Review on decomposition characteristics of eco-friendly gas insulating medium for high voltage gas insulated equipment

Xiao, Song; Shi, ShengYao; Li, Yi; Ye, Fanchao; Li, Yalong; Tang, Ju; Zhang, Xiaoxing

doi:10.1088/1361-6463/ac04e4

Cited by 33 publications

(25 citation statements)

References 140 publications

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“…Apart from issues in terms of surface charge accumulation, SF 6 , which has long been used as the main component of the gas insulation, has significant impact on the global warming. Investigating future environmental-friendly insulating gas has become a hot topic [32,33]. Also, forward-looking research regarding recyclable solid insulating materials (i.e.…”

Section: Gas-insulated Equipmentmentioning

confidence: 99%

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

Yang

et al. 2022

High Voltage

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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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Section: Gas-insulated Equipmentmentioning

confidence: 99%

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

Yang

et al. 2022

High Voltage

Self Cite

126

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“…To replace SF 6 gas in engineering [29], the relative DS, BT, and GWP of the gas must be comprehensively considered.…”

Section: Design Range For Sf6 Potential Substitute Gas Moleculesmentioning

confidence: 99%

Research on a prediction model for gas insulation performance based on Pareto optimisation

et al. 2022

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Predicting the insulation performance of SF 6 substitute gases through gas molecular structures has been a popular topic worldwide. The difficulty is that the relationships between the molecular structure and the gas insulation strength, global warming potential and boiling temperature are not clear, and general linear methods cannot be used to effectively extract the key factors. Based on published molecular structure parameters, the grey correlation method is used to extract the factors that affect the gas dielectric strength, global warming potential and boiling temperature in a dynamic (non-linear) approach. Further, to predict the dielectric strength, global warming potential and boiling temperature of gases, a linear regression method and the factors with high correlations are used as independent variables. Through the Pareto optimal solution, the dielectric strength is set as the target, the global warming potential and boiling temperature are set as the constraints, and the ranges of the molecular structure parameters of the SF 6 substitute gas are obtained. This research study provides an important reference regarding the SF 6 substitute gas analysis and provides a research foundation for the design and synthesis of new environmentally friendly gases used in power equipment.

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“…In recent years, C 4 F 7 N (perfluoroisobutyronitrile) has been recognized as a promising alternative gas due to its advanced insulation and eco-friendly performance [6,7]. It has a GWP of 2090 and an atmospheric life of 22 years.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, the dielectric strength of pure C 4 F 7 N gas is twice that of SF 6 and the insulation performance of C 4 F 7 N/CO 2 with 18%-20% C 4 F 7 N is equivalent to that of SF 6 [9]. Comprehensive performance evaluations of C 4 F 7 N on insulation performance [6][7][8][9], decomposition characteristics [10,11] and material compatibility [12] have been conducted, and have demonstrated that C 4 F 7 N has the application potential for both medium-voltage and high-voltage GIE. For example, General Electric successfully developed a 245 kV current transformer and 145 kV gas-insulated switchgear with C 4 F 7 N gas as the insulation medium and put them into trial operation [13].…”

Section: Introductionmentioning

confidence: 99%

Arc decomposition behavior of C ₄ F ₇ N/Air gas mixture and biosafety evaluation of its by‐products

Zhang

et al. 2022

High Voltage

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At present, reports on the arc interruption and decomposition behavior of a C 4 F 7 N/air gas mixture especially the biosafety of its by-products are limited. Herein, a 57% C 4 F 7 N/ 43% air gas mixture was employed as an arc-quenching medium to conduct 200 breaking tests on a load switch (630 A/24 kV). The arc interruption and decomposition behavior of the gas mixture were evaluated, and the biosafety of the decomposition products was assessed based on an acute inhalation toxicity test. It was found that the average arcing time of the 200 breakings was about 10.1 ms and that breakings were basically completed at the zero-crossing of the second or third current half-cycle. The gas mixture after breaking decomposed dramatically (the C 4 F 7 N content decreased by 75.6%), generating a large number of gaseous by-products (CO, CF 4 , C 2 F 6 , C 3 F 8 , CF 3 CN, C 4 F 8 , CO 2 , C 4 F 10 N 2 , C 3 F 6 , C 2 N 2 , etc.) as well as solid by-products (carbon particles). The lethal concentration of 50% (LC50, 4 h) of C 4 F 7 N/air after 200 breakings was 31 ppm (male mice) and 34 ppm (female mice), respectively, and the toxicity was classified as Grade 1. In general, C 4 F 7 N has an arc interruption capability, albeit weaker than that of SF 6 under the same conditions. After breaking, the C 4 F 7 N gas mixture has a relatively high acute inhalation toxicity, and relevant safety protection measures for research or operation personnel are strictly needed.

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Review on decomposition characteristics of eco-friendly gas insulating medium for high voltage gas insulated equipment

Cited by 33 publications

References 140 publications

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

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

Research on a prediction model for gas insulation performance based on Pareto optimisation

Arc decomposition behavior of C ₄ F ₇ N/Air gas mixture and biosafety evaluation of its by‐products

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Review on decomposition characteristics of eco-friendly gas insulating medium for high voltage gas insulated equipment

Cited by 33 publications

References 140 publications

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

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

Research on a prediction model for gas insulation performance based on Pareto optimisation

Arc decomposition behavior of C 4 F 7 N/Air gas mixture and biosafety evaluation of its by‐products

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Product

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Arc decomposition behavior of C ₄ F ₇ N/Air gas mixture and biosafety evaluation of its by‐products