This paper investigates lightning surge overvoltages on a coil system of a magnetic-levitation train, when lightning hits an overhead ground wire (GW) to protect the coils. The paper considers an elevated railroad with height of about 20m from the earth surface and iron structures which were neglected in the previous investigations. The overvoltage induced to the coil due to the lightning current on the GW increases by about 30/100 when considering the grounding lead of the GW.
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