Abstract
In order to analyze the influence of the damaged structure of the grounding grid outside the enclosure of the substation on the safety parameters of the station, to improve the safety and stability of the operation of the substation, and to reduce the outage maintenance time in case of failure in the station, the simulation of the main grounding grid and the external grounding grid of the specific substation is established in CDEGS The test model simulates the change of power frequency grounding resistance and safety parameters such as contact voltage and step-by-step voltage after three different forms of off-site grounding grid are damaged. It is concluded that when the external grounding grid of the specific substation is damaged, the safety parameters in the station will no longer meet the requirements of relevant regulations. The research results of this paper can be concluded as follows: The damage of the grounding grid laid outside the enclosure of the substation provides the reference research steps.
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