Abstract
The surface flashover of supporting insulators of DC gas insulated transmission line(GIL) GIL is mainly induced by surface charge accumulation. The distribution of interior electric field of DC GIL is mainly controlled by conductivity and geometry of insulator made of epoxy resin. Therefore, a model of 500 kV DC GIL is established in this paper, and the influences of geometry, volume conductivity, and surface conductivity of supporting insulators of GIL on electric field distribution are analyzed with the software COMSOL. The results show that the electric field distribution of semi-conical insulators is the optimum, the volume conductivity of the insulators exerts weak influence on the electric field distribution, and the electric field distribution on insulator surface of DC GIL can be controlled and optimized by controlling the surface conductivity of the insulators.
| Original language | English |
|---|---|
| Pages (from-to) | 18-21+24 |
| Journal | Gaoya Dianqi/High Voltage Apparatus |
| Volume | 46 |
| Issue number | 6 |
| State | Published - Jun 2010 |
| Externally published | Yes |
Keywords
- Field distribution
- Field optimization
- Geometry
- Surface charge accumulation
- Surface conductivity
- Volume conductivity
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