About Transformers Reliability Characteristics in Main Electrical Grids of Power Systems

Abdurakhmanov, Abdula; Scientific, Jsc; Vasilenko, Nikita; Glushkin, Sergey; Plotnikov, Vladislav; Shuntov, Andrey; Mpei, Nru

doi:10.24160/0013-5380-2018-4-26-30

Cited by 2 publications

(2 citation statements)

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“…As for 500 kV overhead power lines, it was directly stated in [8] that ɷ ∑ =2.5 1/(year 100 km) cannot be regarded as a natural reflection of their peculiarities: the data covered only the first experience of operation of overhead power lines from Volga HPPs to Moscow, when the «dancing» of wires was the main cause of emergency outages of these lines. The parameters of the flow of unrecoverable failures in [2,3,5,6] are generally comparable, despite the fact that, say, the statistical sample [3] covered the time period from 2002-2007, and [5,6] -the period up to the mid-1980s of the last century. The reason lies in the fact that failures in the core networks are subjected to thorough investigations with subsequent development of organizational and technical measures to prevent them.…”

Section: Accident Analysismentioning

confidence: 99%

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Accident analysis of 220, 500 kV overhead lines of the main power systems network

Galiaskarov,

Misrikhanov,

Ryabchenko

et al. 2023

E3S Web Conf.

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The statistical analysis of overhead lines (OHL) of the unified national power grid (UNPG) of the Central European part of the country for the previous 15 years is subjected to statistical analysis. The structure of the failure flow parameter (failure frequency) of 220 and 500 kV overhead lines with a total length of 17.6 and 8.5 thousand kilometers, respectively, is compared. It is shown that the last decade is characterized by the most favorable reliability characteristics. At the same time, a tendency was detected, when the parameter of overhead line failure flow became insignificantly dependent on the nominal voltage of the network. This fact makes us doubt the existing belief of specialists, according to which the specific (per 100 km) failure rate of overhead transmission lines decreases with the increase of the nominal voltage of the network. The above trend once again demonstrates the objective possibility of purposeful management of electric networks reliability.

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Section: Accident Analysismentioning

confidence: 99%

“…Let us turn to the parameters characterizing the accident rate of overhead power lines. Among the data from [2][3][4][5][6][7] stands out the work [4], which, in fact, is the desktop book of the country's design engineers. It refers to the use of statistical data [6].…”

Section: Accident Analysismentioning

confidence: 99%