高速铁路牵引回流不平衡性指标分析

Analysis of Unbalanced Coefficient of High-speed Railway Traction Return Current

研究目的:在新建高速铁路联调联试和动态检测过程中,由于缺乏对于牵引回流指标的检测方法和限值要求,从而影响高铁工程的建设质量和动态验收。本文针对当前检测标准中的回流指标检测缺项,提出高速铁路牵引回流不平衡性指标考核参数,制定分等级判据,以期为高速铁路综合接地系统工程整改、动态检测和动态验收提供依据。研究结论:(1)将铁路上下行贯通地线回流不平衡系数作为牵引回流不平衡性的分析指标,经过差异显著性检验,认为贯通地线不平衡系数只需制定一套质量判据,不必区分线路类型;(2)将上下行贯通地线回流不平衡系数取值范围分为β≤0.43和0.43<β≤0.70分别作为工程质量优良与合格的判别区间,超出区间的数值判定为较差等级;(3)该研究成果适用于新建高速铁路工程联调联试和动态检测中的综合接地系统动态检测,其他采用综合接地系统的新建铁路工程可参照施行。

Research purposes： In the process of high - speed railway joint test and dynamic detection, the lack of testing methods and limit requirements for traction return index impacts on high - speed rail construction quality and dynamic acceptance. According to the current detection standards in the reflow index detection missing, this paper proposed the imbalance index assessment parameters of high - speed railway traction return current and established grading criteria, to provide the basis for rectification, dynamic detection and dynamic acceptance of high - speed railway integrated grounding system engineering. Research conclusions： （ 1 ） The unbalanced coefficient of the ground return line of the railway is used as the analysis index of the imbalance of the traction return current. After the difference test, it is necessary to establish a set of quality criterion passing the unbalanced coefficient of ground lines, without differentiating line types. （2） The range of the backflow unbalanced coefficient of the upstream and downstream ground return is divided intoβ≤0.43 and 0.43 〈β≤0.70 which is regarded as the interval of good and qualified engineering respectively, and the value beyond the above interval is judged to be poor level. （3） The research results can be applied to the integrated grounding dynamic detection of new high - speed railway engineering joint test and dynamic detection, and can be referred for new railway projects using integrated grounding system.