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Simulation and Measurement Analysis of Transient Ground Potential Rise in GIS of 110kV Substation

VFTO will be generated during the operation of GIS disconnectors, circuit breakers and other switchgear. This fast transient process will often cause the circulating current of GIS shell and the transient potential rise of GIS shell to ground. In order to study the potential rise mechanism, the transient ground potential rise caused by disconnector operation in a 110kV GIS Substation is simulated and measured on site. By comparing the measured data with the simulation calculation results, the TGPR distribution characteristics of the station are analyzed, and it is found that the two results are consistent. The analysis results will provide a certain reference for formulating the protection and suppression measures of TGPR.