基于六导线模型的接触网广义测距方法研究

Research on Generalized Fault Location Method for Overhead Contact Line Based on Six-Conductor Model

针对不同的工况,牵引供电系统的运营方式比较灵活,在不同供电模式下,故障测距的方法也不同。不同区间、不同故障行别、不同故障类型等因素,在很大程度上增加了测距方法的复杂性。本文提出基于六导线模型的广义测距方法,通过搭建牵引供电系统的六导线模型,以末端并联运行的复杂情况为例,根据全线数据推导出广义测距公式,该方法无需考虑故障区间、故障类型等因素,同时适用于各种复线并联的运行模式;引入线路的不平衡系数,能够根据不同现场情况修正测距结果;利用RTplus牵引供电系统实时数字仿真仪器进行测试,测试结果与理论分析具有较好的一致性,验证了方法的可行性和准确性,完全满足工程需求。

With regard to the different working conditions,the operation modes of traction power supply system are flexible and the fault location methods are different as well under different power supply modes.The complexities of the fault location methods are increased greatly due to factors of different sections,different faults on up-track and down-track as well as different types of faults.The paper puts forward a six-conductor model-based generalized fault location method to deduct the generalized fault location formulae on basis of establishing of six-conductor model with complicated terminal parallel operation as an example.The method,without the requirements of taking into account of the faulty section and types of faults,is adaptive to the operation modes of various paralleled double tracks.The unbalance factor introduced to the line is able to modify the fault location results in accordance with the different site conditions;tests are made by use of real time digital simulation apparatus of RTplus traction power supply system,the test results and theoretical analysis have better consistency,and the feasibility and correctness of the method is verified,fully meeting the engineering requirements.