基于S注入法的自闭贯通线路故障定位系统

将S注入法和无线传输节点相结合，利用传感器网络的自组网功能以及高容错性构建了无线节点通信网络．提出了采用传感器网络技术的铁路自闭贯通线故障定位系统．该系统由信号注入装置、无线节点、开关站无线处理单元和智能故障信息处理系统构成．通过无线节点检测注入信号．智能故障信息处理系统接收无线节点传来的检测结果，并判断故障位置．注入信号的电源为恒流源，频率范围为220～320Hz．设计了并列方式和交错方式两种检测节点的布置方案．这两种方式均能满足信息传输可靠性的要求，但并列方式的系统可靠性比交错方式提高了2倍．该系统定位精度可根据需要调整．

Fault Location System for Automatic Block and Continuous Transmission Lines Based on S-Injection Method

A wireless-node communication network was designed to detect single-phase-to-ground faults in railway automatic blocking and continuous transmission lines by combining S-injection method with wireless nodes.The system makes use of automatic net-organization function and high fault-tolerant characteristic of sensor networks.It is composed of a signal injection device,wireless nodes,a wireless process unit at the switch station and an intelligent fault detection system.Signals are injected on a wireless node.The intelligent fault detection system receives the detected results transmitted from the wireless node and locate the fault position.Determined by simulations,the power source is of constant current and its frequency ranges from 220 to 320 Hz.The sensors are arranged in two modes: parallel and interleaving.These two modes both meet the requirement of reliability for information transmission,but the reliability of the former is as triple as that of the latter.The locating precision of the system is adjustable according to application.