Research purposes: The construction of the passenger dedicated lines(PDL) is speeding up in China. There are various geographical environments, different whether and climatic conditions in the areas where the PDL goes over. Because of the complicated situations , the overhead contact line system(OCS ) is apt to be damaged by the thunders if the lightning conductor being absent. In order to guarantee high reliability of the OCS operation, the study on the lightning protection in the PDL was carried out through theoretical calculation and practical analysis. Based on the analysis of the measures for lightning protection in Germany and Japan, taking the practical situation in China electric railways into consideration , some suggestions were proposed for the lightning protection of OCS system in Guangzhou to Shenzhen railways.
Research conclusions: Whereas the accident of lightning strike occurs frequently in electrical railway in China, after the statistical analysis of the switch-off occurrence due to the lightning, the conclusion was drawn that the earthing lines shall be installed along the Guangzhou to Shenzhen railway and arranged on the top of the poles. In the strong lightning areas, the arrester is necessary to be fixed. In order to guarantee the lightning facility running safely, the grounding of the lightning conductors and the arrester is suggested in the DPL lines.
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