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Aiming at the problem of conducting particle pollution in DC-GIL, surface charge accumulation on the post-insulator is analyzed based on COMSOL and the platform for surface charge measurement. In this study, two surface charge accumulation models of the post-insulator with particle pollution were established taking the particle pollution, as well as the generating, recombination, migration and diffusion...
In this paper, the motion behavior has been analyzed and the effect of particle trap's shape and size on the capture efficiency of particulate traps in DC GIL has been studied. This paper constructs a scale model the actual coaxial cylindrical GIL transmission unit and particle trap, and with the particles charging process in the electric field taken into consideration, the COMSOL multi physics simulation...
To investigate the motion and discharge behavior of free conducting linear particles in DC GIL, a coaxial cylindrical electrode is set up, with a high-speed camera to observe the motion and air-gap breakdown of the particles. The research work studies the charging behavior of the particle under DC voltage, then analyzes the particle's lifting voltage theoretically and experimentally. Two different...
With the superiority of compactness, high reliability and the great transmission capacity, gas-insulated lines (GIL) has been widely used especially in certain regions. However, free metal particles may be brought into the closed structure inevitably. To study the problem of metal-particles pollution in AC GIL, the electromechanics of one spherical metal particle is analysed in a pragmatic situation...
To solve the problem of metal-particle pollution in DC GIL, in a more realistic situation of coaxial cylindrical electrodes, the motion analysis of spherical metal particles is done based on DC GIL structure. Based on the theory of fluid mechanics and considering the SF6/N2 mixtures parameters, analysis of the flow resistance in the process of particle movement is proposed. Based on the collision...
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