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Oil-paper insulation system is an extraordinarily essential system of converter transformer as well as HVDC bushing. This paper studies the interface charge accumulation and dissipation characteristics of oil-paper insulation system under DC voltage. In this paper, an induced electrification was used to charge the oil-paper samples. The amplitudes of the DC voltage varied from 1 to 4 kV and the paper...
Silicone rubber (SiR) is a kind of basic insulating material and is widely used to coat porcelain and glass high voltage insulators. In HVDC transmission lines, corona could occur occasionally, which can markedly inject the charges into insulators surface and damage the insulators. The existence of surface charge has a great effect on insulation degradation and plays an important role on dielectric...
Room temperature vulcanized (RTV) silicone rubber (SiR) is a kind of basic insulating material and is widely used to coat porcelain and glass high voltage insulators. In HVDC transmission lines, electric corona could take place even on well-designed hardware and insulators, which could make charge accumulate on the surface of insulators and inject into the surface. However, with the disadvantage of...
Epoxy resin used as insulating material in electronic and electrical devices plays an important role in system reliability. Addition of nanoparticles into epoxy can improve the dielectric properties comparing with the undoped materials. However, due to the change of the material structure, trap characters and charge behaviors are altered as a response. This possibly leads to a great risk of electric...
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