光端机发信功率降低引起的保护装置闭锁故障分析

Analysis of rely protection block caused by power reduction of optical terminal failure

以一个因光纤保护装置光端机发信功率偏低造成的保护装置退出运行的故障实例,阐述了保护装置闭锁故障的分析方法和查找步骤,并提出在处理这类涉及到光纤通道的故障时,应按照"观察、判断、试验"的原则和顺序:首先观察后台和保护装置的告警信息,然后判断故障出现的大致范围,最后通过试验逐步排除故障。为进一步保障保护装置的安全可靠运行,建议为纵差保护装置配置备用光纤通道。

According to an instance of rely protection running out of operation caused by power reduction of optical terminal failure, the analysis methods and steps on dealing with the protection blocking failure are expound. It should be in accordance with the principle of ＂observe,judge,test＂ when dealing the failure in this category：first, observe the background and protection device alarm information to determine the approximate range of the failure, and then test to exclude failure step - by - step. At the same time, for the further reliable operation of the protec- tion, the alternate Fiber Channel is recommended for rely protection device.