高速铁路牵引变电所亭地网回流动态验收标准的修改方案研究

Research on the Modification Scheme of Dynamic Acceptance Standard of Grounding Return Current in Traction Substation of High-speed Railway

本文介绍了现行的高速铁路牵引所回流指标,介绍了高速铁路牵引供电回流系统的组成,计算了牵引供电回流各支路的分流系数,分析了影响回流分配的各种因素。结合直接供电加回流和AT供电方式的地回流特征与差异,指出根据方差偏离均值的程度进行地回流指标判定和质量分级标准存在的缺陷。最后,综合全路高速铁路牵引供电接地系统和地网回流的情况,提出高速铁路牵引变电所地网回流动态验收标准的修改方案建议。

The grounding return current index and the composition of the grounding return current system of traction power supply system of high-speed railway are introduced in this paper.The shunt coefficient of each branch of traction power supply system is calculated.The various factors affecting the return current distribution is analyzed.Combined with the grounding return current characteristics and differences of direct power supply and AT power supply mode,it is pointed out that there are defects in the grounding return current index and quality classification criteria,according to the degree of variance deviation from the average value.Finally,based on the situation of the grounding system and the return current in the traction power supply system of the high-speed railway,the modification scheme of the dynamic acceptance criteria of the grounding return current is put forward.