550kV tsaki na ɗaya insulator

Na 550kV single-phase bowl insulator shine tana da muhimmanci a cikin gas insulated metal enclosed switchgear (GIS), kuma yadda ake gina ya kamata ta dace da rarrabban electric field uniformity, mechanical strength, da environmental protection a matsayin tasirin high voltage levels. Wannan shine comprehensive technical analysis da ake yi a cikin harsuna masu zamani:
1、 Design optimization and performance improvement
Geometry optimization
Akwai amfani da contour design na "thick on both sides and thin in the middle", wanda ya ƙara maximum electric field strength along the concave surface by 25.4%, da kuma deformation by 29.9%
Optimize thickness variables (H ₁, H ₂, etc.) and contour variables (C ₁ ₂, C ₁ ∝, etc.) through genetic algorithm to balance electrical and mechanical performance
Application of dielectric gradient materials
Introducing a high dielectric constant region near the grounding flange (such as titanium dioxide filled epoxy resin) significantly improves electric field distortion and reduces SF6 gas usage by 15%
3D printing combined with casting technology achieves dielectric non-uniform structure, increasing flashover voltage by 13.8%
2、 Key parameters and experimental verification
Electrical performance
Power frequency withstand voltage 230kV, lightning impulse withstand voltage 550kV, local discharge capacity ≤ 5pC
After optimization, the flashover voltage of the insulator is increased by 13.6% compared to the conventional structure, and can still be increased by 6.7% in the presence of metal foreign objects
Mechanical performance
The maximum deformation is reduced to 0.45mm, and the interface stress is lower than the material limit (70MPa)
Verify the reliability of the structure through a water pressure failure test (1.5 times the rated pressure)
3、 Manufacturing process and environmental friendliness
Advanced technology
Using aluminum oxide/photosensitive resin 3D printing low dielectric constant body (ε=3.98-4.20), high dielectric constant area (ε=11.32-14.58) vacuum casting, no aluminum ring design simplifies the structure, reducing the risk of SF6 gas leakage
Environmental benefits
The usage of epoxy composite materials decreased by 6.1%, and the usage of SF6 gas decreased by 15%
4、 Typical application scenarios
Ultra high voltage transmission: such as 550kV GIS equipment, suitable for compact substations or high-altitude environments
GIL system: Optimized bowl insulators can reduce the maximum electric field in gas areas by 13.6%, improving the reliability of GIL operation

Note: Customization with drawings is available