The primary and secondary fusion technology makes the arrangement of secondary intelligent sensor unit in the distribution switch close to the primary high-voltage electromagnetic environment

and the distribution switch has a large number of faults due to electromagnetic interference. In this paper

based on the principle of controlled arc discharge

a transient electromagnetic interference simulation test platform for a 10 kV primary and secondary fusion distribution switch is set up

and the interference signal of the outdoor primary and secondary fusion distribution switch is obtained

in which the law of spatial magnetic field near the intelligent sensor is mainly studied. The shielding effectiveness of the distribution terminals (FTU) is analyzed

and the interference of power line of the sensor merging unit is calculated. The results show that the intelligent sensor in the primary and secondary fusion distribution switch may have serious fault under the continuous strong transient electromagnetic disturbance. The electromagnetic transient simulation test system studied in this paper can check the anti-strong electromagnetic interference ability of intelligent sensor

and the existing standards cannot meet the detection requirements of anti-strong electromagnetic interference ability of intelligent sensor equipment under the primary and secondary fusion structure.