Transient response characteristics of metal oxide arrester under high altitude electromagntic pulse

In order to study the strong electromagnetic pulse effect of the critical vulnerable equipment of power system and evaluate the survival ability of the high-altitude electromagnetic pulse, it is necessary to study the transient response characteristics of the metal oxide arrester to the high-altitude electromagnetic pulse by experiment. In this paper, an experimental platform of high altitude electromagnetic pulse conduction current injection for a typical 10kV metal oxide arrester is set up, and the key parameters such as peak value of overshoot voltage, peak value of residual voltage, action voltage and response time are obtained by the experiment. The results show that: the action voltage of this type of metal oxide arrester is 3.53 times higher than that of its rated voltage, the peak value of overshoot voltage is 2.20 times higher and the peak value of residual voltage is 1.57 times higher than the residual voltage under the lightning impulse current, and the response time varies little with the electromagnetic pulse conduction current amplitude, with an average of 45.86 nanoseconds under high altitude electromagnetic pulse conduction environment.