5results about How to "Increase the flashover voltage" patented technology

The invention provides a plasma-based modification method for aging resistance and flashover resistance of the surface of an insulating material, and relates to the technical field of surface modification of insulating materials, and the plasma-based modification method specifically comprises the following modification steps: step 1, grinding 40-60 parts of the insulating material and then sieving; step 2, pouring into 40-60 parts of deionized water, and mixing; and 3, pouring 22-25 parts of absolute ethyl alcohol, heating, carrying out ultrasonic dispersion for 10-15 minutes, and stirring. According to the method for modifying the aging resistance and flashover resistance of the surface of the insulating material based on the plasma, the coupling agent cooperates with the plasma to perform composite modification treatment on the surface of the insulating material, so that the grafting rate of the surface of the insulating material and the coupling agent is increased, the surface of the insulating material is etched, the roughness is improved, and the surface energy is increased; further through plasma modification treatment, the direct-current vacuum surface flashover voltage of the insulating material is remarkably improved, and the method is simple in process, safe in process and environmentally friendly and can be widely applied to the field of high-voltage insulating materials.

The present application belongs to the field of direct current transmission, and particularly relates to a support insulator, an insulating support structure and a direct current GIL. In order to solve the technical problem that the electric field lines pass through the support insulator in the prior art, resulting in that the normal field intensity of the side surface of the support insulator is too large, the present application provides a support insulator, which comprises a high-potential support surface for supporting a conductive rod, a low-potential support surface for supporting an insulating cylinder and a side surface, the high-potential support surface and the low-potential support surface are both arc surfaces, the axis of the high-potential support surface and the low-potential support surface corresponds to the axis of the matched conductive rod, and the extension line of the projection of the side surface of the support insulator in the direction of the axis of the corresponding conductive rod intersects with the axis of the conductive rod. The present application further provides an insulating support structure and a direct current GIL using the support insulator. By making the electric field lines parallel to the side surface of the support insulator, the normal field intensity of the side surface of the support insulator can be reduced, and the surface flashover voltage and the insulating strength of the support insulator can be improved.

The present invention discloses a method for modifying the roughness gradient of an insulator for improving the surface flashover of AC / DC, which belongs to the technical field of high-voltage insulating materials, and comprises the following steps: 1) ultrasonically treating and drying a pot-type insulator; 2) selecting a first fine sandpaper with a set mesh number to grind the entire side of the insulator dried in step 1); 3) selecting a first coarse sandpaper with a set mesh number to grind the uncovered part of the insulator obtained in step 2); 4) selecting a second coarse sandpaper with a set mesh number to grind the first gradient of the insulator obtained in step 3); 5) using a roughness tester to frequently measure the roughness of each layer, and uniformly grind the gradient range of each layer to obtain an insulator with a roughness gradient modification. The surface modification treatment method of the roughness gradient of an insulator provided by the present invention can significantly improve the discharge path of the insulator, and provide support for improving the AC / DC surface flashover performance of the insulator.

The invention discloses a preparation method of a basin-type insulator surface fluorination modified coating, and the prepared fluorine-containing composite coating has a surface tangential field intensity and interface charge regulation effect, and can improve the along-surface insulation strength and corona erosion resistance at the same time. Aiming at the defect problem of foreign matters such as metal particles and metal dust existing in the direct current pipeline, the fluorine-containing coating has the characteristics of low surface energy and self-cleaning, and also provides a solution thought for inhibiting dust adsorption.

The present invention relates to a modification method and a testing system for improving the flashover voltage of epoxy resin under low temperature environment, comprising the following steps: step 1, pre-treating nano SrTiO3, removing moisture, and preparing a solution required for modification; step 2, modifying the nano SrTiO3 using the solution required for modification obtained in step 1, and removing moisture from the nano SrTiO3. The present invention adds modified nano SrTiO3 particles to an epoxy resin matrix, and the prepared composite material has strong nonlinear conductivity characteristics, can effectively inhibit charge accumulation, and thus improve the flashover voltage.