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The temperature distribution is vital to the lifetime and reliability of converter transformer bushings. However, the temperature distribution of epoxy impregnated paper converter bushings under a certain current has usually been calculated through the two dimensional model, without considering the heat convection and radiation effects. In this paper, using the computational fluid dynamics (CFD) and...
UVH GIS (gas insulated switchgear) spacer is the key insulator in UVH transformer substation. Beside insulation, it may suffer the pressure from other structures and SF6 gas in the bus, which put forward a higher request on the mechanical properties of GIS spacer, the concentration of stress may cause tiny flaws which will lead to discharge on the spacer. In order to analyze the mechanical strength...
Epoxy spacers play supporting conductors, isolating chambers and electrical insulation roles in gas insulated switchgear (GIS), affecting the insulation level and equipment lifetime of GIS. Inappropriate configuration of GIS spacer will not only lead to flashover or partial discharge when imposed by high voltage but also bring about micro cracks during mechanical delivery test. UHV AC GIS spacers...
Owing to its complex structure, high electric field strength, the rigid jumper on 1000kV double circuit tension tower is prone to corona that needs suppression and much more consideration. Using three dimensional finite element method software ANSYS, the electric field distribution on the surface of rigid jumper with aluminum tube structure was calculated when considering the effect of tower, fittings,...
Ultra high voltage (UHV) AC Gas Insulated Switchgear (GIS) spacer is one of the most important components in GIS. In the process of long-term operation, partial discharge often occurs at the interface between the center conductor and epoxy resin (EP) basin body if this interface has some defects, and the discharge sometimes even leads to the crack of basin. It has become a bottleneck for the safe...
UHV AC GIS spacer is the critical component of gas insulated switchgear (GIS) in UHV substation. It plays a supporting conductor, isolating chamber and electrical insulation role. Defects of GIS spacer like delamination, metallic particles, protrusions will be introduced during manufacturing, installation, operating process, etc. These defects will worsen electrical field distribution and degrade...
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