Ring main units with eco-efficient gas mixtures: field experience

Kristoffersen, Martin; Endre, Thor; Saxegaard, Magne; Hyrenbach, Maik; Wang, Per Arne; Harmsen, Denny; Rijn, Theo Van; Vosse, Robert

doi:10.1049/oap-cired.2017.0658

Cited by 8 publications

(7 citation statements)

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“…A pilot gas insulated substation with C 5 F 10 O is in operation in Zurich, Switzerland, using a mixture of 5.6% C 5 F 10 O, 11.1% O 2 and 83.3% CO 2 in the high voltage switchgear with a rated voltage of 170 kV, and C F 10 O/synthetic air mixtures in the medium voltage panels [7,8]. Medium voltage ring main units using C 5 F 10 O/synthetic air mixtures are also available [9]. Several investigations have reported breakdown voltages of C 5 F 10 O mixtures with synthetic air, CO 2 , and CO 2 + O 2 [2,10,11], and the effective ionization coefficient of C 5 F 10 O mixtures with synthetic air has also been recently measured by Aints et al in a steady-state Townsend experiment [12].…”

Section: Introductionmentioning

confidence: 99%

Electrical insulation properties of the perfluoroketone C₅F₁₀O

Chachereau¹,

Hösl²,

Franck³

2018

J. Phys. D: Appl. Phys.

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The electrical insulation properties of pure C 5 F 10 O and of C 5 F 10 O/N 2 and C 5 F 10 O/CO 2 mixtures are investigated in a pulsed Townsend setup. The electron rate and transport coefficients and the density-reduced critical electric field of these mixtures are obtained, and a synergy effect is observed in in C 5 F 10 O/N 2 and C 5 F 10 O/CO 2 mixtures. The total electron attachment cross section of C 5 F 10 O is estimated based on the attachment rate to C 5 F 10 O in diluted C 5 F 10 O/N 2 and C 5 F 10 O/CO 2 mixtures.

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Section: Introductionmentioning

confidence: 99%

Electrical insulation properties of the perfluoroketone C₅F₁₀O

Chachereau¹,

Hösl²,

Franck³

2018

J. Phys. D: Appl. Phys.

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“…The comprehensive performance of environmental-friendly gas insulating medium needs further verification from actual application. Several manufacturers including General Electric (GE), ABB, Xuji Group, et al have launched the C 4 F 7 N, C 5 F 10 O, C 6 F 12 O based 145 kV GIS, 420 kV GIL, 245 kV CT and 10 kV Ring Main Unit and put them into operation in some EU countries, South Korea and China [264,265]. Long term live assessment of the insulation, stability, and material compatibility performance of the environmental-friendly gas insulating medium is necessary.…”

Section: ) Solid Environmental-friendly Insulating Materialsmentioning

confidence: 99%

Insulating materials for realising carbon neutrality: Opportunities, remaining issues and challenges

Yang

et al. 2022

High Voltage

126

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The 2050 carbon‐neutral vision spawns a novel energy structure revolution, and the construction of the future energy structure is based on equipment innovation. Insulating material, as the core of electrical power equipment and electrified transportation asset, faces unprecedented challenges and opportunities. The goal of carbon neutral and the urgent need for innovation in electric power equipment and electrification assets are first discussed. The engineering challenges constrained by the insulation system in future electric power equipment/devices and electrified transportation assets are investigated. Insulating materials, including intelligent insulating material, high thermal conductivity insulating material, high energy storage density insulating material, extreme environment resistant insulating material, and environmental‐friendly insulating material, are categorised with their scientific issues, opportunities and challenges under the goal of carbon neutrality being discussed. In the context of carbon neutrality, not only improves the understanding of the insulation problems from a macro level, that is, electrical power equipment and electrified transportation asset, but also offers opportunities, remaining issues and challenges from the insulating material level. It is hoped that this paper envisions the challenges regarding design and reliability of insulations in electrical equipment and electric vehicles in the context of policies towards carbon neutrality rules. The authors also hope that this paper can be helpful in future development and research of novel insulating materials, which promote the realisation of the carbon‐neutral vision.

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“…However, there are few reports on the influence mechanism of oxygen on the insulation and decomposition properties of C 4 F 7 N–CO 2 –O 2 gas mixture for MV GIE at present. The MV GIE such as gas‐insulated cabinet, ring main units has the operation pressure in the range of 0.1–0.14 MPa (absolute pressure) [34]. Thus, the C 4 F 7 N content in the gas mixture could be higher than that of HV GIE, making it possible to replace pure SF 6 .…”

Section: Introductionmentioning

confidence: 99%

Influence regularity of O ₂ on dielectric and decomposition properties of C ₄ F ₇ N–CO ₂ –O ₂ gas mixture for medium‐voltage equipment

Zhang

et al. 2020

High Voltage

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Fluorinated nitrile (C 4 F 7 N) gas mixture has been introduced as the most promising candidate to replace sulfur hexafluoride using in gas-insulated equipment. In this study, the authors explored the influence of oxygen on the dielectric and decomposition properties of C 4 F 7 N-CO 2-O 2 gas mixture. The authors found that the dielectric strength of the C 4 F 7 N-CO 2-O 2 gas mixture with 2, 4, 6, 8 and 10% O 2 was increased by 4.85%, 6.49%, 7.70%, 3.21% and 2.74% compared with C 4 F 7 N-CO 2. The addition of 2-6% O 2 to the C 4 F 7 N-CO 2 gas mixture could effectively reduce the content of most of the decomposition byproducts such as CF 4 , CO, C 2 F 6 , C 3 F 6 , C 3 F 8 , CF 3 CN, C 2 F 5 CN, (CN) 2. While high content of oxygen (>6%) results in higher decomposition of C 4 F 7 N, which has a negative effect on the stability of C 4 F 7 N gas mixture. Generally, it is recommended to add 2-6% O 2 in the C 4 F 7 N-CO 2 gas mixture to improve its insulation properties as well as inhibit the decomposition of C 4 F 7 N in the discharge for medium-voltage engineering application.

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Ring main units with eco-efficient gas mixtures: field experience

Cited by 8 publications

References 0 publications

Electrical insulation properties of the perfluoroketone C₅F₁₀O

Electrical insulation properties of the perfluoroketone C₅F₁₀O

Insulating materials for realising carbon neutrality: Opportunities, remaining issues and challenges

Influence regularity of O ₂ on dielectric and decomposition properties of C ₄ F ₇ N–CO ₂ –O ₂ gas mixture for medium‐voltage equipment

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Ring main units with eco-efficient gas mixtures: field experience

Cited by 8 publications

References 0 publications

Electrical insulation properties of the perfluoroketone C5F10O

Electrical insulation properties of the perfluoroketone C5F10O

Insulating materials for realising carbon neutrality: Opportunities, remaining issues and challenges

Influence regularity of O 2 on dielectric and decomposition properties of C 4 F 7 N–CO 2 –O 2 gas mixture for medium‐voltage equipment

Contact Info

Product

Resources

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Electrical insulation properties of the perfluoroketone C₅F₁₀O

Electrical insulation properties of the perfluoroketone C₅F₁₀O

Influence regularity of O ₂ on dielectric and decomposition properties of C ₄ F ₇ N–CO ₂ –O ₂ gas mixture for medium‐voltage equipment