Abstract
It is well known that lettuce-eaters highly destructive, the voltage up to hundreds of
millions of volts, current can be as high as hundreds of thousands of amperes. Lightning
strike caused by the damaging consequences of embodied in the following three levels ：
（1） Equipment damage, casualties; (2) equipment or components reduced life spans;
（3）data transmission or storage of signal (analog or digital) interference or lost, or even
make electronic equipment misoperation and temporary paralysis or the entire system to a
halt. Substation is one of the most important component part of the whole power supply
system, if the substation lightning accident occurs, it will cause blackouts and
inconvenience to the social production and people's lives, which requires lightning
protection measures have to be very reliable. According to the substation, lightning
protection and protection of the substation grounding grid design, the station and the
ground voltage to meet the allowable value, the step voltage and ground voltage does not
exceed the allowable value, the grounding resistance, touch voltage and stepvoltage
requirements are met, select the appropriate equipment of lightning invasion wave
overvoltage protection master plan layout of the electrical substation by substation civil
area, set the rules according to the lightning rod, the requirements of the substation
architecture span and protection stations all electrical equipment,station lightning rod to
set the form of lightning protection measures, so that the whole station equipment in the
lightning protection within. By calculating short-circuit current from the conclusion to
select the appropriate grounding materials, set the ground network; to achieve the purpose
of the full range of lightning protection of substations.
Keywords: power lines 110kv substation lightning protection measures ground
grid design
目 录
