and the impact of weather exposure and protection system failures

  • Erlend Sandø Kiel og
  • Gerd Hovin Kjølle


Applied Sciences
ISSN 2076-3417
e-ISSN 2076-3417
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2020
Publisert online: 2020
Trykket: 2021
Volum: 11:182
Hefte: 1
Sider: 1 - 15
Open Access


Scopus-ID: 2-s2.0-85098781337

Beskrivelse Beskrivelse


Reliability of supply and the impact of weather exposure and protection system failures


Extreme weather is known to cause failure bunching in electrical transmission systems. However, protection systems can also contribute to the worsening of the system state through various failure modes—spontaneous, missing or unwanted operation. The latter two types of failures only occur when an initial failure has happened, and thus are more likely to happen when the probability of failure of transmission lines is high, such as in an extreme weather scenario. This causes an exacerbation of failure bunching effects, increasing the risk of blackouts, or High Impact Low Probability (HILP) events. This paper describes a method to model transmission line failure rates, considering both protection system reliability and extreme weather exposure. A case study is presented using the IEEE 24 bus Reliability Test System (RTS) test system. The case study, using both an approximate method as well as a time-series approach to calculate reliability indices, demonstrates both a compact generalization of including protection system failures in reliability analysis, as well as the interaction between weather exposure and protection system failures and its impact on power system reliability indices. The results show that the inclusion of protection system failures can have a large impact on the estimated occurrence of higher order contingencies for adjacent lines, especially for lines with correlated weather exposure.


Erlend Sandø Kiel

  • Tilknyttet:
    ved Institutt for elkraftteknikk ved Norges teknisk-naturvitenskapelige universitet

Gerd Hovin Kjølle

  • Tilknyttet:
    ved Energisystemer ved SINTEF Energi AS
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