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The Insulation Performance of Novel Refrigerant Gas as an Alternative to SF6 for Medium Voltage Switchgear

Gas-insulated systems are widely utilized in the electric power sector to transmit and distribute electrical energy. Sulphur-hexafluoride (SF6) has dominated gas insulation in high-voltage insulation technology since the early 60s. It is a greenhouse gas with a protracted lifespan in the atmosphere....

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Main Authors: Ahmed, Rizwan, Abd-Rahman, Rahisham, Ullah, Zahid, Ullah, Rahmat, Sami, Irfan, Mohd Yousof, Mohd Fairouz
Format: Article
Language:English
Published: Ieee Acces 2024
Subjects:
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://eprints.uthm.edu.my/12438/1/J17930_4343e4c221c5000fa2f4ed52c3b18064.pdf
http://eprints.uthm.edu.my/12438/
https://doi.org/10.1109/ACCESS.2024.3382716
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spelling my.uthm.eprints.124382025-01-31T03:48:40Z http://eprints.uthm.edu.my/12438/ The Insulation Performance of Novel Refrigerant Gas as an Alternative to SF6 for Medium Voltage Switchgear Ahmed, Rizwan Abd-Rahman, Rahisham Ullah, Zahid Ullah, Rahmat Sami, Irfan Mohd Yousof, Mohd Fairouz TK Electrical engineering. Electronics Nuclear engineering Gas-insulated systems are widely utilized in the electric power sector to transmit and distribute electrical energy. Sulphur-hexafluoride (SF6) has dominated gas insulation in high-voltage insulation technology since the early 60s. It is a greenhouse gas with a protracted lifespan in the atmosphere. This paper proposes an economical and comparatively more environmentally friendly R507 gas alternative to SF6 for medium-voltage applications. R507 has been analyzed experimentally through power frequency breakdown and lightning impulse testing to validate the performance and theoretical concepts. R507 has a very low liquefication temperature of −46.7◦C, but it must still be mixed with buffer gases such as CO2, N2, or dry air to meet the diverse liquefaction temperature applications. Various field utilization factors under AC and lightning impulse voltages are used in the experiments, along with different electrode geometries, including sphere-to-plane and rod-to-plane (i.e., quasi-homogeneous and inhomogeneous electric field distribution). For comparison, identical experiments are conducted with pure SF6. R507 gas was found to be a promising substitute for SF6 gas, with its dielectric strength being approximately 0.95 times that of SF6 gas. A positive synergistic effect is present between R507 and CO2, along with the good self-recoverability property of the gas mixture. The current research study serves as a fundamental resource for characterizing the R507/CO2 gas mixture insulation properties to be utilized in practical applications. Ieee Acces 2024 Article PeerReviewed text en http://eprints.uthm.edu.my/12438/1/J17930_4343e4c221c5000fa2f4ed52c3b18064.pdf Ahmed, Rizwan and Abd-Rahman, Rahisham and Ullah, Zahid and Ullah, Rahmat and Sami, Irfan and Mohd Yousof, Mohd Fairouz (2024) The Insulation Performance of Novel Refrigerant Gas as an Alternative to SF6 for Medium Voltage Switchgear. Digital Object Identifier. pp. 1-12. https://doi.org/10.1109/ACCESS.2024.3382716
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
language English
topic TK Electrical engineering. Electronics Nuclear engineering
spellingShingle TK Electrical engineering. Electronics Nuclear engineering
Ahmed, Rizwan
Abd-Rahman, Rahisham
Ullah, Zahid
Ullah, Rahmat
Sami, Irfan
Mohd Yousof, Mohd Fairouz
The Insulation Performance of Novel Refrigerant Gas as an Alternative to SF6 for Medium Voltage Switchgear
description Gas-insulated systems are widely utilized in the electric power sector to transmit and distribute electrical energy. Sulphur-hexafluoride (SF6) has dominated gas insulation in high-voltage insulation technology since the early 60s. It is a greenhouse gas with a protracted lifespan in the atmosphere. This paper proposes an economical and comparatively more environmentally friendly R507 gas alternative to SF6 for medium-voltage applications. R507 has been analyzed experimentally through power frequency breakdown and lightning impulse testing to validate the performance and theoretical concepts. R507 has a very low liquefication temperature of −46.7◦C, but it must still be mixed with buffer gases such as CO2, N2, or dry air to meet the diverse liquefaction temperature applications. Various field utilization factors under AC and lightning impulse voltages are used in the experiments, along with different electrode geometries, including sphere-to-plane and rod-to-plane (i.e., quasi-homogeneous and inhomogeneous electric field distribution). For comparison, identical experiments are conducted with pure SF6. R507 gas was found to be a promising substitute for SF6 gas, with its dielectric strength being approximately 0.95 times that of SF6 gas. A positive synergistic effect is present between R507 and CO2, along with the good self-recoverability property of the gas mixture. The current research study serves as a fundamental resource for characterizing the R507/CO2 gas mixture insulation properties to be utilized in practical applications.
format Article
author Ahmed, Rizwan
Abd-Rahman, Rahisham
Ullah, Zahid
Ullah, Rahmat
Sami, Irfan
Mohd Yousof, Mohd Fairouz
author_facet Ahmed, Rizwan
Abd-Rahman, Rahisham
Ullah, Zahid
Ullah, Rahmat
Sami, Irfan
Mohd Yousof, Mohd Fairouz
author_sort Ahmed, Rizwan
title The Insulation Performance of Novel Refrigerant Gas as an Alternative to SF6 for Medium Voltage Switchgear
title_short The Insulation Performance of Novel Refrigerant Gas as an Alternative to SF6 for Medium Voltage Switchgear
title_full The Insulation Performance of Novel Refrigerant Gas as an Alternative to SF6 for Medium Voltage Switchgear
title_fullStr The Insulation Performance of Novel Refrigerant Gas as an Alternative to SF6 for Medium Voltage Switchgear
title_full_unstemmed The Insulation Performance of Novel Refrigerant Gas as an Alternative to SF6 for Medium Voltage Switchgear
title_sort insulation performance of novel refrigerant gas as an alternative to sf6 for medium voltage switchgear
publisher Ieee Acces
publishDate 2024
url http://eprints.uthm.edu.my/12438/1/J17930_4343e4c221c5000fa2f4ed52c3b18064.pdf
http://eprints.uthm.edu.my/12438/
https://doi.org/10.1109/ACCESS.2024.3382716
_version_ 1823094307786063872
score 13.23648

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