基于分布参数模型的牵引网故障测距新算法

简单、快速、准确的故障测距是电气化铁道牵引网急需解决的问题,为此,提出一种利用线路单端电压及电流的测量值来进行精确故障定位的新算法,该算法采用分布参数模型,精确考虑了分布电容对测距算法的影响,大大提高了测距算法的精确度.针对牵引网供电臂距离较短的特点,对故障距离函数进行线性化处理,在保证精度的同时,提高了算法的简洁和快速性.通过电磁暂态仿真引擎(EMTDC)仿真验证,该算法基本不受过渡电阻、故障发生角等因素的影响,测距结果准确且鲁棒性强.

A Novel Fault Location Algorithm for Traction Network Based on Distributed Parameter Line Model

The simple,fast and accurate fault location for traction network of electric railway is the problem to be solved urgently.A novel fault location algorithm is presented which uses voltage and current measured from single terminal.The distributed parameter line model is applied and the effect of capacitance to ground is precisely considered,so the precision is greatly enhanced.The function of fault distance is linearized because of short power feeder for traction network of electric railway,thus simplicity and quickness of the algorithm is improved as well as high accuracy is ensured.The EMTDC(Electromagnetic Transients for DC) based digital simulation has shown that the algorithm is not only of high accuracy and robustness,but also not affected by fault resistance and incidence angle.So it has a highly valuable prospect for engineering practice.