In this paper, a fault detection method based on SA (simulated annealing) algorithm for jointless track circuit is presented to address the shortcomings of low detection accuracy, long time consumption and impracticability when genetic algorithm is used to detect the faults on jointless track circuit.A shunt state model whose ballast section was piecewise partitioned has been built with the compensation capacitor as the demarcation point, to analyze the relationships among ballast resistor, compensation capacitor and the current amplitude envelope.Based on the above analysis, the SA algorithm was used to calculate the corresponding ballast resistance and compensation capacitance for the current amplitude envelope on each segment, in the order from the sending end to the receiving end, to realize the comprehensive detection on the faults of tract circuit.The results showed that the method illustrated by this paper can not only detect the faults on multiple capacitors accurately but also reflect the partition fluctuation on ballast resistors.Compared with the genetic algorithm, the SA algorithm, with the advantages of high detection accuracy, low time consumption and strong practicability, is more applicable to the comprehensive detection on the faults of jointless track circuit.%针对遗传算法对无绝缘轨道电路进行故障综合检测时,存在检测结果精度低、耗时长以及实用性差等缺点,提出基于模拟退火算法的无绝缘轨道电路故障检测方法.建立以补偿电容为分界点,分段划分道砟区段的分路状态模型,运用该模型分析道砟电阻、补偿电容与分段分路电流幅值包络之间的关系,在上述分析的基础上,从发送端到接收端,依次对每一段电流幅值包络利用模拟退火算法求得与之相对应的道砟电阻值和补偿电容值,实现轨道电路故障的综合检测.实验表明,本文所提出的故障检测方法能够准确检测多个电容故障,并反映出道砟电阻分段波动的情况.与遗传算法相比,该方法检测精度高、耗时短、实用性强,更加适合于无绝缘轨道电路故障综合检测.
展开▼
