电气化铁路供电线路负线损分析方法

Analysis Method of Negative Line Loss of Electric Railway Power Supply Line

为了降低铁路供电线路线损,建立了铁路供电线路负线损分析系统并对线路中各类线损进行了分析,应用各类服务器软硬件提供的Web服务端功能,对铁路线路汇总线损进行统一管理。铁路供电线路线损管理硬件平台对变压器输入端和用户端电能表信息的采集汇总,基于电力线载波电表的电能采集电路使用MAX485芯片,反窃电装置使用RN8209计量芯片检测线路中是否出现窃电现象。建立铁路线路的元件损耗模型,对等值电阻法进行改进,在原有的供电线路基础上增加线路结构系数。实验结果显示,所提系统计算出的线损误差绝对值都在10W范围内,线损管理时的台区线损合格率都达到96%以上。

In order to reduce the line loss of railway power supply line,this study establishes the negative line loss analysis system of railway power supply line to analyze all kinds of line loss in the line,and applies the software and hardware of various servers with the function of Web service to manage the line loss of railway line in a unified manner.The hardware platform of line loss management of railway power supply line collects and summarizes the information of power meter at transformer input end and client end.The power acquisition circuit based on power line carrier meter uses MAX485 chip,and the anti-electricity stealing device uses RN8209 metering chip to detect whether there is electricity stealing in the line.The element loss model of railway line is established,the equivalent resistance method is improved,and the line structure coefficient is increased on the basis of the original power supply line.Experimental results show that the absolute value of line loss error calculated by this research system is within the range of 10W,and the qualified rate of line loss in the station area during line loss management is above 96%.