全光纤电流互感器关键器件故障模式分析

Analysis on critical component failure mode of fiber optical current transformer

以全光纤电流互感器的光学和电学器件为研究对象,阐述了系统工作原理及结构组成,通过故障模式影响及危害性分析和故障树分析两种方法对系统进行了可靠性分析,参考互感器在变电站中的应用实例确定了系统的关键器件故障模式,构建了系统光路单元的故障树,根据故障风险优先级数的大小,确定了设计薄弱环节并提出了改进措施,可降低系统关键器件发生故障的风险。针对全光纤电流互感器的实际故障案例进行了分析,验证了系统可靠性分析方法的有效性。

The optical and electrical components of fiber optical current transformer（FOCT）are studied.The principle and structure of the system are described.By means of FMECA and FTA the reliability analysis of the system is made.Through the fault cases in practical application,the critical component failure modes of the system are determined.The fault tree of the optical unit is constructed.According to the risk priority number of failures the design weak points are determined and the improve measures are put forward.In this way the risks of critical components failure can be reduced.The fault cases of FOCT are analyzed and the validity of the system reliability analysis method is verified.