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A damaged surface with a residual hardened layer was observed on a failure guide surface. Using a two-step laser treatment, a two-scale unit structure with a different spacing was distributed on the failure surface to form a biomimetic surface to recover its property/function. A theoretical equation describing the relationship between the wear resistance increase rate of biomimetic samples and the...
As the further growth in electricity using of Chinese urban residents, in order to meet the requirements of the city, more and more 220kV transformer substations have been constructed in the city as distribution substations. the character of such substations are: 220kV and 110kV high-voltage electrical equipment use GIS; substation area is small; the increasing power system capacity caused short circuit...
This paper discusses current grounding design issues of present electric power plants, transformer substations in high soil resistivity area, by incorporating the actual engineering data of a 220KV substation, analyzes the impact degree of grounding design parameters to earth potential, contact potential, and step potential. It also can be used as a reference point for peers to discuss in engineering...
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