Electric Field Models for Liquid-Filled Insulation of Medium-Voltage AC/DC Distribution Technology

Andrea Cremasco, Mitrofan Curti, Jeroen van Duivenbode, Elena A. Lomonova, Daniel Rothmund

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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Abstract

The electric field in a liquid-filled insulation system at uniform temperature, subjected to constant dc voltage is investigated. This work emphasizes the importance of charge transport modeling by electro-hydro dynamic (EHD) equations. The EHD model is compared with the quasi-ohmic conduction (qΩ) model, often preferred for the lower computational cost, by analyzing the electric field intensity between two electrodes separated by mineral oil and impregnated paper insulation. First, the EHD model is verified by measurements available from the literature. Next, to compare the models consistently, the apparent conductivities used in the qΩ model are extrapolated by the verified EHD model, as a function of the electric field intensity. A significant deviation of the qΩ model from both the EHD model and the measurements is observed, due to the presence of space charge in the solid insulation.

Original languageEnglish
Title of host publication2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)
PublisherInstitute of Electrical and Electronics Engineers
Pages450-453
Number of pages4
ISBN (Electronic)978-1-6654-1907-9
DOIs
Publication statusPublished - 14 Feb 2022
EventIEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2021 - Vancouver, Canada
Duration: 12 Dec 202115 Dec 2021
https://ceidp.org/

Conference

ConferenceIEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2021
Country/TerritoryCanada
CityVancouver
Period12/12/2115/12/21
Internet address

Bibliographical note

Funding Information:
ACKNOWLEDGMENT This paper is part of the project Advanced Solid State TRAnsformers (ASSTRA), which is an EU funded Marie Curie ITN project, grant number 765774.

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