Particle trajectories and its charging behaviors: effect of gas type and electric field.

Nanotechnology

State Grid Corporation of China, Beijing, People's Republic of China.

Published: March 2021

Conductive particles in the gas insulated transmission lines (GIL) induce the breakdown between electrodes or the flashover along insulators. To solve the problem of particle moving and realize the particle-moving regulation, particle trajectories should firstly be determined in air and SF. This paper presents the results of particle trajectories and its charging behaviors at vacuum and SF6, respectively. Metal particles with different materials and sizes were introduced and the charge quantity was calculated. The results showed that the particle lift-off electric field in SF was higher than that in air under the same gas pressure, that is, the charge on particle in SF was about 0.789 times lower than that in air under the same condition. Besides, the lift-off electric field of particle increased with the pressure increase of SF. The charge on particle was affected by the concentration of electric field near particle and the electrical negative features of SF. The work provided the data support for development of DC GIL in particle defect suppression.

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http://dx.doi.org/10.1088/1361-6528/abce31DOI Listing

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