Abstract
When lightning strikes the communication tower of high-speed railway, the transient ground potential rise (GPR) and ground potential difference (GPD) are important reasons for the damage of signal and power supply equipment in the control room. In this paper, the equivalent circuit model of high-speed railway communication tower and control room ground grid including control room reinforcement conductor is established. The transient ground potential rise and the maximum transient ground potential difference of the control room ground grid are calculated by the time domain method in ATP-EMTP under the two conditions of two ground grids independent arranged or common arranged. The effects of reinforcement material characteristic on the GPR and GPD are also discussed. The calculation results show that equipotential bonding can reduce the maximum GPD between the control room ground grid and the communication tower ground grid. Moreover, the maximum GPD between different locations of the control room ground grid is significantly reduced after considering the potential equalization of the control room reinforcement conductor.
Published Version
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