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在2006年开通的京沪、沪昆电气化铁路中,电力牵引采用的是单相工频27kV交流制供电方式。由于供电方式本身、牵引网材质与绝缘性能和外界环镜因素,使得工作中的牵引电流在接触网周围产生连续分布的交变电磁场和电磁辐射(如图1),在特定条件下还会产生强放电现象。电力机车强电设备,在封闭的机车空间里会产生强电磁场。电磁场的出现,会在信号机械室内电子元件、铁
In the Beijing-Shanghai, Shanghai-Kunming electrified railways opened in 2006, the power traction uses a single-phase power frequency 27kV AC power supply. Due to the power supply itself, the traction network material and insulation properties and the external ring mirror elements, making the work of the traction current in the catenary around the continuous distribution of alternating electromagnetic fields and electromagnetic radiation (Figure 1), under certain conditions will produce Strong discharge phenomenon. Electric locomotive power equipment, in a closed locomotive space will have a strong electromagnetic field. The emergence of electromagnetic fields, electronic components in the signal machinery room, iron