The University of Southampton
University of Southampton Institutional Repository

Review of research progress on the electrical properties and modification of mineral insulating oils used in power transformers

Review of research progress on the electrical properties and modification of mineral insulating oils used in power transformers
Review of research progress on the electrical properties and modification of mineral insulating oils used in power transformers
In November 2017, the first ±1100 kV high-voltage direct-current power transformer in the world, which was made by Siemens in Nurnberg, passed its type test. Meanwhile, in early 2017, a ±1000 kV ultra-high voltage (UHV) substation was officially put into operation in Tianjin, China. These examples illustrate that the era of UHV power transmission is coming. With the rapid increase in power transmission voltage, the performance requirements for the insulation of power transformers are getting higher and higher. The traditional mineral oils used inside power transformers as insulating and cooling agents are thus facing a serious challenge to meet these requirements. In this review, the basic properties of traditional mineral insulating oil are first introduced. Then, the variation of electrical properties such as breakdown strength, permittivity, and conductivity during transformer operation and aging is summarized. Next, the modification of mineral insulating oil is investigated with a focus on the influence of nanoparticles on the electrical properties of nano-modified insulating oil. Recent studies on the performance of mineral oil at molecular and atomic levels by molecular dynamics simulations are then described. Finally, future research hotspots and notable research topics are discussed.
1996-1073
Wang, Xiaobo
21fe0d38-35c3-4c10-a0e7-41ce04498890
Tang, Chao
2aa1528d-e0fb-4f9a-ba6b-fe98d714c36f
Huang, Bo
8213448b-060c-4d70-b898-d00c6ac754a5
Hao, Jian
01bbfea6-2a3e-40b3-bb0c-1c16d6dcd66d
Chen, Guanghui
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Wang, Xiaobo
21fe0d38-35c3-4c10-a0e7-41ce04498890
Tang, Chao
2aa1528d-e0fb-4f9a-ba6b-fe98d714c36f
Huang, Bo
8213448b-060c-4d70-b898-d00c6ac754a5
Hao, Jian
01bbfea6-2a3e-40b3-bb0c-1c16d6dcd66d
Chen, Guanghui
3de45a9c-6c9a-4bcb-90c3-d7e26be21819

Wang, Xiaobo, Tang, Chao, Huang, Bo, Hao, Jian and Chen, Guanghui (2018) Review of research progress on the electrical properties and modification of mineral insulating oils used in power transformers. Energies, 11 (3). (doi:10.3390/en11030487).

Record type: Article

Abstract

In November 2017, the first ±1100 kV high-voltage direct-current power transformer in the world, which was made by Siemens in Nurnberg, passed its type test. Meanwhile, in early 2017, a ±1000 kV ultra-high voltage (UHV) substation was officially put into operation in Tianjin, China. These examples illustrate that the era of UHV power transmission is coming. With the rapid increase in power transmission voltage, the performance requirements for the insulation of power transformers are getting higher and higher. The traditional mineral oils used inside power transformers as insulating and cooling agents are thus facing a serious challenge to meet these requirements. In this review, the basic properties of traditional mineral insulating oil are first introduced. Then, the variation of electrical properties such as breakdown strength, permittivity, and conductivity during transformer operation and aging is summarized. Next, the modification of mineral insulating oil is investigated with a focus on the influence of nanoparticles on the electrical properties of nano-modified insulating oil. Recent studies on the performance of mineral oil at molecular and atomic levels by molecular dynamics simulations are then described. Finally, future research hotspots and notable research topics are discussed.

Text
energies-11-00487-v2 - Version of Record
Available under License Creative Commons Attribution.
Download (4kB)

More information

Accepted/In Press date: 19 February 2018
e-pub ahead of print date: 26 February 2018

Identifiers

Local EPrints ID: 418482
URI: http://eprints.soton.ac.uk/id/eprint/418482
ISSN: 1996-1073
PURE UUID: 1a10d107-d525-47ff-9160-08d55459848d

Catalogue record

Date deposited: 09 Mar 2018 17:30
Last modified: 14 Sep 2021 18:33

Export record

Altmetrics

Contributors

Author: Xiaobo Wang
Author: Chao Tang
Author: Bo Huang
Author: Jian Hao
Author: Guanghui Chen

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×