山区电气化铁路贯通地线接地系统研究

针对目前国内山区电气化铁路存在因贯通地线接地电阻不达标,造成感应电流回流不畅,引起通信信号光、电缆烧毁及对信号设备干扰的问题,依托西康二线工程进行山区电气化铁路贯通地线接地系统的方案研究,通过贯通地线接地电阻理论分析,根据接地装置在不同土壤电阻率环境下接地电阻值的差异化,选取科学有效、设计合理的接地地网结构,采用合适的接地材料,结合山区铁路的特点,制定切实可行的改善贯通地线接地电阻实施方案,并成功应用到西康二线工程。

Study on Grounding System Run-through Earth Cable in Mountain Electrified Railway

On account of the incompliance of the resistance of the run-through earth cable in mountain electrified railway, which results in poor reflow induced current, burning of electric and optical communication signal cable and interference to signal equipment,this paper,with reference to the study on the upgrading of the run-through earth cable grounding system of Xi'an- Ankang Second Line of mountain electrified railway,puts forward such practical recommendations as selecting well-designed ground network structure through theoretical analysis of grounding resistance based on the differences of grounding device resistance in soils of different resistivity,using suitable grounding materials in view of the characteristics of mountain railways, and developing practical improvements through grounding resistance embodiments. All these are successfully applied to Xi'an- Ankang Second Line project.