Long-Lifetime Event-Driven Wireless Monitoring System for Pole-Mounted Transformers

Kwak, Seung Soo; Im, Yun Chan; Kim, Yong Sin

doi:10.3390/app11167313

Cited by 2 publications

(2 citation statements)

References 27 publications

(59 reference statements)

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“…The insulation system is the most temperature-sensitive component of a transformer. For this reason, according to many authors, the lifetime of a transformer is the same as the lifetime of its insulation system [25][26][27].…”

Section: Effects Of Increased Temperature In the Transformermentioning

confidence: 99%

The Tools and Parameters to Consider in the Design of Power Transformer Cooling Systems

Goscinski,

Nadolny,

Nawrowski

et al. 2023

Energies

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Transformers are the most important elements of electric power systems. Many conditions must be met for power transformers to work properly. One of them is a low operating temperature. This condition will be met if the transformer cooling system is properly designed. One of the components of a cooling system is insulating liquid. The heat transfer coefficient α of liquid determines its ability to cool the transformer. The higher its value, the more effectively the liquid transfers heat to the environment. This article describes the influence of the position of the heat source, which is usually in the windings of the transformer, on the coefficient α value of the insulating liquid. The vertical and horizontal positions of the heat source were analyzed. The coefficient α was analyzed at different points of the heat source. The tests were carried out for mineral oil and various esters. Heat transfer coefficient measurements were carried out for various surface heat loads of the heat source. It has been proven that, in the case of a horizontal heat source, the coefficient α has a value several dozen percent higher than in the case of a vertical source. It has been proven that the coefficient α has different values in different places of the heat source. Regardless of the location, the highest value of the coefficient α occurred in the lower part of the heat source.

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Section: Effects Of Increased Temperature In the Transformermentioning

confidence: 99%

The Tools and Parameters to Consider in the Design of Power Transformer Cooling Systems

Goscinski,

Nadolny,

Nawrowski

et al. 2023

Energies

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show abstract

“…However, it has a number of limitations and challenges. Firstly, the limited lifetime of batteries leads to the problem that devices need to be replaced frequently when the battery is exhausted [5,6] . This not only increases the maintenance costs, but also may lead to device downtime during battery replacement, thus increasing the risk of power network failure.…”

Section: Introductionmentioning

confidence: 99%