适用于铁路贯通(自闭)线的高性能FTU的研制  

Research on FTU of the Railway Power Supply Line

作　　者：毛艳[1] 王章启[1] 沈祥裕 

机构地区：[1]华中科技大学电气与电子工程学院,武汉430074 [2]武汉市武昌电控设备有限公司,武汉430068

出　　处：《高电压技术》2006年第8期111-113,共3页High Voltage Engineering

摘　　要：根据铁路10kV贯通(自闭)线的发展现状、铁路电力贯通(自闭)线供电臂与一般馈电线的区别,研制出实用于供电臂分段开关的FTU。它的硬件结构是以80C196KC为核心,外扩8kRAM、32kROM、2kE2PROM24LC16B、两片MAX125、实时时钟DS12887、逻辑和译码器件EPM7128SQC100Q、液晶控制器6963C。软件部分精确采集并处理FTU安装处的线路三相电流和零序电流,上传各电流的实部和虚部。实验室模拟试验证明,它与上位机STU(Substationterminalunit)组网,只要零序电流>0.1A就能可靠处理并识别单相接地故障的故障段,且相间短路故障能按设定时间和动作电流发跳闸信号,达到非故障区段基本不停电,隔离仅限于故障区段的目标。该FTU可扩展性强,稍加改动便可广泛应用于电力系统的配电自动化网中。Aimed at the status of 10 kV power through feeder line （automatie bloeking line） along the railway, compared the through feeder line with the general eleetrie power feeder, this paper designs a new type of FTU utilized to seetionalizing switeh. FTU＇s hardware of key part is 80C196KC20 and the hardware extends 8kROM, 32kROM, 2kE2PROM24LC16B, two pieees of MAX125, real time elock DS12887, read and write control logie equipment EPMT128SQC100Q, LCD eontroller 6963e. The software aeeurately eolleets three phases and zero sequenee eurrent of line where FTU is installed and then deals with these data Moreover, it also sends all kinds of eurrents＇ real part and imagine part to STU（Substation terminal unit）. Laboratory simulations testify that if FTU eonneets with STU to form a net, it ean reliably loeates and isolates single phase grounding fault when zero sequenee eurrent is higher than 0. 1A, and that when short eireuit fault between phases oeeurs, FTU will send diseonneetion signal whieh is set by time and eurrent in advanee` So it can be realized that non-fault seetion doesnt power eut and the fault seetion is isolated. At the same time, our FTU have strong expansibility, it ean be applied to power system of Distribution Automation System if it ehanges a little.

关 键 词：铁路贯通(自闭)线 馈线远方终端(FTU) 单相接地故障 故障自动隔离 配电自动化网 

分 类 号：U223[交通运输工程—道路与铁道工程]