Study on electric field characteristics of GIS basin insulator with air gap defects and dielectric functionally graded materials
Air gap defect is one of the common internal defects in GIS,which can cause electric field distortion.The introduction of dielectric functional graded materials can optimize the local electric field of basin insulators.However,under the combined effect of air gap defect and dielectric functional graded materials,its electric field characteristics are not yet known.Therefore,an electric field simulation model of GIS basin insulator with uniform medium and dielectric functional graded materials(ε-FGM)was built in this paper,and the influence of the existence of air gap and air gap position on the electric field distribution of insulators with uniform medium and ε-FGM was discussed.The results show that the introduced dielectric functional graded materials have a relatively ideal regulatory effect.When air gap defects are doped in a uniform medium,the field strength of air gap near the high-voltage conductor,insulator middle,and grounding shell will significantly increase,and the increase rate is 85.32%,78.10%,and 68.69%,respectively.The influence trend of air gap defects on the electric field characteristics of insulators with ε-FGM is basically consistent with the influence trend on the uniform media,but from a specific numerical perspective,there is still a certain difference.Air gap defects have a greater impact on the electric field of insulators with ε-FGM.When designing insulators with ε-FGM,special attention should be paid to suppress the air gap defects in medium.
air gap defectGIS basin insulatordielectric constantfunctionally graded materialsfinite element methodelectric field characteristics
万方数据
维普
