10kV铁路输电线路故障信息综合处理系统研究

Comprehensive Research on Transmission Line Fault Information for 10 kV Railway Power System

通过对10kV铁路自闭、贯通输电线路特点的分析,研究了其相间短路、单相接地等不同故障的特性,并在此基础上设计了故障信息综合处理系统.该系统通过分析采集到的数据,由远方控制单元判定故障类型且将故障数据报文送往调度中心,该中心根据判据判定出故障区段:对于相间短路,调度中心会自动启动相应的程控卡片,快速切除故障区段;对于单相接地,在工作站上会自动报警.同时,为系统设计了换相算法、单相接地算法和故障检测判别流程等.换相算法以配电所为参考来拟订其物理相序,其余开关站或配电所的物理换相位置则通过矩阵与配电所参考物理相位置的乘积获得.试验和现场运行表明,该系统可以有效、及时、准确地判别故障位置和故障相以及故障类型等,大大缩短了故障查找的时间.

Through the analysis of the traits of 10 kV railway auto-blocking and continuous feed line, the characteristics of different faults such as short circuit between phases and grounding failure of single phase were researched. On this basis, a fault information process system was designed. After analyzing of the data acquisition, the remote transmission unit of this system can judge the fault style and send the data to the scheduling center by which the fault section can be judged. If it is a short circuit between phases, the center can startup the corresponding program control card to separate rapidly the fault section and give an alarm about the condition of phase grounding. Several critical technologies used in this system such as phase switch algorithm, fault detection and flow estimation, and single phase grounding algorithm were discussed. The test and field operation indicate that this system can estimate fault section, fault phase and fault type efficiently, accurately and rapidly, and the fault search time is greatly shortened. The system can increase both of economic and social benefits.