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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(EM TDC)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 simple, fast and accurate fault location is an urgent problem to be solved in electrified railway traction network. To solve this problem, a new algorithm for accurate fault location using single-ended line voltage and current measurements is proposed. The algorithm uses distributed parameter model , Accurately consider the impact of distributed capacitance on the ranging algorithm, greatly improving the accuracy of the ranging algorithm. Aiming at the short distance of the power arm of the traction network, the fault distance function is linearized, which improves the conciseness and quickness of the algorithm while ensuring the accuracy. The electromagnetic transient simulation engine (EM TDC) simulation results show that the algorithm is not affected by the transition resistance, fault angle and other factors, accurate ranging results and robustness.