Electrical Breakdown Study in CO2 and CO2-O2 Mixtures in AC, DC and Pulsed Electric Fields at 0.1-1 MPa Pressure

Siddharth Kumar (Corresponding author), Tom Huiskamp, A.J.M. (Guus) Pemen, Martin Seeger, Pachin Juriy, Christian M. Franck

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

In this paper, the results of the experiments performed on electrical breakdown in CO2 and CO2-O2 mixtures in weakly and strongly non-uniform fields generated with impulse (2/160) µs, AC and DC waveforms are presented. In weakly non-uniform fields, the electrical breakdown field approximately follows 11 kV/(cm bar) when stressed with both AC and DC (positive and negative) waveforms. For positive impulse, the breakdown voltage is higher and the time lag to breakdown is scattered, indicating a lack of starting electrons from CO2 gas. Furthermore, the breakdown strength of CO2 - O2 (10-30)% mixtures is investigated. On application of negative polarity impulse, the breakdown strength is significantly higher than positive impulse in the measured pressure range of 0.3-0.7 MPa in strongly non-uniform fields, contrary to that seen during breakdown in weakly non-uniform fields. Breakdown voltage for negative impulse is further enhanced in a mixture of CO2-O2 (80-20)%.
Original languageEnglish
Article number9351859
Pages (from-to)158-166
Number of pages8
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Volume28
Issue number1
DOIs
Publication statusPublished - 9 Feb 2021

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