English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The service life of a transformer was determined by the aging state of solid insulation. When the aging state of the transformer insulation reaches a certain level, oil replacement or oil filter was performed to improve the insulation ability of the insulating oil. A series of treatments of insulating oil inevitably result in the loss of furfural in the oil. In order to study the effect of oil replacement on the furfural content in oil, oil-paper insulation samples with different aging degrees were prepared under laboratory conditions. Besides, oil replacement was carried out in different aging stages, and the times of oil replacement was divided into once and multiple. Furthermore, the furfural content in oil was compared before and after oil replacement, and the effect of oil replacement on the furfural content in transformer oil was analyzed. The results showed that oil replacement had little effect on furfural content in the early aging stage, while it has a greater effect on furfural content in the late aging stage. In addition, the cumulatively of multiple oil replacement on the loss of furfural in oil can cause greater deviations in transformer aging evaluation. Therefore, the effect of oil replacement on the evaluation of insulation aging of transformer is not negligible.

Study on the Influence of Oil Replacement on Furfural Content in Transformer Oil and Insulation Aging Assessment