Effects of aging processes and varying humidity on the breakdown voltage of mineral oil in switchgear

Title

Effects of aging processes and varying humidity on the breakdown voltage of mineral oil in switchgear

 Author

Yu, M.

Contributor

Djairam, D. (mentor)

Faculty

Electrical Engineering, Mathematics and Computer Science

 Department

High-Voltage Technology and Management

 Date

2011-12-13

 Abstract

Previous research has shown that in non-hermetically sealed medium voltage oil insulated switchgear (MV OIS), the insulating oil will absorb water from the ambient air. The humidity of oil highly influences the breakdown voltage of oil. The humidity of oil, in turn, is influenced by the acidity of oil which will change during the aging processes of oil. Moreover, experience on the influence of copper due to switching actions of switchgear on the chemical and electrical aging process of oil is rare. Chemical and electrical aging of oil can influence the humidity and breakdown voltage (BDV) of oil. To address this situation, it is necessary to determine the influence of changing properties of oil on the BDV of said oil in switchgear. The goal of the research is to reduce the risk of breakdown of oil in OIS. Therefore, this thesis focuses on the BDV of insulating oil and quantifies the influence of related factors on the BDV of oil. Stedin can apply this knowledge in order to reduce the risk of failures related to the breakdown of insulating oil.

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 Embargo date

2012-01-20

 Part of collection

Student theses

 Document type

master thesis

 Rights

(c) 2011 Yu, M.
Files
PDF Thesis_Miao_Yu.pdf 16.1 MB
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