Surface functional graded spacer for compact HVDC gaseous insulated system

Li, Jin; Liang, Hucheng; Wang, Z. H.

doi:10.1109/tdei.2018.007708

Cited by 72 publications

(30 citation statements)

References 4 publications

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“…The concept of SFGMs was proposed to form functionally graded layers on insulator surfaces. Without changing the bulk properties, it is feasible to optimise the E‐field distribution by surface treatment, which means regulating the dielectric parameter distributions on the insulator surface [44].…”

Section: Surface Fgm (Sfgm) Insulator For Compact Gis/gilmentioning

confidence: 99%

Promising functional graded materials for compact gaseous insulated switchgears/pipelines

Liang

Chen

2020

High Voltage

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The electric field distributions along gas-solid interfaces determine the reliability, lifetimes and sizes of gaseous insulated switchgears/pipelines (GIS/GIL), which also affect the reliability of power systems. In this study, the characteristics of steady and transient electric field distributions were first introduced, followed by the concept of functionally graded materials (FGMs). The development histories of FGM applied in electrical engineering and the related optimisation methods were described in detail. The field regulation effect and fabrication technology of different FGM insulators were also compared. To overcome the limitations of traditional FGM insulators, the design of surface FGM (SFGM) was proposed, together with their preparation methods and electrical performance. Furthermore, the future development prospects of FGM and SFGM insulators for compact GIS/GIL were summarised.

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Section: Surface Fgm (Sfgm) Insulator For Compact Gis/gilmentioning

confidence: 99%

Promising functional graded materials for compact gaseous insulated switchgears/pipelines

Liang

Chen

2020

High Voltage

Self Cite

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“…Given the limitations of the above methods and inspired by the gradient insulation adopted in various insulators, generator windings, and vacuum surfaces [28], we propose a novel method of hierarchically controlling material resistance in the structure discussed above.…”

Section: Hierarchically Controlling Materials Resistancementioning

confidence: 99%

Investigation on distribution of electro‐thermal coupled field and improved design of ±1100 kV converter valve‐side bushing

Liu

Chen

Liang

et al. 2020

IET Science, Measurement & Technology

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“…However, DC GIL technology has been lagging behind AC GIL. The results show that the existing AC GIL cannot be used in highvoltage DC (HVDC) system, which is mainly due to its internal different gas-solid insulation characteristic under DC voltage stress, and the charge accumulation at the gas-solid interface [10][11][12][13]. Therefore, knowing the fact that whether the alternative gas C 3 F 7 CN and its mixture can be applied to the DC system and/or the eco-friendly DC GIL can be successfully developed in the near future is of great significance for the establishment of future energy channels including the innovation of traditional power transmission and distribution methods and the acquisition of new energy sources such as offshore wind power.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of C ₃ F ₇ CN/CO ₂ gas mixtures in high‐voltage DC GIL: a review on recent advances

Chen

Wang

et al. 2020

High Voltage

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With the rise of renewable energy resources, especially offshore wind power plant, the DC transmission concept has attracted more and more attention. The selection of eco‐friendly insulating gas, as most critical insulating part of gas‐insulated equipment is top priority for developing highly reliable system. Moreover, it is acknowledged that eco‐friendly C3F7CN/CO2 gas mixtures have become a potential alternative to SF6 gas due to its excellent performance. This study reviews the basic physical properties of C3F7CN gas/gas mixtures and insulation properties including the gas gap breakdown and surface flashover performance at DC, as well as lightning impulse voltage. Investigation about the gas stability is presented, including the compatibility of gas with solid materials in gas‐insulated transmission line (GIL), and the decomposition characteristics under long‐term electrical and thermal stresses. The important progress on the charge accumulation characteristics of gas–solid interface in the novel gas environment under DC voltage stress is analysed. Finally, the key issues that need to be paid attention to and further followed through regarding the application of this novel gas in GIL are summarised and put forward. This study hopefully can provide a complete reference for the development of eco‐friendly DC gas insulation equipment with C3F7CN/CO2 gas mixtures.

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Surface functional graded spacer for compact HVDC gaseous insulated system

Cited by 72 publications

References 4 publications

Promising functional graded materials for compact gaseous insulated switchgears/pipelines

Promising functional graded materials for compact gaseous insulated switchgears/pipelines

Investigation on distribution of electro‐thermal coupled field and improved design of ±1100 kV converter valve‐side bushing

Feasibility of C ₃ F ₇ CN/CO ₂ gas mixtures in high‐voltage DC GIL: a review on recent advances

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Surface functional graded spacer for compact HVDC gaseous insulated system

Cited by 72 publications

References 4 publications

Promising functional graded materials for compact gaseous insulated switchgears/pipelines

Promising functional graded materials for compact gaseous insulated switchgears/pipelines

Investigation on distribution of electro‐thermal coupled field and improved design of ±1100 kV converter valve‐side bushing

Feasibility of C 3 F 7 CN/CO 2 gas mixtures in high‐voltage DC GIL: a review on recent advances

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Feasibility of C ₃ F ₇ CN/CO ₂ gas mixtures in high‐voltage DC GIL: a review on recent advances