The effect of altitude on the operation performance of low-voltage switchgear and controlgear components

Heberlein, G.E.; Malkowski, C.; Cibulka, M.J.

doi:10.1109/28.980375

Cited by 5 publications

(1 citation statement)

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“…The dielectric strength and transient overvoltage withstand levels are critical factors to design external insulation in power transmission systems [6]. In particular, high altitude decreases the air density which in turn lowers the dielectric withstand voltage for a given geometry and the overload capacity or thermal ampacity rating among others [7]. Effects such as pollution or icing occurring in high-altitude areas also lowers the dielectric performance of air-insulated systems [8].…”

Section: Introductionmentioning

confidence: 99%

Voltage Correction Factors for Air-Insulated Transmission Lines Operating in High-Altitude Regions to Limit Corona Activity: A Review

Riba

Larzelere²,

Rickmann

2018

Energies

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Nowadays there are several transmission lines projected to be operating in high-altitude regions. It is well known that the installation altitude has an impact on the dielectric behavior of air-insulated systems. As a result, atmospheric and voltage correction factors must be applied in air-insulated transmission systems operating in high-altitude conditions. This paper performs an exhaustive literature review, including state-of-the-art research papers and International Standards of the available correction factors to limit corona activity and ensure proper performance when planning air-insulated transmission lines intended for high-altitude areas. It has been found that there are substantial differences among the various correction methods, differences that are more evident at higher altitudes. Most high-voltage standards were not conceived to test samples to be installed in high-altitude regions and, therefore, most high-voltage laboratories are not ready to face this issue, since more detailed information is required. It is proposed to conduct more research on this topic so that the atmospheric corrections and altitude correction factors found in the current International Standards can be updated and/or modified so that high-voltage components to be installed in high-altitude regions can be tested with more accuracy, taking into account their insulation structure.

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Section: Introductionmentioning

confidence: 99%