线路光纤保护装置通道告警及解决对策研究  

Research on Channel Alarm and Countermeasures of Line Optical Fiber Protection Device

作　　者：李春波 牛志民 王启航 尹宏[1] 刘守瑞[1] LI Chunbo;NIU Zhimin;WANG Qihang;YIN Hong;LIU Shourui(State Grid Baoding Electric Power Supply Company,Baoding 071000,China)

机构地区：[1]国网保定供电公司,河北保定071000

出　　处：《河北电力技术》2023年第2期46-50,55,共6页Hebei Electric Power

摘　　要：针对220 kV变电站线路光纤电流纵联差动保护装置在运行过程中出现光纤通道告警的相关案例进行了分析。首先,介绍了线路光纤保护系统及光纤通道传送保护信号的方式;然后,分析了光纤电流纵联差动保护的原理和光纤传输系统产生延时的原因,并研究了光纤通道延时对纵联差动保护产生的影响;最后,针对多个光纤通道告警的实际案例进行分析并提出了相应的应对措施。结果表明,光纤通道延时的大小等于整数倍的保护装置采样间隔时,可能会出现数据丢帧并引发通道告警,人为对光纤插件进行拨码配置并改变装置复用光纤通道延时可以消除告警。保护装置插件和2M装置本身出现故障会造成光纤通道告警,通过自环测试等手段确定故障区间并对插件进行更换即可消除告警。此外,装置告警信号接线异常、通道延时拨码错误等也会造成光纤通道报警,对其修正后可消除告警。This paper analyzes the optical fiber channel alarm of the optical fiber current longitudinal differential protection device in a 220 kV substation during operation.Firstly,the optical fiber protection system of the line and the way of optical fiber channel transmitting protection signals are introduced;Then,the principle of optical fiber current longitudinal differential protection and the cause of delay in optical fiber transmission system are analyzed,and the influence of optical fiber channel delay on longitudinal differential protection is studied;Finally,several actual cases of Fibre Channel alarm are analyzed and corresponding countermeasures are proposed.The results show that when the fiber channel delay is equal to an integer multiple of the sampling interval of the protection device,data frame loss and channel alarm may occur.The alarm can be eliminated by manually dialing the optical fiber plug-in and changing the device multiplexing optical fiber channel delay.The fault zone can be determined by means of self-loop test,and the alarm can be eliminated by replacing the faulty protection device plug-in.

关 键 词：光纤线路 纵联差动保护 通道延时 PRS753S光纤保护装置 光纤通道告警 数据丢帧 

分 类 号：TM721[电气工程—电力系统及自动化]