358 / 2017-03-10 09:50:56

Research on Influence of Spacer Insulator Material Temperature Characteristics on Its electric Properties

Spacer insulator,Epoxy resin formulations,Temperature characteristics,Finite element simulation

Spacer insulators are important insulating component of GIS. When GIS main circuit followed by operating current, it will heat up the device, spacer insulator's temperature will also rise, resulting in epoxy resin performance decreased, which may causing the change of the electric field along the surface of the spacer insulator. In order to analyze the influence of spacer insulator materials temperature characteristics on the electric performance, the temperature characteristics of the material's relative dielectric constant and dielectric dissipation loss were measured. Then established a spacer insulator electric field simulation model in finite element numerical simulation software, combined with temperature distribution under work condition and the temperature characteristics of relative dielectric constant, analyzed changes of the electric field along the surface of the spacer insulator. Through the experimental research and simulation analysis above, we found that the temperature characteristics of the spacer insulator materials have great impacts on the spacer insulator performance. When temperature increased, material relative dielectric constant will increase and the maximum electric field intensity along the spacer insulator surface declined slightly. In low-temperature region, when spacer insulator at low-temperature, the electric field intensity along the surface increases, electrical performance decrease. Material dielectric dissipation loss increases with increasing temperature, which may lead to thermal breakdown. The conclusion of this paper can provide an important reference for further research about spacer insulator's working performance analysis.