This paper combines incoming lines with 500kv GIS
substation, considering the influence of the impulse
voltage-second characteristics of insulator strings, the impulse
corona of incoming lines, the impulse grounding resistance of
tower and the position of lightning. ATP-EMTP simulation
program is applied to analyze the lightning over-voltage of 500kv
GIS substation. The result shows that impulse corona and the
resistance of tower which is close to the substation have great
influence on over-voltage, when lightning strike the tower which
is close to terminal door-typed structure, the lightning
over-voltage may be not the most serious, and when the
over-voltage of the equipment is very serious, a group of arrester
is installed which can decrease the over-voltage effectively. This
research thinking takes safety and economy into account, which
can provide new reference for the engineering
This paper combines incoming lines with 500kv GIS
substation, considering the influence of the impulse
voltage-second characteristics of insulator strings, the impulse
corona of incoming lines, the impulse grounding resistance of
tower and the position of lightning. ATP-EMTP simulation
program is applied to analyze the lightning over-voltage of 500kv
GIS substation. The result shows that impulse corona and the
resistance of tower which is close to the substation have great
influence on over-voltage, when lightning strike the tower which
is close to terminal door-typed structure, the lightning
over-voltage may be not the most serious, and when the
over-voltage of the equipment is very serious, a group of arrester
is installed which can decrease the over-voltage effectively. This
research thinking takes safety and economy into account, which
can provide new reference for the engineering
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