电气化铁路分区所接地网参数计算

Calculation of Parameters for Earthing Net of Sectioning Post of Electrified Railway

提出了电气化铁路分区所接地参数计算的方法。通过建立牵引供电系统短路回流模型,仿真得到分区所短路入地电流的分流系数,确定在有无综合地线情况下分区所接地电阻限值。对2种土壤分布类型的地网进行仿真计算,得到最大接触电位差、跨步电位差及其分布;研究结论同样可用于AT所、开闭所。

The methods for calculation of parameters of earthing net for sectioning post of electrified railway has been put forward. The distribution factors for the current flowing into the ground from the sectioning post due to short circuit have been obtained by means of simulation on basis of the short circuit return model established for the traction power supply system, and the earthing resistance limit value for the sectioning post with a precondition that whether there is integrated earthing wire or not. The maximum contact potential difference, step potential difference and their distribution have been obtained by simulation and calculation made on the earthing net with distribution of two types of soils; the researches and conclusions may be applied the AT post and subswitching post as well.