학술논문
Fabrication of Multidimensional Functionally Graded Insulator for HVDC GIS
Document Type
Conference
Author
Source
2023 IEEE 4th International Conference on Electrical Materials and Power Equipment (ICEMPE) Electrical Materials and Power Equipment (ICEMPE), 2023 IEEE 4th International Conference on. :1-4 May, 2023
Subject
Language
Abstract
Gas insulated switchgear (GIS) can encounter the voltage that combines both AC and DC components in a bipolar HVDC. systems. To enhance the insulation performance of the epoxy insulator, the researchers developed a new type of material called multi-dimensional functionally graded materials (MFGM). This material integrates two types of materials, namely the surface nonlinear conductivity materials (SNCM) and the bulk permittivity graded materials ($\varepsilon-\mathbf{F G M}$). The MFGM insulator consists of SNCM layer and $\varepsilon-\mathbf{F G M}$ bulk, which were produced through air spraying technology and layer-by-layer pouring methods. Results indicate that the MFGM insulator reduces the electric field intensity around the HV triple junction by more than 37% and 39% under AC and DC voltages, respectively. Furthermore, the MFGM insulator also raises the flashover voltages under AC and DC voltages by 17.5% and 27.5%, respectively, compared to a uniform insulator (U-insulator). The MFGM insulator can work under both stationary and transient conditions and shows potential for use in HVDC compact gas-insulated apparatuses.