一种光纤纵联保护复用通道故障自诊断方法

A Fault Self Diagnosis Method for Multiplexing Channel of Optical Fiber Pilot Protection

针对光纤纵联保护复用通道故障处理效率低、通道故障瞬发情况下处理难度大的问题,提出一种通过监测物理层HDLC短报文实现通道故障诊断的方法。当发生复用通道故障时,通过在通道的空闲时隙发送带有故障状态的短报文,将故障点位置实时反映到两侧光纤纵联保护装置上,实现通道故障自诊断功能。该方法无需断开光纤及2M同轴电缆硬回路,无需退出保护进行自环试验,即可实现通道状态在线诊断,迅速、准确定位通道故障点。

Aiming at the problem of low processing efficiency of multiplexing channel fault of optical fiber pilot protection and great difficulty in processing channel fault in the case of instant channel fault,a channel fault detection method by monitoring the physical layer HDLC short message is proposed.When a multiplex channel fault occurs,the short message with fault status is sent in the idle time slot of the channel to reflect the position of the fault point to the optical fiber pilot protection device on both sides in real time,so as to realize the channel fault self diagnosis function.This method does not need to disconnect the hard loop of optical fiber and 2M coaxial cable,and does not need to exit the protection for self loop test.It can realize the online diagnosis of channel state,and quickly and accurately locate the channel fault point.