Risk of power cables insulation failure due to the thermal effect of solar radiation - Publikacja - MOST Wiedzy

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Risk of power cables insulation failure due to the thermal effect of solar radiation

Abstrakt

Low-voltage, as well as high-voltage power cable lines, are usually buried in the ground. The ampacity of the power cables in the ground mainly depends on the thermal resistivity of the soil, which may vary in a wide range. A common practice in power cable systems performance is to supply them from a pole of an overhead line. If so, a section of the line is located in free air and can be directly exposed to solar radiation. In some cases, the ampacity of power cables placed in free air is lower than in the ground. Differences in ampacities can be very high if thermal resistivity of the soil is very low, and simultaneously solar irradiation of cables in air occurs. This paper presents the risk of power cables overheating and in consequence the risk of their failure, when part of the underground power cable line is placed in free air. Temperature distribution of cables in the air (with and without solar radiation) for various load currents is presented. Thermal endurance of power cables insulation, operating with the overheating, is estimated.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
Eksploatacja i Niezawodność - Maintenance and Reliability nr 22, strony 232 - 240,
ISSN: 1507-2711
Język:
angielski
Rok wydania:
2020
Opis bibliograficzny:
Czapp S., Szultka S., Ratkowski F., Tomaszewski A.: Risk of power cables insulation failure due to the thermal effect of solar radiation// Eksploatacja i Niezawodność - Maintenance and Reliability -Vol. 22,iss. 2 (2020), s.232-240
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.17531/ein.2020.2.6
Weryfikacja:
Politechnika Gdańska

wyświetlono 37 razy

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