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因电气化铁路接触网沿铁路线露天架设,使其成为易受雷击伤害的设备。我国高速铁路多位于田野、郊区,高架桥梁多,其接触网更易受到雷击的侵害。接触网遭受雷电压后,一般表现为跳闸、重合闸、合闸成功。此时,接触网一般都能正常运用。由于难以确定雷击是否造成了接触网断线、塌网等灾害,在高速铁路运营中,一般需首列动车组限速运行,以避免高速运行动车组引起大面积接触网损坏情况的发生。本文总结了我国高铁接触网防雷设计及运营中雷击情况,对加强高速铁路接触网防雷措施进行探讨。
Due to the electrified railway catenary is erected along the railway line in an open air, making it vulnerable to lightning damage to the equipment. Most high-speed railways in our country are located in the fields, suburbs and viaducts. Their catenary networks are more vulnerable to lightning strikes. Catenary suffered lightning voltage, the general performance of the trip, reclosing, closing success. At this point, the catenary can generally be used normally. Because it is difficult to determine whether a lightning strike has caused a disaster such as a breakage of a contact net or collapse of a network, in the operation of high-speed railways, it is generally necessary to first speed-limit the operation of the EMU to avoid the occurrence of a large-area contact network damage caused by the high-speed EMU operation. This article summarizes the lightning protection design and operation of high-speed rail contact network in our country, and discusses the measures to strengthen lightning protection of high-speed railway contact network.